IBM Advanced SerialRAID Adapters SA33-3285-02 User Manual page 483

17. (from step 4)
A RAID-5 array is in the Exposed state when one member disk drive of the array is
not available to the array. A RAID-1 or RAID-10 array is in the Exposed state when
one or more mirrors are exposed. A mirror is exposed when one disk drive in the
mirror pair is not available to the array.
If the missing disk drives are returned to the array, the array enters the Good
state. No data rebuilding is necessary. If data is written to an array that is in the
Exposed state, that data is not protected, and the array goes into the Degraded
state (see Chapter 3, "RAID Functions and Array States" on page 29 for more
information). Command line parameters are available that allow you to prevent
such write operations.
a. Type
b. Select Change/Show Use of an SSA Physical Disk.
The status of the disk drives that are connected to the using system is
displayed.
c. Go to step 18 on page 464.
and press Enter.
Chapter 18. SSA Problem Determination Procedures
463