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If I/O errors are intermittent rather than persistent, Veritas Volume Manager sets the failing flag on a disk, rather than detaching the disk. Such errors can occur due to the temporary removal of a cable, controller faults, a partially faulty LUN in a disk array, or a disk with a few bad sectors or tracks.
If the hardware fault is not with the disk itself (for example, it is caused by problems with the controller or the cable path to the disk), you can use the vxedit command to unset the failing flag after correcting the source of the
I/O error.
failing flag if the reason for the I/O errors is unknown. If the disk hardware truly is failing, and the flag is cleared, there is a risk of data loss.
To clear the failing flag on a disk
vxdisk list command to find out which disks are failing:
c1t1d0 auto:simple mydg01 mydg online
c1t1d0 auto:simple mydg02 mydg online failing
vxedit set command to clear the flag for each disk that is marked as failing (in this example, mydg02):
vxdisk list command to verify that the failing flag has been cleared:
c1t1d0 auto:simple mydg01 mydg online
c1t2d0 auto:simple mydg02 mydg online