Fastest HD sustained write speed

[Crucio]

Where can i get a 40 gig or so HD that will write about 160-200 MB/s?

Would i need to use fiber wire or SCSI? I dont think that u can set up that fast of a raid system. Tanx for your time :D

[swing]

no not really. peakperformances (as fas as i know) linux-softwareraid...up to 120 Megs/sec...but with 3 disks (IDE UDMA3)
...however it is theoretically possible to achive up to 200 Megs/sec under the following conditions:
- using 2 or more pci-busses (64 Bit 66MHz) simultaniously
- using 2 or more 64bit/66 Controllers
- using 2 or more (guess at leased 6) fast harddisks

...well just ask this next year...it might be possible...

ciao
andi

[DarkAvenger]

Yeah, over 160MB/s sounds pretty impossible (or at least *very* costly) currently.

[Scuba]

A single drive can handle about 40MB/Sec
I am using a Dual channel U160 SCSI Raid in Raid '0'
I manege to get 140MB/Sec on one channel with 4 HD's. After that the channel can't handle more and there for the second channel.
There is also the question of access/seek Time if you are planing to read more then one file at the same time.
Dual channel U160 SCSI require a 64Bit PCI slot.

[da franksta]

Of course it does, 32 bits times 33 MHz will only get you 112 MB/s

[Crucio]

how much did it cost?

[Scuba]

Alot on Studio budget.
We use it for a T3K work station.

What are your needs for data rate so high ?

[Crucio]

..
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[Scuba]

Owtch.

Dual channel U320 SCSI with several 15K Rpm drives (as you will also want to do some editing).
What card are you going ot use for the capturing ?
don't you think that you will be better off with a dedicated turnkey system like a CineWave on Mac or Discreet Flame ?

[Crucio]

Part of what im going to do for a business is converting betacam tapes to vhs. What resolution does betacam have? What card would be best to capture than.

Also, i will do some studio and wedding stuff. Would it be better to get a 1000 line boxcam and capture directly to a medea setup without tape? or should i just get a consumer xl1s? I dont have $60000 for a variable framerate all in one hdtv cam. So i think i could use a good camera head and capture to the HDs for about 10,000 or less.

what do u think is best? Is the matrox 2500 a good card? I dont think i need any hardware support since ill capture in huffyuv. Unless ofcourse matrox has a lossless codec of its own. Thanx for your help

[Crucio]

when capturing vhs, theres not reason to capture over 400x300, right? since vhs only has 300 lines of verticle rez? and if capturing vhs-c i should only capture at 320x240?

[Scuba]

Where to begin....

To copy a BetacamSP to VHS or any other format you just play out from one deck into the second one.
You might want to put a Audio mixer and/or BBE and/or compressor/normelizer to handle the audio better but apart from this you don't need much.
Resolution have nothing to do with it, as they are all PAL or NTSC.

I think that you don't understand what is HDTV.
In HDTV the resolution is really higher then normal TV.
You can't record it on VHS, You can't watch it on a normal TV, You need special VCR decks, cameras, editing equipment to handle it.
Sure if you can shell out the money for a full HDTV system and on the end a "Down Converter" to make it back to VHS to give your clients the final VHS tape or DVD. But I think you will face a over $100,000 system to start with. Probably much more.
A HD Camcorder alone is about $60,000 and it does not even come with a Lens. A Video Deck to come with it is Extra $27,000

The Martox card is a good card for Home users and the ProSumer market. If you are planing to go Pro You will probably want to look for a more professional card.
(There is a review of the Canopus DV Storm at my site that you might want to take a look at).
In any case, both this cards don't handle HD, and don't even have a Component Inputs for better quality.
Again you will probably want to look at more professional cards then them.

When capturing you will want to capture at D1
D1 resolution is :
720X480 for NTSC and 720X576 for PAL.
Audio quality is 48Khz 16Bit.
This give you a data rate of 42MB/Sec at High quality Uncompressd YUV 4:2:2 broadcast quality.

What is your budget ?

[Crucio]

u c, i am planning to capture betacam and vhs dvd. Thats why i needed to understand the resolution of betacam tapes.

Also i do understand what hdtv is. If you goto sony broadcast site, u will see there is a nice 20 grand box cam that will connect directly to the computer. I will record losslessly and without tape. the camera has 100lines of resolution which should be fine for 720p and 1080p thanx

[theReal]

stupid question:

Why don't you just record your analog video to something like a DV recorder and firewire it to a normal pc?
Or use something like a high quality dedicated capture card in your pc?

I guess you can buy a lot of very good other equipment for the money that a 4-drive U160 SCSI RAID will cost...

[Crucio]

I sort of agree with you. The cost of HDtv equipment is just too higly priced i will wait a couple of years untill it goes down. Untill it does im going to concentrate on archiving copies of tv shows onto dvd. I guess that just a standard capture card can handle tv tapes? ( i think they are betamax?) What kind of filters should be used to capture standard vhs and vhs-c? Should i use an upconverter or line doubler so that i can have 480 lines of rez instead of the standard 250 and 300 in vhs?

Thankyou for your time.

[Crucio]

so is there a special capture card and harddrive for standard 480p resolution?

[Scuba]

If you are going to do lot's of archiving to DVD from BetacamSP then look at the Pinnacle DC2000 card.
I have it and it's very good.

* It capture high quality directly to Mpg2 DVD compatible.
* It have Component and XLR inputs to get the best quality out of the BetaCamSP.
* It have Machine control to be used with the BetaCam SP.
* You can get it as DC2000DV with real time DV I/O as well.
* Editing in real time 2 video channels.
* Very good price.
* You don't NEED a SCSI raid (but it's nice to have)

[Crucio]

ah the answer i wanted, thankyou

[Scuba]

Why didn't you asked before :D

The next level (IMHO) is te Pinnacle Targa 3000.
It have much more options, better quality and upgrades options. Problem is you will need a over 20K for a good working work station.

[Crucio]

btw,
whats the point of having componet input/output?

[Scuba]

:rolleyes:

Qaulity

BetaSP have Component. No reason not to use it if you can.
Don't forget, In DVD quality relate directly to data rate, that relate directly to file size and that go to how much material you can put on a DVD.

[Crucio]

o, ofcourse, im sorry. I forgot all about betacam sp having componet output :)

1 more question, im not sure if this is your field, but, if i did want to make the betacam sp videos into hdtv. Would i capture at 640x480 then use an upconverter or a line doubler? Or is there a way to capture at hdtv?

[Deptmaster]

DELETED

[Scuba]

Beta-SP in NTSC land where you are is 720X480.
To make it into HDTV I think that the best will be a Up-Cunverter on the Beta-SP output before it go to any computer.

I fail to see how you will edit HDTV material or output it :confused:

[Crucio]

im still looking for cards that will capture over the normal 480 verticle resolution. The only viable way i have seen to edit hdtv is nonlinear via a camera and a vtr. So i guess i will just stick to dvd