Accusys ExaSAN B08S2-PS - Manual (Page 91)

4. How to Use
User Guide Page 4-40
4.1.2.8.7 Unlock Drives
The RAID controller may lock abnormal drives in an array. You may unlock these drives and rejoin them
in an array. Drives may be locked under one of two conditions:
1. If a drive returns data too slowly, the controller determines the drive is experiencing a fault and
executes Drive Drop. When you unlock the drive, it will be added directly to the array if there has not
been drive access during the locked period. Otherwise, the controller will rebuild parity data on the
drive when the drive is online.
Note
If “Drive Drop" occurs, it is recommended to use S.M.A.R.T. to check the
drive condition and replace it if necessary.
2. When replacing a damaged drive with a new one, the newly added drive might be locked. Click
Unlock to allow the array to rebuild the drive. You can check the rebuild progress in the Main view.
Note
The time required for on-the-fly initialization, drive building, online expansion
and migration may vary according to the capacity of the drive and the array.
Figure 84: GUI “HDD off-line”
Follow the steps below to select a drive to unlock or change the ID.
Locked drives prevent the accidental loss of user data when drives are installed one at a time, or a RAID
member is accidentally removed while the controller is powered on. The meta-data and user data on the