• Some users have recently had their accounts hijacked. It seems that the now defunct EVGA forums might have compromised your password there and seems many are using the same PW here. We would suggest you UPDATE YOUR PASSWORD and TURN ON 2FA for your account here to further secure it. None of the compromised accounts had 2FA turned on.
    Once you have enabled 2FA, your account will be updated soon to show a badge, letting other members know that you use 2FA to protect your account. This should be beneficial for everyone that uses FSFT.

need roughly 600-800 gigs...all external. help?

M

mecca

Limp Gawd
Joined
Mar 15, 2003
Messages
240
hey all,

i'm going to be delving into some serious video editing work this summer. right now i'm operating on a really nice shuttle xpc system with 3ghz and 2 gigs of ram - it's my primary editing station; fast, small, portable. however, my system is running on an 80 gig HD, which just wont cut it for video editing and i'm going to need to expand out.

what i'd like to do is get 4-5 harddrives amounting to roughly 600-800 gigs in space, enclose them in a handy external case, and connect them all via the latest firewire. now, given my necessity for speed and reliability (transferring/saving large files) and what not, can you guys recommend me the necessary hardware and particular brands i should look for in this endeavor? also, i'm guessing i'll need to connect every HD via some firewire hub to my primary system - correct?

any info would be great.
 
the other caveate is that compared to an external RAID enclosure thats using a SCSI HBA
the actual throughput to those can end up being quite limited and dependent on a number of other factors
especially in a PC as opposed to a Mac
dont mistake interface speeds for throughput
 
How much difference is there really in implementation between the two?

 
for instance my mobos firewire is hooked up via the legacy 32bit 33MHz PCI bus
bottlenecking it to 133MB/s same as IDE
any firewire card put in a "normal" desktop would be too

on the other hand if I where to connect to an external array with a SCSI host bus adapter on one of my 64bit 133MHz PCI--X slots its theoretically 1066MB/s
less for say an older 64bit 66MHz PCI slot (533MB/s) or 64bit 33MHz (266MB/s)

additional factors of course come into play, the array its talking to
but the point is that firewire 800MB/s dosnt do you any good if its bottlenecked at a normal 32bit 33MHz PCI bus


not that 133MB/s might not serve the needs (and likely would for most reasonable video editing)
Im not a Mac Addict but I think that Firewire on a Mac is on a faster bus natively
but LaCie is a Mac oriented company that I know

in pro video houses that are PC based and are dealing with realtime high res and high definition video, 133MB/s would not suffice, as to what the OP's needs are....
 
http://www.microsoft.com/windows/windowsmedia/howto/articles/UnderstandingHDFormats.aspx
(I converted from Mb/s to MB/s for continuity)


hdformats_framesize.gif



Compressed formats
720 x 480 DV 4:1:1................ 3.1MB/s
720 x 480 DV50 4:2:2............ 6.25MB/s
HD-DVCPRO.........................12.5MB/s

Uncompressed 10-bit formats
720 x 486 4:2:0......................26.25MB/s
1280 x 720/24p 4:2:0..............41.5MB/s
1280 x 720/60p 4:2:0..............102MB/s
1920 x 1080/24p 4:2:0.............93.25MB/s
1920 x 1080/60i 4:2:0.............116.5MB/s

Speed
The numbers in the previous table represent the real-world throughput needed to write a single stream of video to the hard disk in real-time. If the hard disk can't keep up with the video stream, frames of video are dropped. Many editing systems have higher requirements, because they need bandwidth to read more than one video stream at the same time for real-time effects. This kind of performance is not required for capture only. To get the kind of bandwidth required for capture, use multiple hard disks as part of a redundant array of independent disks (RAID) solution. For more information about RAID, see the "RAID" topic later in this article.
Click to expand...


so there is capture, real time editing adds alot more ;)

oh and
http://videoexpert.home.att.net/artic3/262hdvr.htm
http://www.bluefish444.com/
 
of course that just addresses the interface
actual throughput to the drives is again a function of the RAID level, the stripe width, and the controller, so you need to get figures for the RAID array itself as your planning on using it
 
LOL

now why did I think it was higher? :rolleyes:

but 100MB/s (800Mbits/s) can still limit video capture resolution and more importantly editing considerably
 
Apple introduced firewire800 on the new G5 towers...however, it's a different connector and only a few PC OEMS are actually adding them to the boards ( i think MSI has one with it).

dave
 
mashie said:
You know, FireWire is 800MBit/s so about 100MB/s. ;)

No problem for 32bit 33MHz PCI to handle it.
Click to expand...

From my experience with Firewire (400Mb version hooked between two of my PCs) it seems that the BW will be split into up/downstream. I get roughly 200Mbit/s in each direction using IP over FW. I do not know if this applies to external storage solutions or the new firewire too. If it does, realize that you have 'at most' 400Mbit/s (80MB/s).
 
You must log in or register to reply here.
Back
Top