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File Seek time


Chicago_Bob

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On Your Flash thumb drives has seek time been tested?

I have read the specs that indicate 19MB/sec read

But what about the seek time of the drive?

This is very important as I am looking to buy a few and

Raid0 stripe them togther to get the Max I/O possible but if

the seek time on the unit is too slow then this is of no help.

So are there any stats on this?

 

Bob

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Why? For desktop video usuage.

The flash drives are becoming large enough, fast enough and cheap enough to be used as a Raid0 pair on a laptop so you can edit video content.

Flash drives are vibration and shock tolerant as well. BUT.. Seek time is crucial!

How fast can an editing app find a frame and how soon can deliver it.

 

Editing video takes into account 2 things

1) Consant read speed

2) Seek time

The more speed the better.

 

I would also like to see I/O speeds on a USB 2 device using Flash in Raid0 pairs and know its power consumption -vs- hard disks. With sizes starting to creep up to 16GB solid state hard drives seem pretty sexy for their durability.

 

Thanks,

Bob

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Why? For desktop video usuage.

 

Well, the next question is how would you RAID them? I have never seen a USB controller that can hardware RAID its drives. I have never seen a laptop (or any RAID controller for that matter) that allows striping, spanning, etc for drives on the USB controller. Is there a software application that will allow this to be done? And, I HAVE seen where some video editing applications do NOT play well with software RAID. This sounds like more trouble than it's worth. Have you found that a single external HD is not sufficient?

 

Mike.

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The only people I have seen trying this much are using the MAC OS X software RAID utility. And, most are finding drawbacks:

 

http://arstechnica.com/reviews/hardware/flash.ars/8

 

I do suppose that the WIN XP software RAID utility will do the same but, it seems like much trouble for little gain.

 

Here is an indepth discussion starting in 2002 and going to 2005. It seems it "can" be done but, why would you want to when there are better options available?

 

http://www.mp3car.com/vbulletin/showthread.php?t=11920

 

I'd trust this before I decided to try to edit with software RAID running flash media:

 

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=1089071&Tab=0&NoMapp=0

 

Good luck if you try it, let us know how it works out. You may turn out to be a pioneer.

 

Mike.

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