HP StorageWorks MSA 2.8 SAN Switch - Manual (Page 149)

Updating Switches to the Core PID Addressing
149 Fabric OS Procedures Version 3.1.x/4.1.x User Guide
Make List of Manually Configurable PID Drivers
Some device drivers do not automatically bind by PID, but allow the operator to
manually create a PID binding. For example, persistent binding of PIDs to logical
drives may be done in many HBA drivers. Make a list of all devices that are
configured this way. If manual PID binding is in use, consider changing to WWN
binding.
The following are some of the device types that may be manually configured to
bind by PID:
■ HBA drivers (persistent binding)
■ RAID arrays (LUN access control)
■ SCSI bridges (LUN mapping)
Analyzing Data
Once you have determined the code versions of each device on the fabric, they
must be evaluated to find out if any automatically bind by PID. It may be easiest to
work with the support providers of these devices to get this information. If this is
not possible, you may need to perform empirical testing.
Note: Binding by PID can create management difficulties in a number of scenarios. It is
recommended that you not use drivers that do not bind by PID. If the current drivers do
bind by PID, upgrade to WWN-binding drivers, if possible.
The drivers shipping by default with HP/UX and AIX at the time of this writing
still bind by PID, and so detailed procedures are provided for these operating
systems in this chapter. Similar procedures can be developed for other operating
systems that run HBA drivers that bind by PID.
Note: There is no inherent PID binding problem with either AIX or HP/UX. It is the HBA
drivers shipping with these operating systems that bind by PID. Both operating systems
are expected to release HBA drivers that bind by WWN, and these drivers may already
be available through some support channels. Work with the appropriate support
provider to find out about driver availability.