Primary disk label corrupt (Doc ID 1643847.1)

Last updated on MARCH 17, 2017

Applies to:

SPARC T5-4 - Version All Versions and later
SPARC T5-8 - Version All Versions and later
SPARC T4-1 - Version All Versions and later
SPARC T4-2 - Version All Versions and later
SPARC T4-4 - Version All Versions and later
Information in this document applies to any platform.

Symptoms

The kernel reports of a corrupt primary disk label in the messages file:

Apr  3 10:18:24 boli2 cmlb: [ID 107833 kern.warning] WARNING: /scsi_vhci/disk@g5000cca0227e4054 (sd4):
Apr  3 10:18:24 boli2   primary label corrupt; using backup
Apr  3 10:18:24 boli2 cmlb: [ID 107833 kern.warning] WARNING: /scsi_vhci/disk@g5000cca0227e4054 (sd4):
Apr  3 10:18:24 boli2   primary label corrupt; using backup
Apr  3 10:18:24 boli2 cmlb: [ID 107833 kern.warning] WARNING: /scsi_vhci/disk@g5000cca0227e4054 (sd4):
Apr  3 10:18:24 boli2   primary label corrupt; using backup


Format complains about the corrupt label:

Specify disk (enter its number)[0]: 1
selecting c0t5000CCA0227E4054d0
[disk formatted]
/dev/dsk/c0t5000CCA0227E4054d0s0 is part of active ZFS pool rpool. Please see zpool(1M).
Reading the primary EFI GPT label failed.  Using backup label.
Use the 'backup' command to restore the primary label.

Cause

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