Specifications

SCSI to SATA RAID Subsystem | Administrator’s Manual RAID Functions: Introduction | en 17
Bosch Security Systems F.01U.027.802 | V1 | 2006.11
1.5 Rebuild
1.5.1 Automatic Rebuild
Fig. 1.13 Automatic Rebuild
Rebuild with Spare: When a member drive in a logical drive fails, the controller will first exam-
ine whether there is a Local Spare Drive assigned to this logical drive. If yes, rebuild is auto-
matically started.
If there is no Local Spare available, the controller will search for a Global Spare. If there is a
Global Spare, rebuild automatically begins using the Global Spare.
Failed Drive Swap Detected: If neither a Local Spare Drive nor Global Spare Drive is available,
and the "Periodic Auto-Detect Failure Drive Swap Check Time" is "Disabled," the controller will
not attempt to rebuild unless the user applies a forced-manual rebuild.
When the "Periodic Auto-Detect Failure Drive Swap Check Time" is "Enabled" (i.e., a check time
interval has been selected), the controller will detect whether a faulty drive has been
swapped (by checking the failed drive's channel/ID). Once the failed drive has been replaced
with a healthy drive, the rebuild will begin immediately.
If the failed drive is not swapped but a local spare is added to the logical drive, rebuild will
begin with the spare.
If the S.M.A.R.T. function is enabled on drives and the reaction scheme is selected for secur-
ing data on a failing drive, the spare will also be used for restoring data.