Specifications

SCSI to SATA RAID Subsystem | Administrator’s Manual RAID Planning | en 29
Bosch Security Systems F.01U.027.802 | V1 | 2006.11
2.4 Tunable Parameters
Fine-tune the subsystem and the array parameters for your host applications. Although the
factory defaults guarantee the optimized operation, you may refer to the table below to facili-
tate tuning of your array. Some of the performance and fault-tolerance settings may also be
changed later during the preparation process of your disk array.
Use this table as a checklist and make sure you have each item set to an appropriate value.
(1) Parameters that should be configured at the initial stage of system configuration
(2) Parameters that can be changed later
(3) Non-critical
Table 2.1 Controller Parameter Settings
User-Defined
Parameters
Default Alternate Settings
Fault Management:
(1) Automatic Logical
Drive Rebuild - Spare
Drive
Enabled when
Spare Drive is
available
RAID 1 + Local Spare
RAID 3 + Local Spare
RAID 5 + Local Spare
Global Spare
(1) S.M.A.R.T. Detect Only Disabled
Perpetual Clone
Clone + Replace
(3) Clone Failing Drive Manual func-
tion
Replace After Clone
Perpetual Clone
(1) Rebuild Priority Normal Low
Improved
High
(1) Verification on
Write
Disabled On LD Initialization
On LD Rebuild
On Normal Drive Writes
(3) SDRAM ECC Enabled Disabled
(2) Periodic Cache
Flush
Disabled Continuous to 10 minutes
(1) Event Notification Reports to user
interface and
onboard alarm
Over SNMP Traps
Over Java-Based Management Software
(2) Periodic Auto-
Detect Failure Drive
Swap Check Time
5 Disabled, 5 to 60 seconds
(2) Periodic Drive
Check Time
30 Disabled, 0.5 to 30 seconds
(2) Rebuild Priority normal Low, normal, improved, high