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

Avoiding problem situations
20 Secure Path v2.0D Service Pack 2 for IBM AIX Release Notes
Avoiding problem situations
Sequence of removing hdisks and adapters
If it becomes necessary to remove the HBA from the host computer it is
recommended that the hdisks be removed first and independently of the adapters.
Attempting to remove both the hdisks and the adapters using
rmdev –Rdl scsix can cause a system freeze in some instances, forcing a
reboot.
Connection offsets
The HSG controller ACS allows for connection offsets. If you use connection
offsets with AIX, set the same offset value on both connections to the AIX HBA
pair.
Create only two paths to a RAID storage unit
EVA requires that a port from each controller be connected into each fabric. Refer
to the section “Setting UP Switches and Zoning” in Appendix B of the HP
StorageWorks Secure Path v2.0D for IBM AIX Installation Guide for information
about switch zoning in an EVA environment.
Secure Path v2.0D Service Pack 2 for IBM AIX requires that only one path per
HBA exists from the server to a LUN on the RAID storage system.
Viewing LUNs after running cfgmgr
If you run cfgmgr and can see the adapters but not the LUNs, set your DMA size
to 64MB by entering the following commands:
# rmdev -l scsi4
scsi4 Defined
# chdev -l scsi4 -a dma_window=64M
scsi4 changed
# mkdev -l scsi4