Adding Removable Disk Drives; Adding An Internal Scsi Peripheral Device - Intergraph StudioZ GT RAX System Reference Manual

Adding Removable Disk Drives

The system supports up to four 3.5-inch removable disk drives in the disk drive bay. Each
removable disk drive has a Single Connection Attach (SCA) connector for connection to the disk
drive bay backplane. The SCSI address of each removable disk drive is assigned by the disk drive
bay backplane.
JBOD (for "just a bunch of disks") disk drives are controlled by an integrated dual-channel Low
Voltage Differential Signaling (LVDS) Wide Ultra2 SCSI controller. The disk drive bay (and thus
each removable disk drive) is connected to the Wide Ultra2 SCSI controller via Channel B.
A single-channel RAID (for "redundant array of independent disks") controller and an optional
SCSI Activity Fault-Tolerant Enclosure (SAF-TE) card control RAID disk drives. The RAID
controller is connected to the backplane of the disk drive bay. The SAF-TE card is installed on the
disk drive bay backplane.
CAUTION Only use disk drives purchased from Intergraph in the disk drive bay. This ensures
the drives meet the disk drive bay specifications.
See Chapter 2, "Servicing the System," or System Setup for information on installing removable
disk drives in the disk drive bay.

Adding an Internal SCSI Peripheral Device

A CD-ROM drive, a floppy disk drive, and the system disk drive are installed in the peripheral
device bay. You can add an optional SCSI peripheral device to the peripheral device bay unless
one is already installed there.
Except for the floppy disk drive, integrated SCSI controllers control the devices installed in the
peripheral device bay. The CD-ROM drive is connected to the Narrow Ultra SCSI controller; the
system disk drive is connected to the Wide Ultra2 SCSI controller via Channel A. The optional
SCSI device can be connected to either controller, as appropriate for the type of device installed.
The following table describes the devices in the peripheral device bay:
Drive
Floppy disk drive
CD-ROM drive
System disk drive
Peripheral device
Access Maximum Capacity
External 3.50-inch x 1.0-inch
External 5.25-inch x 1.6-inch
Internal 5.25-inch x 1.6-inch
External 5.25-inch x 1.6-inch
SCSI Bus
N/A
Narrow Ultra SCSI
Wide Ultra2 SCSI Channel A
As appropriate for the device
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