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View Full Version : HDDSCAN - results need guidance on results


Annisman
20th August 2019, 23:56
I have 10 hdds total, using HDDSCAN under the 'SMART' diagnostics test - 4 of them are showing what appears to be errors. Can someone with knowledge of this tool please explain what they mean and if drive failure is imminent.

The first pic is my C drive, an old 120gig Mushkin SSD, the last 3 pics are all Seagate 3TB drives.

https://ibb.co/jW3TdDb

https://ibb.co/9ZBpTXb

https://ibb.co/cxmzwgN

https://ibb.co/26Z5rtD

StvG
23rd August 2019, 02:02
They look fine. See which attributes to watch the most - https://www.backblaze.com/blog/what-smart-stats-indicate-hard-drive-failures/. Add 82 (Used Reserved block) (ssd).

Annisman
23rd August 2019, 06:14
Thank you !

StainlessS
23rd August 2019, 09:30
I have noticed in the past that "SMART 197 Current Pending Sector Count" [on linked site], can be caused by some spurious error[eg cabling, loose connector error],
and when this happens, WXP (cant remember if I've ever had this with W7), then the OS will run the drive at crippled speed which will
(as far as I have seen) never be 'un-crippled' again. Only way that I've found to 'un-cripple' device is to go back to an OS image from
prior to the spurious error, where it will work just fine again at full speed(even though SMART for that error may still be flagged).

No idea what the "Current Pending Sector Count" thing is supposed to be.

EDIT: "crippled speed", as if eg DMA for drive has been switched OFF, although no indication from OS that this is the case, OS may say that DMA is ON, but
high CPU usage would suggest that PIO is in use rather than DMA.

EDIT: Current Pemnding sector Count:- https://harddrivegeek.com/current-pending-sector-count/

StvG
23rd August 2019, 13:36
"After you’ve zeroed the drive you should be able to re-check the errors and see whether or not the sectors are still pending. If the pending sector count has dropped, be sure to check the reallocated sector count and ensure it has not also increased. If you reallocated sector count increases then I’d strongly suggest replacing the drive." - from https://harddrivegeek.com/current-pending-sector-count/

After writing zeros to the drive those pending sectors either are removed as pending (they are fine) or are marked as bad sectors (either as Reallocated Sector or as Uncorrectable Error...).

Emulgator
23rd August 2019, 14:33
Hi StainlessS,
EDIT: "crippled speed", as if eg DMA for drive has been switched OFF,
although no indication from OS that this is the case, OS may say that DMA is ON, but
high CPU usage would suggest that PIO is in use rather than DMA...
Only way that I've found to 'un-cripple' device is to go back to an OS image from
prior to the spurious error, ...
I found the same with a XP surveillance PC where one lady of the staff had cleverly sabotaged the CPU heatsink,
broke just one clamp hook off (and the fuse holder of the +12V camera supply !),
just so that it went unnoticed for months.
In consequence this PC suffered from hard power-downs which left HDDs, later CPU challenged and damaged.
Only a small wrinkle in the PC case told me, misplaced screws, missing pieces of the broken fuseholder,
thefts.. And then matching the duty plan, of course...
As the heatsink was refitted properly, system HDD traffic was unbearably slow.
It took some time for me to find out that in XP one can assign a HDD mode.
Device Manager -> IDE ATA/ATAPI Controller -> IDE Channel 0 -> Properties -> Extended (?)
The offending HDD was indeed set to PIO mode by the OS which saw UDMA2 for that HDD as unreliable,
so went for a fallback.
You can actually go there and IIRC there was a dropdown that allowed to go back to UDMA2,
which helped after restart, no rollback necessary.

StainlessS
23rd August 2019, 15:18
In the cases that i was referencing, stuff in Device Manager [same IDE/ATAPI stuff as mentioned by Emulgator]
said was on DMA, but was really not [really PIO].