Specifications

SCSI to SATA RAID Subsystem | Administrator’s Manual Firmware Functionality Specifications | en 187
Bosch Security Systems F.01U.027.802 | V1 | 2006.11
Global spare drive Supported, the spare drive that serves all logical drives (as
long as it is equal in size or larger than logical drive mem-
bers)
Global spare auto-assign Supported, applies to non-configured drive(s); safeguards
the array if a spare has been used in the previous array
rebuild and users forget to configure a new drive as a spare.
Co-existing dedicated and
global spare drives
Supported
Auto-rebuild onto spare drive Supported
Auto-scan of replacement
drive upon manually initiated
rebuild
Supported
One-step rebuild onto a
replacement drive
Supported
Immediate logical drive
availability
Supported;
Logical arrays are immediately ready for Host I/Os. Initializa-
tion task is completed in the background except when the
logical array is stated as “INCOMPLETE” or “BAD;” e.g., has
a failed member right after the creation.
Auto-rebuild onto failed drive
replacement
Supported. With no spare drive, the subsystem will auto-
scan the failed drive and starts rebuild automatically once
the failed drive has been replaced.
Concurrent rebuild /
expansion
Multiple logical drives can proceed with a Rebuild/Regener-
ating Parity, and/or Expansion/Initialization/Add Drive oper-
ation at the same time.
NOTE:
Regenerate Parity and Rebuild cannot take place on a logical
drive at the same time.
Create, Expand, and Add Drive operations cannot take place
on a logical drive at the same time.
Background firmware
download
Firmware can be downloaded during active I/Os.
Auto recovery from logical
drive failure
(configuration on drives)
Supported. When user accidentally removed the wrong
drive to cause the 2nd drive failure of a one-drive-failed
RAID5 / RAID3 logical drive, fatal error may occur. However,
you may force the subsystem to reaccept the logical drive by
switching off the subsystem, installing the drive back to its
original drive slot, and then power on the subsystem. The
logical drive will be restored to the one-drive-failed status.
Specification Feature
i
NOTICE!
To ensure smooth operation, sufficient cache memory buffer is required for configurations
made up of numerous logical units. An intelligent trigger mechanism is implemented with firm-
ware version 3.47 and later. If a subsystem/controller comes with a DIMM module of the size
equal or larger than 1GB, firmware automatically enlarges the maximum numbers of logical
units.