VERITAS Volume Manager 3.5 Troubleshooting Guide (September 2004)

Error Messages
Kernel Warning Messages
Chapter 3
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• Description: A call made to the operating system mod_install function to load the
vxio driver failed.
• Action: Check for additional console messages that may explain why the load failed.
Also check the console messages log file for any additional messages that were
logged but not displayed on the console.
vxvm:vxio:WARNING: object plex detached from volume volume
• Description: An uncorrectable error was detected by the mirroring code and a mirror
copy was detached.
• Action: To restore redundancy, it may be necessary to add another mirror. The disk
on which the failure occurred should be reformatted or replaced.
vxvm:vxio:WARNING: object subdisk detached from RAID-5 volume at column
column offset offset
• Description: A subdisk was detached from a RAID-5 volume because of the failure of
a disk or an uncorrectable error occurring on that disk.
• Action: Check for other console error messages indicating the cause of the failure.
Replace a failed disk as soon as possible.
vxvm:vxio:WARNING: object_type object_name block offset :Uncorrectable
read error ...
vxvm:vxio:WARNING:
object_type object_name block offset :Uncorrectable
write error ...
• Description: A read or write operation from or to the specified Veritas Volume
Manager object failed. An error is returned to the application.
• Action: These errors may represent lost data. Data may need to be restored and
failed media may need to be repaired or replaced. Depending on the type of object
failing and on the type of recovery suggested for the object type, an appropriate
recovery operation may be necessary.
vxvm:vxio:WARNING: Overlapping mirror plex detached from volume volume
• Description: An error has occurred on the last complete plex in a mirrored volume.
Any sparse mirrors that map the failing region are detached so that they cannot be
accessed to satisfy that failed region inconsistently.
• Action: The message indicates that some data in the failing region may no longer be
stored redundantly.
vxvm:vxio:WARNING: RAID-5 volume entering degraded mode operation
• Description: An uncorrectable error has forced a subdisk to detach. At this point, not
all data disks exist to provide the data upon request. Instead, parity regions are used
to regenerate the data for each stripe in the array. Consequently, access takes longer
and involves reading from all drives in the stripe.
• Action: Check for other console error messages that indicate the cause of the failure.
Replace any failed disks as soon as possible.
vxvm:vxio:WARNING: read error on mirror plex of volume volume offset
offset length length
• Description: An error was detected while reading from a mirror. This error may lead
to further action shown by later error messages.