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Old 19th May 2020, 02:25   #1  |  Link
FranceBB
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Is my HDD going to fail?

Hi there,
my computer began to fail to boot randomly when I use Fedora: sometimes it does sometimes it doesn't.
Generally, when it boots, it shows a list with a series of logs of the things that are starting 'till it gets to the login page (it's how Fedora works), however when it doesn't it just shows a blank black screen, no logs, no messages, nothing, just a black empty screen. If I reboot and I try two or three times without changing anything, it finally boots and everything works as expected.
I even tried with 10 different kernels with no success: it still behaves the same (with the exception that on top of this, newer kernels can't detect my fan so it's a "no no" for me).
I have two drives, an old Toshiba HDD from 2016 which has Fedora and a relatively new NVME Intel SSD from 2018 which has Windows 10 and my beloved Windows XP.
This is the output of the S.M.A.R.T Test for both of them:

SATA HDD from 2016 with Fedora:

Code:
=== START OF INFORMATION SECTION ===
Model Family:     Toshiba 2.5" HDD MQ01ABD...
Device Model:     TOSHIBA MQ01ABD100
Serial Number:    76GJT8W0T
LU WWN Device Id: 5 000039 7219070e9
Firmware Version: AX0R2J
User Capacity:    1,000,204,886,016 bytes [1.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    5400 rpm
Form Factor:      2.5 inches
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ATA8-ACS (minor revision not indicated)
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Mon May 18 23:52:35 2020 BST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

General SMART Values:
Offline data collection status:  (0x00)	Offline data collection activity
					was never started.
					Auto Offline Data Collection: Disabled.
Self-test execution status:      (   0)	The previous self-test routine completed
					without error or no self-test has ever 
					been run.
Total time to complete Offline 
data collection: 		(  120) seconds.
Offline data collection
capabilities: 			 (0x5b) SMART execute Offline immediate.
					Auto Offline data collection on/off support.
					Suspend Offline collection upon new
					command.
					Offline surface scan supported.
					Self-test supported.
					No Conveyance Self-test supported.
					Selective Self-test supported.
SMART capabilities:            (0x0003)	Saves SMART data before entering
					power-saving mode.
					Supports SMART auto save timer.
Error logging capability:        (0x01)	Error logging supported.
					General Purpose Logging supported.
Short self-test routine 
recommended polling time: 	 (   2) minutes.
Extended self-test routine
recommended polling time: 	 ( 238) minutes.
SCT capabilities: 	       (0x003d)	SCT Status supported.
					SCT Error Recovery Control supported.
					SCT Feature Control supported.
					SCT Data Table supported.

SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
  1 Raw_Read_Error_Rate     0x000b   100   100   050    Pre-fail  Always       -       0
  2 Throughput_Performance  0x0005   100   100   050    Pre-fail  Offline      -       0
  3 Spin_Up_Time            0x0027   100   100   001    Pre-fail  Always       -       1326
  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       1796
  5 Reallocated_Sector_Ct   0x0033   100   100   050    Pre-fail  Always       -       0
  7 Seek_Error_Rate         0x000b   100   100   050    Pre-fail  Always       -       0
  8 Seek_Time_Performance   0x0005   100   100   050    Pre-fail  Offline      -       0
  9 Power_On_Hours          0x0032   044   044   000    Old_age   Always       -       22509
 10 Spin_Retry_Count        0x0033   135   100   030    Pre-fail  Always       -       0
 12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       1779
191 G-Sense_Error_Rate      0x0032   100   100   000    Old_age   Always       -       46
192 Power-Off_Retract_Count 0x0032   100   100   000    Old_age   Always       -       385
193 Load_Cycle_Count        0x0032   048   048   000    Old_age   Always       -       520262
194 Temperature_Celsius     0x0022   100   100   000    Old_age   Always       -       36 (Min/Max 12/47)
196 Reallocated_Event_Count 0x0032   100   100   000    Old_age   Always       -       0
197 Current_Pending_Sector  0x0032   100   100   000    Old_age   Always       -       0
198 Offline_Uncorrectable   0x0030   100   100   000    Old_age   Offline      -       0
199 UDMA_CRC_Error_Count    0x0032   200   200   000    Old_age   Always       -       0
220 Disk_Shift              0x0002   100   100   000    Old_age   Always       -       0
222 Loaded_Hours            0x0032   055   055   000    Old_age   Always       -       18192
223 Load_Retry_Count        0x0032   100   100   000    Old_age   Always       -       0
224 Load_Friction           0x0022   100   100   000    Old_age   Always       -       0
226 Load-in_Time            0x0026   100   100   000    Old_age   Always       -       268
240 Head_Flying_Hours       0x0001   100   100   001    Pre-fail  Offline      -       0

