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are these harddrive specs good for video?

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viddude
are these harddrive specs good for video?
on Jul 23, 2002 at 10:35:35 pm

this is the western digital 400BB specs: Rotational Speed 7,200 RPM (nominal)
Buffer Size 2 MB
Buffer To Disk 400.0 Mbits/s (Max)
Read Seek Time (Average) 8.9 ms
Write Seek Time (Average) 10.9 ms (average)
Track-To-Track Seek Time 2.0 ms (average)
Full Stroke Seek 21.0 ms (average)
Average Latency 4.2 ms (nominal)
Mode 5 Ultra ATA 100.0 MB/s
Mode 4 Ultra ATA 66.6 MB/s
Mode 2 Ultra ATA 33.3 MB/s
Mode 4 PIO 16.6 MB/s
Mode 2 multi-word DMA 16.6 MB/s




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John Q
Re: are these harddrive specs good for video?
on Jul 24, 2002 at 12:52:27 am

These numbers are nice and describe mostly the I/O channel electronics, which far exceed the physical transfer rate to the magnetic media. The numbers that really matter are the sustained transfer rates to and from the disk. A single DV stream requires a sustained 3.2 MBytes/second. That works out to 13 GB per hour of digital video. Most any Ultra ATA drive with a 7200 rpm spindle speed can handle it just fine. Just make sure you buy a big enough one to store your video project files.


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