Compaq StorageWorks HSG60 ACS Solution V8.6 for SGI IRIX Installation and Configuration Guide

3–6 HSG60 ACS Solution Software Version 8.6 for SGI Irix Installation and Configuration Guide
Fabric Device Name Convention
SGI Irix creates unique device names for devices attached to the Fabric Fibre Channel host
adapters on the system. Understanding the device nomenclature will help in providing
device name-related answers in the following section.
Format used for LUNs: /dev/rdsk/<nodeWWN>/lunzvol/cxp<portID>
NOTE: The “l” in the example is the letter “el”)
Where:
z (in lunzvol) = Logical Unit Number, LUN
x (in cxp<portID>) = controller (host Fibre Channel adapter) number assigned by host.
<nodeWWN> = worldwide name (Node ID) of HSG60 controllers (THIS and
OTHER)
<portID> = Port ID of the HSG60 controller (THIS or OTHER)
Creating the Disk Label
The disk label contains a variety of information about the storage device. Included in the
label are settings for a performance enhancement feature called Command Tagged
Queuing (CTQ). In order to utilize CTQ, it must be enabled in the disk label for each
RAID Array logical unit that is visible to the host. In the following example, CTQ is
enabled and the queue depth is set.
NOTE: To partition the device, follow the prompts and enter the answers displayed in the large
bold face italic type. The default answers are shown in ( ) braces. Press the Enter key to utilize
the default answer.
The controller number, drive number and LUN number of your drive will probably be different for
Arbitrated Loop or Fabric.
The following entries are for Arbitrated Loop only.
# fx -x
fx version 6.5, Dec 31, 2000
fx: “device-name” = (dksc)
dksc
fx: ctlr# = (0) 10
fx: drive# = (1) 64
fx: lun# = (0) 4
...opening dksc(10,64,4)
...drive selftest...OK