HP-UX Virtual Partitions Administrator Guide (includes A.05.08) (5900-1312, March 2011)

Examples
• To add all hardware using the SBA/LBA hardware path of 1/2 to an existing partition
winona2:
winona1# vparmodify -p winona2 -a io:1.2
• To remove all hardware with SBA/LBA 1/2 from partition winona2:
winona1# vparmodify -p winona2 -d io:1.2
NOTE: The virtual partition must be in the down state to add or delete I/O resources.
I/O: Allocation Notes
When planning or performing I/O allocation, note the following:
• Mass Storage Stack Formats
The agile view of mass storage introduced in HP-UX 11i v3 (11.31) is supported with vPars.
However, the lunpath hardware path format and lun hardware path format are not supported
for use on the vPars command line, and are not printed by any vPars commands. You must
continue to use the legacy hardware path format that existed in previous vPars releases when
using the vPars commands; for HP-UX 11i v3 (11.31), ioscan’s default output will continue
to show the legacy format.
However, wherever the new formats are supported by other 11.31 HP-UX commands and
tools, you can use these new formats within the virtual partitions running 11.31. For information
on using the new mass storage stack formats, multipathing, and agile addressing, see the
white paper The Next Generation Mass Storage Stack and the manual HP-UX System
Administrator's Guide: Overview.
When using HP-UX commands in the agile view to affect boot paths, such as with the setboot
command, vPars requires a corresponding legacy hardware path to exist. When planning
your system configuration you should be aware that there will be no legacy hardware paths
in the following cases, due to limitations in the minor number format of legacy device special
files:
◦ you have more than 255 I/O busses
◦ you have more than 32,768 LUNs. Note that for the first release of 11.31, only up to
16,384 LUNs are supported and for 11.23, only up to 8192 LUNs are supported.
• An LBA can be assigned to at most one virtual partition at any given time.
When you are planning your I/O to virtual partition assignments, note that only one virtual
partition may own any hardware at or below the LBA (Local Bus Adapter) level. In other words,
hardware at or below the LBA level must be in the same virtual partition.
Example
Looking at the ioscan output of a rp7400/N4000, the two internal disk slots use the same
LBA:
0/0 ba Local PCI Bus Adapter (782)
0/0/2/0 ext_bus SCSI C875 Ultra Wide Single-Ended
0/0/2/1 ext_bus SCSI C875 Ultra Wide Single-Ended
Therefore, you cannot assign one of the internal disks to partition vpar1 and the other internal
disk to partition vpar2; these disks must reside in the same partition.
• Syntax Notes
When specifying only the SBA on the command-line, the vPars commands will assume the
change applies to all LBAs under the specified SBA.
The exception are boot disks; boot disks are specified using the full legacy hardware path.
174 CPU, Memory, and I/O Resources (A.05.xx)