SMART Error Log Version: 1
No Errors Logged

SMART Self-test log structure revision number 1
Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Short offline       Completed without error       00%     22506         -
# 2  Short offline       Completed without error       00%      9637         -
# 3  Extended offline    Aborted by host               90%      9637         -
# 4  Extended offline    Completed without error       00%      6676         -
# 5  Extended offline    Aborted by host               90%      6673         -

SMART Selective self-test log data structure revision number 1
 SPAN  MIN_LBA  MAX_LBA  CURRENT_TEST_STATUS
    1        0        0  Not_testing
    2        0        0  Not_testing
    3        0        0  Not_testing
    4        0        0  Not_testing
    5        0        0  Not_testing
Selective self-test flags (0x0):
  After scanning selected spans, do NOT read-scan remainder of disk.
If Selective self-test is pending on power-up, resume after 0 minute delay.
NVME SSD from 2019 with Windows 10 and WinXP:

Code:
=== START OF INFORMATION SECTION ===
Model Number:                       INTEL SSDPEKNW010T8
Serial Number:                      BTNH90810PRS1P0B
Firmware Version:                   002C
PCI Vendor/Subsystem ID:            0x8086
IEEE OUI Identifier:                0x5cd2e4
Controller ID:                      1
Number of Namespaces:               1
Namespace 1 Size/Capacity:          1,024,209,543,168 [1.02 TB]
Namespace 1 Formatted LBA Size:     512
Local Time is:                      Mon May 18 23:54:08 2020 BST
Firmware Updates (0x14):            2 Slots, no Reset required
Optional Admin Commands (0x0017):   Security Format Frmw_DL Self_Test
Optional NVM Commands (0x005f):     Comp Wr_Unc DS_Mngmt Wr_Zero Sav/Sel_Feat Timestmp
Maximum Data Transfer Size:         32 Pages
Warning  Comp. Temp. Threshold:     77 Celsius
Critical Comp. Temp. Threshold:     80 Celsius

Supported Power States
St Op     Max   Active     Idle   RL RT WL WT  Ent_Lat  Ex_Lat
 0 +     4.00W       -        -    0  0  0  0        0       0
 1 +     3.00W       -        -    1  1  1  1        0       0
 2 +     2.20W       -        -    2  2  2  2        0       0
 3 -   0.0300W       -        -    3  3  3  3     5000    5000
 4 -   0.0040W       -        -    4  4  4  4     5000    9000

Supported LBA Sizes (NSID 0x1)
Id Fmt  Data  Metadt  Rel_Perf
 0 +     512       0         0

=== START OF SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

SMART/Health Information (NVMe Log 0x02)
Critical Warning:                   0x00
Temperature:                        33 Celsius
Available Spare:                    100%
Available Spare Threshold:          10%
Percentage Used:                    0%
Data Units Read:                    7,937,553 [4.06 TB]
Data Units Written:                 9,910,024 [5.07 TB]
Host Read Commands:                 185,445,136
Host Write Commands:                62,433,576
Controller Busy Time:               2,095
Power Cycles:                       351
Power On Hours:                     4,628
Unsafe Shutdowns:                   43
Media and Data Integrity Errors:    0
Error Information Log Entries:      0
Warning  Comp. Temperature Time:    0
Critical Comp. Temperature Time:    0
Thermal Temp. 1 Transition Count:   609
Thermal Temp. 1 Total Time:         7024
Is it the Hard Drive? Is it going to die? Should I backup everything immediately or perhaps it could be something else?
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Old 19th May 2020, 02:59   #2  |  Link
videoh
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Greetings FranceBB! Of course you should backup immediately! And you should be doing that on a regular basis. I backup my full system every two days. Macrium Reflect if you are wondering.

