Product specifications

2-11
System Overview
Internal Disk Controllers
There are two internal disk controllers in the IBM 6866 system:
• A two-channel IDE controller. Both channels have the capability of
having two devices connected, however, only one channel has a
cable connected. The cable has two connectors, one connected to
the CD-ROM in drive bay 2, and an empty connector that you
could use to connect an IDE device in drive bay 1.
Avid uses the power
connector provided for
one of the drive bays to
power a fan needed to
cool the Avid board set.
• A two-channel 7899 Adaptec 160-MB Ultra3 SCSI controller:
- Channel A connects to the boot drive in drive bay 9, and also
to a combination of 1.0-inch hard drives or 1.6-inch hard
drives in drive bays 4 to 8 (see the User Guide IntelliStation Z
Pro Type 6866 Professional Workstation for specific drive
combinations). “Internal Drives and Drive Bays” on page 2-10
shows drive bay locations.
- Channel B connects to the SCSI connector on the rear of the
system. Channel B also provides a SCSI connection for drive
bay 1 shown in Figure 2-3. Channel B can be used for storing
media and connects up to a maximum of 15 SCSI devices,
including the SCSI connector in drive bay 1.
n
If you need to stripe across two channels to store media, you should not use
any SCSI devices on channel B.
n
If you have a SCSI device connected to channel B in drive bay 1, and no other
SCSI devices connected externally, you must place an active SCSI terminator
on the external SCSI connector at the rear of the system.
c
Any SCSI device placed in drive bay 1 and used by SCSI channel B
should be an Ultra3 or Ultra2 device. If you attach a single-ended
fast and wide device to SCSI bus B, the speed of SCSI bus B is
brought to that level. Avid does not recommend the use of a Jaz
®
type drive on this SCSI adapter.