HP Surestore Disk System FC10

Because of the way LUNs are distributed across controllers by HP-UX, the enable/disable controller feature of VxVM does not function as expected for the following configurations of FC10 disk systems:

• multiple daisy chained FC10 disk systems connected to a single host
• multiple FC10 disk systems connected to a single host through a hub

If the vxdmpadm disable ctlr=ctlr_name command is used for the above configurations to disable I/O through a particular controller, I/O can be stopped through paths that were not intended by the user.

If each FC10 disk system is individually connected to the host (using separate HBAs), the above mentioned feature functions correctly and as expected.

HP Surestore Disk Array FC60

Although the HP Surestore Disk Array FC60 can be used as an active/active disk array in some configurations, with VERITAS Volume Manager for HP-UX it can only be used as an active/passive disk array.

HP Surestore Disk Array XP48, XP256 and XP512

HP Surestore Disk Arrays XP48, XP256 and XP512 are supported with Dynamic Multipathing (DMP) in active/active mode. If VxVM encounters devices with identical VxVM Disk IDs, the VxVM software will give a preference to selecting the P-Vol as opposed to the S-Vol to resolve the conflict. This disk selection policy works only for microcode revisions 5244 and above.