Product guide
Table Of Contents
- Introduction
- Arbitrated Loop Configurations
- Fabric Configurations
- UnixWare 7 Fabric Environment
- Setup Checklist
- Verifying Symmetrix Configuration
- Verifying and Updating HBA BIOS-Level Configurations
- Scanning for the Symmetrix on an HBA BIOS Level
- Install the HBA Driver
- Changing System Configuration File Settings
- UnixWare 7 Conventions and Persistent Binding Information
- Beware of Ghost Names
- Configuring and Enabling Persistent Binding
- Troubleshooting
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Symmetrix Fibre Channel with Qlogic HBAs on UnixWare 7
Fabric Configurations
Understanding SCSI
Target Nomenclature
Setup Checklist step 8c
SCO has a limitation of 32 LUNs per target. In the HBA BIOS under
advanced settings there is a Luns per Target setting that determines
how many targets are reserved for the HBA. If the Luns per Target
setting is changed, the target numbers of all devices on that HBA will
change. Luns per Target must be set to 256.
0 to 32 luns will reserve 1 target
64 luns will reserve 2 targets
128 luns will reserve 4 targets
256 luns will reserve 8 targets
Example: In the following example, Luns per Target is set to 256. This will
reserve 8 targets per Symmetrix port. The example shows the first
HBA scanned as channel 2. Channel 2 has found two Symmetrix
ports. The QLA2200 driver reserves 8 targets (0 through 7) for the first
Symmetrix port scanned, but uses only targets 0 and 1. The driver
reserves 8 targets (8 through 15) for the second Symmetrix port
scanned, but uses only target 10.
Output of OSMLOG
The output of the osmlog can be interpreted as follows:
HBA Channel
Number Symmetrix WWN
Scan
Order
Targets
Reserved Targets Mapped
C2 50060482BBFF4DDB 1st 0,1,2,3,4,5,6,7 36 total LUNs: 32 LUNs for target
0 and 4 LUNs for target 1
C2 50060482BBFF4DDF 2nd 8,9,10,11,12,
13,14,15
5 total LUNs; 5 LUNs for target 10
C3 50060482BBFF4DDB 3rd 0,1,2,3,4,5,6,7 32 total LUNs for target 2
C3 50060482BBFF4DDF 4th 8,9,10,11,12,
13,14,15
8 targets reserved with no LUNs
for this Symmetrix port