Yes, your HDD is going to fail. It's only a question of when. I would replace all HDDs with SSDs. Sure, they fail too but I believe with a higher MTBF and they are a boat-load faster, which makes frequent backing up feasible. My system backs up in 30 minutes, running quietly in the background and not interfering with my work. Thank you shadow volume service!

Sorry, can't help with linux systems. Been thinking bout buying me one (extra points for identifying the reference there). Hint: Got enough money for a coca-cola.

Last edited by videoh; 19th May 2020 at 03:06.
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Old 19th May 2020, 07:17   #3  |  Link
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The only potential problem I can see is:
Code:
10 Spin_Retry_Count        0x0033   135   100
https://en.wikipedia.org/wiki/S.M.A.R.T.
Quote:
Count of retry of spin start attempts. This attribute stores a total count of the spin start attempts to reach the fully operational speed (under the condition that the first attempt was unsuccessful). An increase of this attribute value is a sign of problems in the hard disk mechanical subsystem.
I would replace the hdd to verifiy if it is really the issue in your system. If it still happens, check ram, cable connectors, power supply etc. I had computers where I just had to re-insert the ram sticks and everything was ok again :/

I use Macrium Reflect too, it's a very solid backup tool. Can 100% recommend.
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Last edited by ChaosKing; 19th May 2020 at 07:21.
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Old 19th May 2020, 10:58   #4  |  Link
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If the NVME with Windows 10 /XP boots fine in the same computer the odds are that the HDD is the culprit
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Old 19th May 2020, 12:01   #5  |  Link
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Macrium Reflect[free edition] will cope with anything, even if it dont recognise the filesystem on partition.
On W10/Android Tablet/Laptop 2-in-1 type thingy, will backup/restore all (approx 15) partitions of W10/Android without knowing what they all are.

EDIT: You dont get much sound from a 2.5 in drive, for 3.5 inch drives can often hear when a drive is on its last legs.
Listen to Spin-up on switch on, one of my machines sometimes dont spin up on power-on, and needs 3 or 4 power ups [on occasion] before it works OK,
need a new drive for it. Any drive that 'ticks' is also a sure fire warnig that is gonna die soon. [think 'tick' is track seek failure with reset/retry]

EDIT: And always have a good working image of all your operating systems, if problems, (hard drive, malware, whatever],
just restore the good image, no sweat involved.
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Old 19th May 2020, 16:50   #6  |  Link
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Immediately replace the drive.

Hard drives are not to be trusted. The second they step out of line, they get taken out back and shot

Another vote from Macrium Reflect. Great app for migrating disks!
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Old 20th May 2020, 01:20   #7  |  Link
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Quote:
Originally Posted by videoh View Post
Greetings FranceBB! Of course you should backup immediately! And you should be doing that on a regular basis. I backup my full system every two days. Macrium Reflect if you are wondering.

Yes, your HDD is going to fail. It's only a question of when. I would replace all HDDs with SSDs. Sure, they fail too but I believe with a higher MTBF and they are a boat-load faster, which makes frequent backing up feasible. My system backs up in 30 minutes, running quietly in the background and not interfering with my work. Thank you shadow volume service!
Quote:
Originally Posted by Blue_MiSfit View Post
Immediately replace the drive.
Got it! I will definitely replace the HDD with an SSD of the same size. Since I have only one NVME slot, I'm gonna use one of the Sata III ports, so I'm gonna buy a 2.5'' one.

