Digital Equipment VAXstation 3100 Maintenance Manual page 192

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Operating Information 171
SCSI-B bus and are both
fixed
disks. DKB400 is the RRD40 compact disc
at address ID 4 on the SCSI-B bus and displays that it is a read-only disk
(RODISK), removable media (RM), and is write-protected
(WP).
The second
HostID is the address ID of the SCSI-B controller
(ID
6).
The VS 3100 systems include the following devices:
• DKAx00
1 -
RZ22, RZ23, or RZ55 on SCSI-A bus
• DKBx00
1 -
RZ22, RZ23, or RZ55 on SCSI-B bus
• DUA2 - RX23 in system box on model 30 systems only
• ESAO - Ethernet booting device.
• MKAx.00
1 -
Tape drive on SCSI-A bus
• MKBx00
1
-Tape drive on SCSI-B bus
If no device name is specified when entering the BOOT command, the system
checks NVR for a default device and boots off that device. If no device is
stored in NVR, the system automatically assigns ESAO as the boot device
and sends out a boot inquiry over the Ethernet once every 30 seconds for
5 minutes. If no host responds within the first 5 minutes, the system waits
for 5 minutes. The system then starts sending a boot inquiry again every 30
seconds for 5 more minutes. This pattern is repeated until a host boots the
node or until you press the halt button.
7.2 The RRD40 Compact Disc Drive
The RRD40 is available as a tabletop version (expanion box) or a half-height
version in the model 40's system box. Figure 7-2 and Figure 7- 3 show the
two RRD40 drives. Operating the drive is the same regardless of the location
of the RRD40 drive.
1
The x indicates the SCSI
address
ID of the drive (0 to 7)