IBM Advanced SerialRAID Adapters SA33-3285-02 User Manual page 126

The following information is displayed for RAID-1 and RAID-10 arrays:
Status data is given for the array and for each mirrored pair of disk drives in the
array. The status values for the array are:
good
exposed
degraded
rebuilding
offline One of the following conditions exists:
unknown
The status values for mirrored pairs are:
good
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User's Guide and Maintenance Information
The status of all mirrored pairs is good.
The status of one or more mirrored pairs is exposed. No mirrored pair is
degraded.
The status of one or more mirrored pairs is degraded.
The status of one or more mirrored pairs is rebuilding. No mirrored pair is
exposed or degraded.
v The status of one or more mirrored pairs is offline.
v The first two member disk drives of the primary half are missing, and the
Split Array Resolution flag is set to Primary.
v The first member disk drive of the secondary half is missing, and the
Split Array Resolution flag is set to Secondary.
Not enough configuration data is available to determine the state of the
array. Under these conditions, ignore the primary and secondary
designations and the array-pair status.
Both member disk drives of the mirrored pair are present and working.