Proware DP-503-F4A3, Installation And User Manual

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DP-503-F4A3 RAID SUBSYSTEM
50 Installation and User Manual
Raid Level:
Set the RAID level for the Volume Set. Click the down-arrow in the drop-down list. The available
RAID levels for the current Volume Set are displayed. Select the preferred RAID level.
Capacity:
The maximum Volume Set size is displayed by default. If necessary, change the Volume Set size
appropriate for your application.
Greater Two TB Volume Support:
No : Volume Set size is set to maximum 2TB limitation.
64bit LBA : Use this option for UNIX, Linux, and Windows Server 2003 + SP1 or later versions. The
maximum Volume Set size is up to 512TB.
4K Block : Use this option for Windows OS such as Windows 2000, 2003, or XP. The
maximum Volume Set size is 16TB. Just use the Volume as “Basic Disk”. Volume can’t be used
as “Dynamic Disk”; also can’t be used in 512Bytes block service program.
Initialization Mode:
Set the Initialization Mode for the Volume Set. Foreground mode is completed faster but Volume Set
but be completed before it becomes accessible. Background mode makes the Volume Set available
instantly but the initialization process takes longer.
Stripe Size:
This parameter sets the size of the stripe written to each disk in a RAID 0, 1, 0+1, 3, 5 or 6
Volume Set. You can set the stripe size to 4 KB, 8 KB, 16 KB, 32 KB, 64 KB, or 128 KB.
A larger stripe size produces better-read performance, especially if your computer does mostly
sequential reads. However, if you are sure that your computer does random reads more often,
select a small stripe size.
NOTE: Stripe Size in RAID level 3 can’t be modified.
Cache Mode:
The RAID subsystem supports Write-Through Cache and Write-Back Cache.
Write-Through: the RAID controller acknowledges data has been received when it reaches the
disk drives.
Write-Back: the RAID controller acknowledges data has been received when it reaches the
controller’s cache memory. This provides better performance but requires a battery module
support for the cache memory, or a UPS to connect the RAID system.
Tag Command Queuing:
When this option is enabled, it enhances the overall system performance under multi-tasking
operating systems by reordering tasks or requests in the command queue of the RAID system. This
function should normally remain enabled.
Fibre Channel/LUN Base/LUN:
Fibre Channe l: There are two 4Gbps Fibre Host Channels in the RAID subsystem. Select the
Fibre Channel port where to map the LUN (Volume Set). Options are: 0 , 1 and 0&1 Cluster . 0 &
1 Cluster will make the LUN visible on both FC ports.
LUN Base : The base LUN number. Each LUN Base supports 8 LUNs.