VST OneTrack Especificações descarregar pdf (Página 360)

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Disk Controller Card

The controller card for the hard disk is the next possible bottleneck:

● We recommend that you use a controller card connected to your computer's

PCI bus rather than to the ISA bus. A PCI card can transfer data considerably

faster than an ISA card.

Hard Disk Performance

The performance of the hard disk is probably the biggest limiting factor.

One unit of measure for a hard disk’s speed is the Average Access Time. This

should be as low as possible, and the more Tracks you plan to record on the drive,

the lower it has be. For eight stereo Tracks, you need an Average Access Time of 20

ms or less.

Many manufacturers do not specify the Average Access Time. You will then have to

check out a number of other parameters:

• Average Seek Time. This should be as low as possible.

For eight stereo Tracks at 44.1 kHz, you need an Average Seek Time of 9ms or

less.

• Rotation Speed. Sometimes indicated as Rotation Latency. The Rotation

Speed should be as high as possible, which in turn makes the Rotation La-

tency as small as possible.

For eight stereo Tracks you need a Rotation Speed of 5400rps or above, which

equals a Rotation Latency of 5.6 ms or less.

• Sustained Data Transfer Rate. This should be as high as possible.

For eight stereo Tracks you need at least 5Megabytes/second.

SCSI or E-IDE?

• In general, SCSI disks are better suited for hard disk recording than IDE drives,

for various technical reasons. However, a fast E-IDE drive is better than a slow

SCSI one.

• If you decide not to use SCSI, try to get an “Enhanced IDE” (E-IDE) drive rather

than a regular IDE one.

• If you use a SCSI or E-IDE drive, make sure it has a built in cache of at least

128 kByte, preferably 256 kByte or more.

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