Quote:
Originally Posted by ChaosKing View Post
I use Macrium Reflect too, it's a very solid backup tool. Can 100% recommend.
Quote:
Originally Posted by StainlessS View Post
Macrium Reflect[free edition] will cope with anything, even if it dont recognise the filesystem on partition.
On W10/Android Tablet/Laptop 2-in-1 type thingy, will backup/restore all (approx 15) partitions of W10/Android without knowing what they all are.
Quote:
Originally Posted by Blue_MiSfit View Post
Another vote from Macrium Reflect. Great app for migrating disks!
Well, I guess I'll give it a shot, especially 'cause I've been keeping backups every 3 months or so of my Windows and Linux drives, but only by manually copying the whole drive with dd by booting in Linux through a USB (not my main fedora install) and writing things like:

dd if=/dev/sda of=/dev/sdb bs=512b conv=noerror,sync status=progress

this command basically copies an HDD mounted in sda to another mounted in sdb with a block size as little as 512 Bytes (0.512 KB) so that it's less prone to error (i.e errors in a certain block will only affect that block but since it's very small it's not gonna be substantial). It's slow and it's painful to sit there and watch the terminal update as you can't do anything else, but it's probably the safest method. I promised myself to do that periodically and I do but only once every 3 months as it's a drag, let's be honest...
I think dd it's like super old fashioned and there are probably more modern alternatives, so I'm gonna try Macrium Reflect since you all suggested it.

Quote:
Originally Posted by StainlessS View Post
You dont get much sound from a 2.5 in drive, for 3.5 inch drives can often hear when a drive is on its last legs.
Listen to Spin-up on switch on, one of my machines sometimes dont spin up on power-on, and needs 3 or 4 power ups [on occasion] before it works OK,
need a new drive for it. Any drive that 'ticks' is also a sure fire warnig that is gonna die soon. [think 'tick' is track seek failure with reset/retry]
I've heard several very bad sounds coming from external hard drives while I was at work: the most common scenario was when HDDs used by some cameraman to temporarily copy files were either dead for too many bad start/stop or because they fell (with the latter way more common than the former). The hard part was to explain journalists why they had to ask cameraman to send another copy as they used to stare at me wondering why those hard drives didn't work. Poor hard drives, some of them really had a tough life...
In my own personal case, though, I never heard any bad sound coming from my personal hard drives. Every time an HDD died it was because I was starting to see re-allocated sectors but I never heard any noise. The only ones who were making a noise after they died (2) had the classic "click of death".
My first hard drive was a very slow PATA with 40 GB happily running Windows98SE. I've changed many hard drives in my whole life, but guess what? That drive still works as of today (I don't use it of course, but if I plug that in, it works and it has been serving files regularly for years before I put it in my shelf).

Last edited by FranceBB; 20th May 2020 at 01:27.
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Old 20th May 2020, 12:04   #8  |  Link
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My first hard drive cost me about £400.00, and was 20MB.
(I still got the enclosure, but with 512MB drive [16 partitions would you believe], for Atari ST, still got that too).
[My first double density 3.5 (720KB) floppy drive was about £160.00, with interface, Sinclair QL, might have had some memory expansion too, 128KB or 256KB or thereabouts].

I like to keep OS and data physical drives completely separate. I use OS drive only for temp stuff, eg downloads, until I decide where to put it.
OS image is good idea, I like to take it back to an early image every now and then, start fresh with any updates, get rid
of accumlated crud. Dont really need backup of OS installer, W7, W10, Linux, Android x86, setup images easily downloadable.
I never ever use "My Documents" for anything, losing OS and data simultaneously would not taste good, and I dont bother
to move My Documents to separate partition/drive, just dont like being told where to put stuff. Any OS stuff put on my data
drive is swiftly dealt with[deleted], I dont care what it puts on OS drive, but my data drives are mine. [Sometimes a pain
where eg M$ Office used to write crud 'cache' on biggest drive, gets deleted quickly, need to uninstall, and reinstall with
all data drives offline so it cant 'crud them up'.]
Data requires separate backup, currently No1 machine 2 internal drives, and 4 external [EDIT: actually 5], also right in front of me I see 5 x 2.5 inch external
USB drives which can be used for backups, so I generally like plenty of space for stuff.
TestDisk and Photorec also invaluable every now and then when you lose some data on corrupt drive or maybe just due to accidental deletion.

