Specifications

192 en | Firmware Functionality Specifications SCSI to SATA RAID Subsystem | Administrator’s Manual
F.01U.027.802 | V1 | 2006.11 Bosch Security Systems
14.4 RAID Expansion
14.5 S.M.A.R.T. Support
On-line RAID expansion Supported.
Capacity brought by array expansion is immediately
ready for Host I/Os when its status changes from
“EXPAND” to “INITIALIZING.” Initialization task is then
completed in the background except when the logical
array is stated as “INCOMPLETE” or “BAD;” e.g., has a
failed member right after creation.
Mode-1 RAID expansion -add drive Supported. Multiple drives can be added concurrently.
Add Drive can even be performed in degraded mode.
Mode-2 RAID expansion – copy and
replace drives
Supported. Replace members with drives of larger
capacity.
Expand capacity with no extra drive
bays required
Supported in Mode 2 RAID expansion, which provides
“Copy and Replace Drive” function to replace drives
with drives of greater capacity. No need for hardware
upgrade, e.g., adding a new enclosure for the extra
drives.
Operating system support for RAID
expansion
No. No operating system driver required. No software
need to be installed for this purpose.
Copy & replace drive Supported. User can choose to clone a member drive show-
ing symptoms of defects before it fails.
Drive S.M.A.R.T. support Supported, with intelligent error handling implementations.
User selectable modes for
S.M.A.R.T.
• Detect only
• Perpetual Clone: using a hot-spare to clone the drive
reporting SMART errors; the hot-spare remains a clone
drive
• Clone + Replace: using a hot-spare to replace the drive
reporting SMART errors; the drive reporting errors is
pulled offline