Specifications

SCSI to SATA RAID Subsystem | Administrator’s Manual Firmware Functionality Specifications | en 189
Bosch Security Systems F.01U.027.802 | V1 | 2006.11
14.2 Advanced Features
Media Scan Supported. Verify written data on drives to avoid bad blocks
from causing data inconsistency. If bad blocks are found,
data can be reconstructed by comparing and recalculating
parity from adjacent drives (RAID1/3/5).
The “Reconstruction Writes” are followed by “Write Verifica-
tion” operation.
Bad Block Handling in
degraded mode
A method for handling low quality drives. The operation is
performed on both the logical drive in degraded mode or
that being rebuilt. If bad blocks should be encountered dur-
ing Rebuild, Add Drive, Host Write, or Regenerate Parity
operation, the controller will first attempt to reconstruct
affected data and those unrecoverable bad blocks are
stated as bad and passed to host.
Users have the option to abandon data on the unrecoverable
sectors to continue rebuild in a degraded mode.
Low quality drive handling comes with transparent resetting
of hung hard drives.
Transparent reset of hung
HDDs
Supported
Auto cache flush on critical
conditions
(caching mode dynamic
switch)
When critical conditions occur, e.g., component failure, or
BBU under charge, cached data will be flushed and the write
policy will be changed to write-through mode.
Configurable “Trigger Events” for Write-through/Write-Back
Dynamic Switch. The configuration can also be set with the
Oem “Iappend” utility.
Drive low-level format Supported
RAID parity update tracking
and recovery
Yes
Host-side Ordered Tag support Supports write commands with embedded Ordered Tags
Drive identification (flash drive
function)
Supported. Force a drive to light on its activity indicator for
users to recognize its location
Drive information listing Supported. Drive vendor name, model number, firmware
revision, capacity (blocks), serial number, narrow/wide and
current sync. speed
Drive read/write test Supported
Configuration on disks Supported. The logical drive information is recorded on
drive media. The logical drives can still be accessed if using
different Bosch RAID controllers/subsystems, e.g., drives
removed and installed in a different subsystem.
Save/ restore NVRAM to / from
disks
Supported. Save all the settings stored in the controller
NVRAM to the logical drive members
Save / restore NVRAM to /
from a file
Supported. Save all the settings stored in the controller
NVRAM to a file (via GUI manager) on user’s computer
Host-side 64-bit LBA support Supports array configuration (logical drive, logical volume,
or a partition of them) of a capacity up to 64TB.