Xerox SAFEStor User Manual page 54

SAFEStor User Guide
Stripe Size
SCSI Channel
SCSI ID
SCSI LUN
Cache Mode
Tag Queuing
Max Sync Rate
5. When the volume set parameters are modified, press Esc to confirm. A Fast
Initialization option will be displayed.
•
Select Foreground to start Fast Initialization of the volume set.
• Select Background to start Normal Initialization of the volume set.
Each volume set can have a capacity which is less
than, or equal to, the total capacity of the raid set
on which it resides.
This parameter sets the size of the segment
written to each disk in a RAID 0, 1, 0+1, 5 or 6
logical drive. You can set the stripe size to 4 KB, 8
KB, 16 KB, 32 KB, 64 KB, or 128 KB.
Your system has two Ultra 160 or Ultra 320 SCSI
channels. Select SCSI Channel. The Select SCSI
Channel option appears. Select the channel
number and press Enter to confirm.
Each SCSI device attached to the SCSI card, as well as the
HBA card itself, must be assigned a unique SCSI ID number.
An LVD SCSI channel can connect up to 15 devices. The
Volume Set will appear as a large SCSI device. You must
assign an ID from a list of SCSI IDs. ID 7 is normally
reserved for the HBA.
Each SCSI ID can support up to 8 LUN's. Most SCSI host
adapters treat each LUN like a SCSI disk.
You can set the cache mode to: Write-Through Cache
or Write-Back Cache.
Enabling Tag-Queuing is useful for enhancing overall system
performance under multi-tasking operating systems. The
Command Tag (Drive Channel) function controls the SCSI
command tag queuing support for each drive channel. This
function should remain enabled and should only be disabled
when using older SCSI host cards that do not support
command tag queuing.
The RAID subsystem 320 MB/sec as the highest data
transfer rate for the Ultra 320 system.
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