Accusys ExaRAID GUI - Manual (Page 78)

Using the RAID GUI
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Remove LUNs in storage port
Select the LUN(s) you want to remove and click Remove. To remove all
LUNs of a virtual disk from the default storage group of fcpx/sasy/scpz,
check the ‘Remove mapping virtual disk from all storage group’ box.
• Symmetric method
Symmetric storage is used in environments where hosts are equipped with
multi-path IO (MPIO) driver or software that can handle multiple paths
(LUNs) to a single virtual disk. Use the provided PathGuard package to
install and use the MPIO driver. For more information, see 5.1 Multi-Path IO
Solutions.
HTP ID Each FC/SAS/SCSI port has a unique ID, which is
determined according to the physical location
of the port on the controller. Select one from the
drop-down menu. For iSCSI port, at least an iSCSI
target node is necessary for LUN pressented.
SCSI ID (For SCSI port)
Select a SCSI ID from the drop-down menu. A
maximum of 16 SCSI IDs can be added to the
controller.
LUN ID Select a LUN ID from the drop-down menu,
where up to a maximum of 128 LUNs can be
selected.
Mapping Virtual Disk Select a virtual disk from the drop-down menu
for LUN mapping.
Sector Size 512Byte / 1KB / 2KB / 4KB
Select a sector size from the drop-down menu as
the basic unit of data transfer in a host.
Number of Cylinder /
Number of Head /
Number of Sector Define a specific cylinder, head, and sector to
accommodate different host systems and
applications. The default is Auto.
Write Completion Write-behind: Write commands are reported as
completed when a host’s data is transferred to
the write cache.
Write-through: Write commands are reported as
completed only when a host’s data has been
written to disk.