Summary
Volume Manager 5.0 introduced a unique identifiers for  disks (UDID) which allow source and cloned (copied) disks to be differentiated. If a disk and its clone are presented to Volume Manager, devices will be flagged as udid_mismatch in vxdisk list .

Three  issues have been identified with the udid_mismatch state which can compromise disk group integrity:

Problem 1 - Abstract "vxdisk updateudid after udid_mismatch could lead to dg config mess up" (Internal ref e936419)

The disk group configuration is not completely updated during the updateudid operation.

At risk: Systems where the commands " vxdisk updateudid " or " vxdg ... updateid " are executed.

The issue has been fixed in the following patches:

 

OS	Volume Manager Patch
Solaris SPARC	5.0MP1-RP4
Solaris x64	5.0RP1
Linux	5.0MP1-RP1
Linux	5.0MP2-RP1 (MP2 does not contain fix)
AIX	5.0MP1-RP3
HPUX 11iv2	5.0MP1-RP2 (PHCO_37086, PHKL_37087)
HPUX 11iv3	5.0-RP3

The patch for HPUX is available from HP IT resource centre.

Problem 2 - Abstract "Updateudid cmd on an imported dg disk could render the dg unimportable later" (Internal ref e1150313)

The disk media records are not updated correctly during the " updateudid " operation.

At risk: Systems where the command " vxdisk updateudid " will be executed on disks that are part of an imported disk group.

The issue has been fixed in the following patches:

 

OS	Volume Manager Patches
Solaris SPARC	5.0MP1-RP4
Solaris x64	5.0RP1
Linux	5.0MP1-RP1+HOTFIX
Linux	5.0MP2-RP1+HOTFIX
AIX	5.0MP1-RP3
HPUX 11iv2	5.0MP1-RP2+HOTFIX
HPUX 11iv3	5.0-RP3

 

Problem 3 - Abstract "vxdisk 'updateudid' is corrupting diskid. Import of diskgroup fails." (internal ref e1532363)

The disk media records are not updated correctly during the "updateudid" operation.

At risk: Systems where the command "vxdisk updateudid" will be executed on disks that are part of an imported disk group.

The issue has been fixed in the following patches, by removing the ability to run "updateudid" on imported diskgroups:

 

OS	Volume manager Patches
Solaris SPARC	5.0MP3RP2
Linux	5.0MP3RP3
AIX	5.0MP3RP2
HPUX 11iv2	5.0MP2+HOTFIX4

Please contact Veritas Enterprise Support to obtain the hot fixes mentioned above.