Proware EP-3163S-F8S6, User Manual

Page: 64 / 127

Fibre to SAS/SATA RAID Subsystem
64 User Manual
Stripe Size:
This parameter sets the size of the stripe written to each disk in a RAID 0, 1, 10, 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 two types of write caching: Write-Through and Write-Back.
Write-Through: data are both written to the cache and the disk(s) before the write
I/O is acknowledged as complete.
Write-Back: when data is written to cache, the I/O is acknowledged as complete,
and some time later, the cached data is written or flushed to the disk(s). This
provides better performance but requires a battery module support for the cache
memory, or a UPS for the subsystem.
Tagged 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 Port Mapping: The controller has four 8Gbps Fibre Host Channels (Ports 0, 1, 2,
and 3). Select the Fibre Port where to map the LUN (volume Set).
NOTE: The default Port mapping is Port 0.
NOTE: If LUN is not mapped to any Fibre Port, then LUN is disabled.
Fibre Channel: LUN Base/MNID: LUN
Controller supports Multiple Node ID (MNID) mode. A possible application is for zoning
within the arbitrated loop. The different zones can be represented by the controller's
source. Embodiments of the present invention described above can be implemented
within a Switch for FC Arbitrated Loop.
LUN Base : T h e b ase LUN number. Each LUN Base supports 8 LUNs.
LUN: Each Volume Set must be assigned a unique LUN ID number. A Fibre Port can
connect up to 128 devices (LUN ID: 0 to 127). Select the LUN ID for the
Volume Set.
Volumes To Be Created:
Use this option to create several Volume Sets with the same Volume Set attributes. Up
to 128 Volume Sets can be created.