TestDisk:- https://www.cgsecurity.org/wiki/TestDisk
PhotoRec:- https://www.cgsecurity.org/wiki/PhotoRec
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Old 20th May 2020, 14:09   #9  |  Link
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Quote:
Originally Posted by StainlessS View Post
My first hard drive cost me about £400.00, and was 20MB.
400 quids?! Shut the front door, that's insane! O_O
I just found a website showing prices from 1955 to today and apparently they used to be way more expensive than I thought: https://jcmit.net/diskprice.htm

Quote:
Originally Posted by StainlessS View Post
(I still got the enclosure, but with 512MB drive [16 partitions would you believe], for Atari ST, still got that too).
I've never seen an Atari in my whole life. I mean, sure, I've seen it in pictures, but not a real one. It's way too old, long before I was even born! My first console was Nintendo Entertainment System but only 'cause it was way cheaper than any other console since it has been released years before my parents bought it. I remember Super Mario. Play Station 1 and Nintendo 64 followed, however my first FIFA was FIFA 2000. I also had a game boy pocket which I did use when the very first Pokèmon game was released. Boy, I enjoyed every second of it back then...
As a side note, I stopped playing videogames after several years, in late 2012, when I realized my childhood was long gone.

Quote:
Originally Posted by StainlessS View Post
I never ever use "My Documents" for anything, losing OS and data simultaneously would not taste good, and I don't bother
to move My Documents to separate partition/drive, just don't like being told where to put stuff.
Same here, I don't use "My documents" or the default music directory etc. I have them in a separate NTFS partition that can be accessed both by Linux and Windows, 'cause it would be a pain to be able to listen to my music from only one OS (since I have a multi-boot with GRUB).

Last edited by FranceBB; 20th May 2020 at 14:16.
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Old 20th May 2020, 14:24   #10  |  Link
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Quote:
Originally Posted by FranceBB View Post
400 quids?! Shut the front door, that's insane! O_O
Yep, I can confirm that.
You can get a 16TB drive now for about 450 bucks. Just for fun, calculate what that storage space would have cost back then.
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Old 20th May 2020, 14:47   #11  |  Link
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Quote:
calculate what that storage space would have cost back then.
oooOOOh, lots I think.

Quote:
It's way too old, long before I was even born!
I've got socks that are older than you.

EDIT: Got an Amiga 1200 with 10MB RAM, sadly only a 128MB hard drive, I need one [EDIT: 2.5 inch internal] in the 2GB range
which will be about max supported unless I hack it. (Max supported size for the ATARI was about 128MB I think,
I had to hack the driver (loaded from first HD track), to get it running with 512 MB drive.
10MB on Amiga is monstrous, I give 2MB to RAM disk cos I dont know what else to do with it.

EDIT: Can fit another 2MB PCMCIA card to Amiga 1200 for max possible RAM of 12MB, maybe I find one some day,
and also must keep lookout for the MC68000 floating point co-processor [68001 or something like that] and a appropriate speed crystal.
Then will be pretty much max'd out.

EDIT:
FranceBB hard/floppy drive price DB puts price of 720KB 1984 floppy drive at about $400.00, perhaps I underestimated cost of mine a little bit,
but 1986 20MB @ $498 looks about right for price and year of mine [although exchange rate woulda been different then].
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Old 21st May 2020, 01:40   #12  |  Link
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Storing data reliably for a long period of time is really hard.

Ever since a hard drive failure wiped out all my photos and videos from a ~5 year period of my life I've never trusted single drives. Anything important needs at least 2 copies, and really ideally 4-5 copies.

Here's my strategy:

1) Main desktop PC has several SSDs and several mechanical drives. I spread out my libraries of data across the disks according to performance requirements.

2) Backblaze backs up everything important to their cloud, all encrypted of course

3) I have nightly robocopy scripts replicate important things (namely my photo libraries) from one local drive to another so I have 2 fast and simple local copies

4) Other nightly robocopy scripts also replicate important things to my server, which is an older PC with a pair of 8 TB drives in a Windows Storage Spaces mirrored software RAID and a ReFS filesystem on top of it.

