Veritas Volume Manager 5.0 Troubleshooting Guide Guide (September 2006)

Contents
Chapter 1 Recovery from hardware failure
Listing unstartable volumes ......................................................................................10
Displaying volume and plex states ...........................................................................10
Understanding the plex state cycle ...........................................................................11
Recovering an unstartable mirrored volume .............................................................13
Recovering an unstartable volume with a disabled plex in the RECOVER state .....14
Forcibly restarting a disabled volume .......................................................................15
Clearing the failing flag for a disk ............................................................................15
Reattaching failed disks ............................................................................................16
Failures on RAID-5 volumes ....................................................................................17
System failures ..................................................................................................17
Disk failures ......................................................................................................17
Default startup recovery process for RAID-5 ..................................................19
Recovering a RAID-5 volume ..........................................................................19
Recovery after moving RAID-5 subdisks .........................................................22
Starting RAID-5 volumes .................................................................................23
Recovering from incomplete disk group moves .......................................................25
Recovery from failure of a DCO volume .................................................................27
Recovering a version 0 DCO ............................................................................29
Recovering a version 20 DCO ..........................................................................30
Chapter 2 Recovery from failure of instant snapshot operations
Failure of vxsnap prepare .........................................................................................31
Failure of vxsnap make for full-sized instant snapshots ...........................................32
Failure of vxsnap make for break-off instant snapshots ...........................................32
Failure of vxsnap make for space-optimized instant snapshots ................................32
Failure of vxsnap restore ...........................................................................................33
Failure of vxsnap reattach or refresh ........................................................................33
Copy-on-write failure ...............................................................................................33
I/O errors during resynchronization ..........................................................................34
I/O failure on a DCO volume ...................................................................................34
Chapter 3 Recovery from boot disk failure
Recovery by booting from a VxVM root disk mirror ...............................................35
Recovery by booting from recovery media ..............................................................36