HP StorageWorks HSG80 ACS Solution Software V8.8 for Linux X86 Installation and Configuration Guide (AA-RV1LA-TE, March 2005)

Planning a Subsystem
45HSG80 ACS Solution Software V8.8 for Linux X86 Installation and Configuration Guide
Assigning Host Connection Offsets and Unit Numbers in SCSI-2 Mode
Some operating systems expect or require a disk unit to be at LUN 0. In this case,
it is necessary to specify SCSI-2 mode.
If SCSI_VERSION is set to SCSI-2 mode, the CCL floats, moving to the first
available LUN location, depending on the configuration.
HP recommends that you use the following conventions when assigning host
connection offsets and unit numbers in SCSI-2 mode:
■ Offsets should be divisible by 10 (for consistency and simplicity).
■ Unit numbers should be assigned at connection offsets (so that every host
connection has a unit presented at LUN 0).
Table 3 summarizes the recommendations for unit assignments based on the
SCSI_VERSION switch.
Table 3: Unit assignments and SCSI_VERSION
SCSI_VERSION Offset
Unit
Assignment
What the connection sees
LUN 0 as
SCSI-2 Divisible by 10 At offsets Unit whose number matches
offset
SCSI-3 Divisible by 10 Not at offsets CCL