Apple Final Cut Pro 5 - Manual (Page 187)

186 Part II Learning About the Final Cut Pro Interface
FireWire Disk Drives
While not recommended for all systems, FireWire disk drives can be effectively used to
capture and edit projects using low data rate video clips, such as those captured using
the DV codec. However, most FireWire disk drives lack the performance of internal Ultra
ATA disk drives, or of internal or external SCSI disk drives. For example, a FireWire disk
drive may not be able to support real-time playback with as many simultaneous audio
and video tracks as an internal Ultra ATA disk drive can. This can also affect the number
of simultaneous real-time effects that can be played back.
Important Information About FireWire Drives
 FireWire disk drives are not recommended for capturing high data rate material such
as uncompressed standard definition or high definition video.
 Certain DV camcorders cannot be connected to a computer while a FireWire disk
drive is connected simultaneously. In many cases, you can improve performance by
installing a separate FireWire PCI card to connect your FireWire drive.
 You may be able to improve performance by reducing the real-time video playback
data rate and the number of real-time audio tracks in the General tab of the User
Preferences window.
 You should never disconnect a FireWire disk drive prior to unmounting it from the
desktop.
SCSI Disk Drives
SCSI disk drives are among the fastest drives available. SCSI (Small Computer Systems
Interface) technology has been implemented in various ways over the years, with each
successive generation achieving better performance. Currently, the two fastest SCSI
standards for video capture and playback are:
 Ultra2 LVD (Low Voltage Differential) SCSI: Ultra2 LVD SCSI disk drives offer fast enough
performance to capture and output video at high data rates when a single disk is
formatted as a single volume (as opposed to formatting several disks together as a
disk array).
 Ultra320 and Ultra160 SCSI: These are faster than Ultra2 LVD SCSI disks.
SCSI disks can be installed internally or connected externally. Many users prefer external
SCSI disk drives because they’re easier to move and they stay cooler. If your computer
didn’t come with a preinstalled Ultra2 LVD, Ultra160, or Ultra320 SCSI disk drive, you need
to install a SCSI card in a PCI slot so you can connect a SCSI disk drive externally.
A SCSI card allows you to connect up to 15 SCSI disk drives in a daisy chain, with each
disk drive connected to the one before it and the last terminated. (Some SCSI cards
support more than one channel; multiple-channel cards support 15 SCSI disks per
channel.) Use high-quality, shielded cables to prevent data errors. These cables should
be as short as possible (3 feet or less); longer cables can cause problems. You must use
an active terminator on the last disk for reliable performance.