5) Really really important cold data gets some special treatment outside this system
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Old 25th May 2020, 09:24   #13  |  Link
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Please welcome two new Samsung 1TB 2.5'' Sata III SSD.

So now I'm totally HDD free:

- Intel NVME 1 TB for Windows 10 and Windows XP
- Samsung EVO 2.5'' Sata III 1TB for Fedora Linux and Android
- Samsung QVO 2.5" Sata III 1 TB for data storage and archive.

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Old 25th May 2020, 11:39   #14  |  Link
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FranceBB, hope you noticed the XP x265/ffmpeg thing I posted yesterday in "General Discussion\SORTED Windows 7 Pro Sux big time", thread.
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Old 25th May 2020, 12:18   #15  |  Link
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Quote:
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FranceBB, hope you noticed the XP x265/ffmpeg thing I posted yesterday in "General Discussion\SORTED Windows 7 Pro Sux big time", thread.
Ah, yes, I was aware of that website. As a matter of fact, I have been using http://wp.xin.at/x265-for-winxp-and-winxp-x64 ever since the x265 builds I used to download from http://msystem.waw.pl/x265/ stopped being XP compatible.
I think it should be publicized here on Doom9 though 'cause it took me quite a bit of time to find someone who was still maintaining XP compatible builds.
This reminds me that perhaps I should make a new H.266 VVC XP compatible build since no one has done that and I was the only one who did it last time...
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Old 25th May 2020, 12:42   #16  |  Link
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Please welcome two new Samsung 1TB 2.5'' Sata III SSD.
I have the same drive, very fast and reliable. For storage and backup purposes I still rely on mechanical enterprise drives in my NAS units.
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Old 27th May 2020, 06:59   #17  |  Link
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The thing I like about HDDs compared to SSDs is that when SSD dies, it often goes without warning you much. When HDD starts its death spiral, it will start giving you small hints of things to come.
Being a cheap b*****d, I have many old HDDs in my PC and replace them as they start dying, maybe 1-2 every year. The average age must be around 5 years, and the oldest one will soon turn 9

Whatever your choice is, I can recommend Hard Disk Sentinel for monitoring. I've been a registered user for years, and it has saved me from a lot of work a few times.
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Old 28th May 2020, 03:30   #18  |  Link
Asmodian
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HDDs can have the same sudden death failure mode SSDs had but HDDs also have the "dust" failure mode that is more of a slow death.

SSDs are getting much better, the issue was that they had unreliable control boards at first. HDDs are so mature that a control board sudden death event was really rare before SSDs even came out. Now that SSDs are more mature they die even more predictably than HDDs, in line with total TBW. Monitoring can also warn effectively for SSDs, and they have less of that "any second now" feel that HDDs have once they start going. The speed of that spiral can vary a lot and it is hard to know how fast it is going to be until things have progressed along. Over the years I have had HDDs that were worrying for a few years and others that spiraled down in a few hours.
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Old 1st July 2020, 04:45   #19  |  Link
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Well, found some stuff on my first 20MB hard drive, has two dates on doc, 1990, and 1991, I was pretty sure it was more like 1986/1987,
maybe only the doc was from those dates and item was from earlier, dont know.
Code:
Specifications for ST-125N
This text file can be obtained by ftp. ASCII linedraw characters are used that display normally in textmode. 
Windows based environments can use the Letter Gothic Line TrueType font to display and print ASCII linedraw characters.
	

                         SEAGATE TECHNOLOGY, INC.
                              1-800-SEAGATE
                          http://www.seagate.com
                            (C)opyright 1991



ST-125N SCSI

                                                 /---+
                                                 | O |12
                                                 | O |G
                                                 | O |G
                                                 | O |5
                       SCSI Connector            \---+
        -----P-W-A---+-------------------------+--------
          o o o o o  |::::::::::::::::::::::::1|
          o o o o o  +-------------------------+
          4 2 1 | P +------1+------1+------1
          --+-- | | +------++------++------+
            |   | |    + Resistor Termination Packs
            |   | |
            |   | +- Parity Check enable
            |   +--- Not Used
            +------- Drive ID's, ID 0 (none) for single drive system


