HP StorageWorks Secure Path V2.0D Service Pack 2 for IBM AIX Release Notes (T3034-98201, May 2004)

Operating considerations
17Secure Path v2.0D Service Pack 2 for IBM AIX Release Notes
Note: The hdisks assigned to the HSG80 RAID array are in sequence with the defined
LUNS but this sequence may be interrupted by other devices that had been previously
defined in the IBM AIX system. For example, hdisk4 through hdisk8 may be assigned to
LUNs D1 through D5, hdisk9 may be another SCSI device and hdisk10 through
hdisk16 are assigned to LUNs D6 through D12.
There is no requirement that LUNs be created sequentially. For example, you can create
LUNs D1, D4, D6, and D12. The hdisk assignment (from the previous example) would
associate hdisk4 to D1, hdisk5 to D4, hdisk6 to D6 and hdisk7 to D12. If a new LUN,
D3, is created after the previously defined LUNs have been configured by IBM AIX
cfgmgr, the sequential mapping is disrupted and hdisk8 is assigned to LUN D3.
The following example shows the relationship between the hdisk and the LUN.
List the hdisks. Enter:
# lsdev –Cc disk
In the following example, the hdisk5 shows a series of numbers 2D-08-00-0,1.
The first 2 numbers 2D-08 are associated with the HBA, the last 2 numbers 0,1 are
the target, LUN designations.
# lsdev -Cc disk
hdisk0 Available 10-60-00-8,0 16 Bit SCSI Disk Drive
hdisk1 Available 30-78-00-1,0 Other SCSI Disk Drive
List the units created on the RAID storage system. This requires a serial
connection to the HSGx0 storage system or access through the SWCC client
applet.