VERITAS Volume Manager 3.5 Hardware Notes (June 2002)

Hardware Requirements BETA 19 July 2002

6 VERITAS Volume Manager Hardware Notes

Note 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.

◆ EMC Symmetrix (DMP active/active)

◆ High Availability Storage System (HASS) A3311A/12A (no DMP support)

◆ HP SureStore Disk Array 12H (DMP active/active)

◆ HP High Availability Fibre Channel Disk Array Model 30/FC (DMP active/passive)

◆ HP High Availability SCSI Disk Array Model 20 (DMP active/passive)

Note Inorder toconﬁgure DMP withactive/activeperipherals,youmust haveB9116AA,

the VERITAS Volume Manager 3.5 for HP-UX, installed. Without B9116AA, you

cannot set up DMP and can only conﬁgure a single path from the host to an

active/active peripheral. Active/active peripherals cannot be conﬁgured as

active/passive.

DMP and HP Surestore Disk Arrays xp256, xp512, and xp48

HP Surestore Disk Arrays xp256, xp512, and xp48 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 will work only for

the following microcode revisions:

◆ xp256 microcode revisions 5244 and above

◆ xp512 microcode revisions 1122 and above

◆ xp48 microcode revisions 1122 and above

DMP and EMC Symmetrix Disk Array Support

The Dynamic Multipathing feature (DMP) of the Volume Manager works with the EMC

Symmetrix disk array only if the disk array is conﬁgured in the Common Serial Number

Mode. This is because only the Common Serial Number Mode conﬁguration provides

unique deviceidentiﬁcation on different paths forDMP to conﬁgureitsdatabase. Without

this mode, DMP cannot provide the multipathing functionality. DMP cannot access EMC

Symmetrix disks as individual disks with a single path it found by scanning the device

information tree in the kernel.

For the DMP functionality to work with the EMC Symmetrix disk array, the following

conditions must be met: