Specifications

186 en | Firmware Functionality Specifications SCSI to SATA RAID Subsystem | Administrator’s Manual
F.01U.027.802 | V1 | 2006.11 Bosch Security Systems
14 Firmware Functionality Specifications
14.1 Basic RAID Management
Specification Feature
RAID levels 0, 1(0+1), 3, 5, 10, 30, 50, JBOD and NRAID.
Levels 10, 30 and 50 are the multi-level RAID with the logical
volume implementations; logical volumes consist of logical
drives of different RAID levels that are striped together.
Maximum number of logical
drives
16 as default, up to 32 with a 1GB or above memory size
Maximum logical drive
capacity
64TB – when optimization mode is set to Sequential
16TB – when optimization mode is set to Random
RAID level dependency to each
logical drive
Independent. Logical drives configured in different RAID lev-
els can co-exist in a logical volume and within a RAID sub-
system
Maximum number of logical
drive members
128 - 512MB memory size
112 - 256MB memory size
Configurable stripe size 4KB, 16KB, 32KB, 64KB, 128KB, 256KB, 512KB, or 1024KB
per logical drive
• 128KB is the default for earlier firmware with optimiza-
tion for Sequential I/Os
• 32KB is the default for earlier firmware with optimiza-
tion for Random I/Os
Configurable Write Policy
(write policy per array)
Write-Back or Write-Through per logical drive. This policy
can be modified later.
Logical drive identification Unique, controller randomly generated logical drive ID;
Logical drive name user-configurable for ease of identifica-
tion in a multiple arrays configuration
Maximum number of partitions
for each logical drive
16 as default, up to 64 with a 1GB memory size
Maximum number of logical
volumes
8 as default, up to 16 with a 1GB or above memory size
Maximum number of LUNs
Mappable
Default is 128, up to 1024 with a 1GB or above memory size
Maximum number of LUNs per
host ID
Up to 32, user configurable
Maximum number of Media
Scan task schedules
16
Concurrent I/O Supported
Tag Command Queuing (TCQ) Supported
Native Command Queuing
(NCQ)
Supported
Dedicated spare drive Supported, hereby defined as the spare drive specifically
assigned to a logical drive