                          ST - 125N

       UNFORMATTED CAPACITY (MB) ________________25
       FORMATTED CAPACITY (26 SECTORS) (MB) _____21.5
       ACTUATOR TYPE ____________________________STEPPER
       TRACKS ___________________________________1,628
       CYLINDERS ________________________________407
       HEADS ____________________________________4
       DISCS ____________________________________2
       MEDIA TYPE _______________________________THIN FILM
       RECORDING METHOD _________________________RLL
       TRANSFER RATE (mbits/sec) ________________7.5
       SPINDLE SPEED (RPM) ______________________3,600
       INTERFACE ________________________________SCSI
       TPI (TRACKS PER INCH) ____________________824
       BPI (BITS PER INCH) ______________________16,546
       AVERAGE ACCESS (ms) ______________________40/28*
       SINGLE TRACK SEEK (ms) ___________________8
       MTBF (power-on hours) ____________________150,000
       POWER REQUIREMENTS: +12V START-UP (amps) _2.0
                           +12V TYPICAL (amps) __0.35
                           +5V TYPICAL (amps) ___0.9
                           TYPICAL (watts) ______9
                           MAXIMUM (watts) ______29
       BUFFERED STEP PULSE RATE (micro sec) _____3-200
       WRITE PRECOMP (cyl) ______________________N/A (408)
       REDUCED WRITE CURRENT (cyl) ______________N/A (408)
       LANDING ZONE (cyl)________________________AUTO PARK
       IBM AT DRIVE TYPE ________________________0 or NONE

       *ST125-0/ST125-1

Seagate reserves the right to change, without notice, product
offerings or specifications. (6/26/90)
The "Unformatted" capacity is before it was Low Level formatted, and only really a theoretical capacity before the sectors are physically 'marked out' on the drive,
together with pre-amble, header, checksums and gaps, and then data and postamble CRC and stuff. Formatted capacity is nothing to do with file system, [EDIT: raw number of physical sectors]
and of course user data capacity is reduced further when filesystem formatting is actually written to the disk.
[EDIT: The term 'formatted capacity' caused manufacturers no end of hassle by constant new user complaints.]

Some more here:- https://stason.org/TULARC/pc/hard-dr...-SCSI1-SE.html

Its this sexy curvy green thing here:- https://www.google.com/search?q=ST-1...1iQVzN_oIzA-MM

It came in a case not unlike the one titled as "Intergra External 20MB SCSI Hard drive", [EDIT: although mine for ATART ST with ACSI instead of SCSI interface]
There is now a 512 MB drive in the case, but I think I also added the old drive in there too (not sure).

Just came across the doc on it so thought I'de give ya a treat.

EDIT: I (a few days ago) picked up a bunch of second hand XBOX 360 2.5 inch SATA hard drives, 10 x 20GB drives (£0.50 each) and 3 x 60GB drives (£1.00 each) [oops + 1 x 80GB],
added them to my collection of backup drives (had to dismantle from XBOX cases), I like having distinct drives for some backups, maybe
1TB or 500GB drives for most stuff, but nice to have 2nd backup for some too. Great to have two hard drive docks that can accept 3.5/2.5 IDE PATA and SATA bare drives,
love the flexibility. Also picked up about 8 x 4GB full sized hi speed SD cards at £1.00 each [or maybe £0.50, not sure], great for small boot tools eg Macrium Reflect,
or SystemRescueCD tools [SystemRescueCD a Linux Gentoo based recovery suite, real good and handy].
EDIT: Spotted a fancy eSata hard drive dock a few days back, I'm gonna want that one too I think.
EDIT: Spent a helluva a long time full formatting and then full scanning each of the XBOX, and sd card drives [+ some others], all perfect working order.

SystemRescueCD [useful for Linux or Windows]:- https://www.system-rescue-cd.org/
Can easily connect to WiFi and internet from within SRCD. One of the most useful tools I've got, and I got a lot of bootable tool images.
EDIT: Recover files from unbootable windows system, or [using TestDisk] recover files from corrupt drives [to eg external USB drive].
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