Specifications

If you need to enable or disable a particular capability, use the following definitions
for the SCSI subsystem options:
v Bits0-2arereserved for debugging or informational-level switch.
v Bit 3 is reserved for a global disconnect or reconnect switch.
v Bit 4 is reserved for a global linked-command capability switch.
v Bit 5 is reserved for a global synchronous-SCSI capability switch.
All other bits are reserved for future use.
See Figure 52 for an example of how to specify the default SCSI options for:
v Wide SCSI
v Fast SCSI
v Tagged commands
v Synchronous-transfer linked commands
v Global parity
v Global disconnect or reconnect.
In the /etc/system file, ensure that the mask scsi_options have the following values.
For Solaris 2.4, 2.5 or higher, include the default settings in Figure 52.
See Table 19 for an example of the SCSI options.
Table 19. Example of SCSI options
Bit Mask Meaning
3 0x08 Disconnect enable
4 0x10 Linked commands enable
5 0x20 Synchronous transfer enable
6 0x40 Parity support enable
7 0x80 Command tagged queuing
8 0x100 Fast SCSI enable
9 0x200 Wide SCSI enable
Installing the IBM Subsystem Device Driver
The following instructions explain how to install the IBM Subsystem Device Driver
from a compact disc. You can use the Subsystem Device Driver in conjunction with
the IBM Copy Services command-line interface program.
1. To ensure that the volume manager is running, type: ps -ef | grep vold
The contents of the /usr/sbin/vold is displayed. If the directory is not displayed,
type: /etc/init.d/volmgt start
2. Insert the Subsystem Device Driver CD-R into the CD-ROM drive.
set scsi_options=0x3f8
Figure 52. Example of default settings for SCSI options
102 ESS Host Systems Attachment Guide