Table of Contents
Check paths to SAN disks after installation / modification /maintenance
Valid only on lpar with physical IO cards or on vio after running oem_setup_env
General informations
Use pcmpath command to identify topologie.
pcmpath query adapter returns number of adapter and general state of path
pcmpath query adapter
Total Dual Active and Active/Asymmetrc Adapters : 6
Adpt# Name State Mode Select Errors Paths Active
0 fscsi0 NORMAL ACTIVE 2570414022 6288 496 238
1 fscsi1 NORMAL ACTIVE 2539253749 1511 496 238
2 fscsi2 NORMAL ACTIVE 2544104628 1318 496 238
3 fscsi3 NORMAL ACTIVE 2542800951 1327 496 238
4 fscsi4 NORMAL ACTIVE 2541881089 1337 496 238
5 fscsi5 NORMAL ACTIVE 2539155490 24517 496 238
A state of NORMAL indicates that all paths are OK.
A state of DEGRADE indicates some paths to some disks have failed.
To list failed paths, use:
lspath |grep -v Enabled
To list all paths for a given hdisk, use:
lspath -l hdisk10 -F status:parent:connection|grep Enabled Enabled:fscsi0:50050763070345c8,4050401200000000 Enabled:fscsi0:50050763071845c8,4050401200000000 Enabled:fscsi0:50050763071345c8,4050401200000000 Enabled:fscsi1:50050763070305c8,4050401200000000 Enabled:fscsi1:50050763071805c8,4050401200000000 Enabled:fscsi1:50050763071305c8,4050401200000000 Enabled:fscsi2:50050763070345c8,4050401200000000 Enabled:fscsi2:50050763071845c8,4050401200000000 Enabled:fscsi2:50050763071345c8,4050401200000000 Enabled:fscsi3:50050763070305c8,4050401200000000 Enabled:fscsi3:50050763071805c8,4050401200000000 Enabled:fscsi3:50050763071305c8,4050401200000000 Enabled:fscsi4:50050763070345c8,4050401200000000 Enabled:fscsi4:50050763071845c8,4050401200000000 Enabled:fscsi4:50050763071345c8,4050401200000000 Enabled:fscsi5:50050763070305c8,4050401200000000 Enabled:fscsi5:50050763071805c8,4050401200000000 Enabled:fscsi5:50050763071305c8,4050401200000000
or
pcmpath query device 10
DEV#: 10 DEVICE NAME: hdisk10 TYPE: 2107900 ALGORITHM: Load Balance
SERIAL: 75DD2215012
===========================================================================
Path# Adapter/Path Name State Mode Select Errors
0 fscsi0/path0 CLOSE NORMAL 0 0
1 fscsi0/path1 CLOSE NORMAL 0 0
2 fscsi0/path2 CLOSE NORMAL 0 0
3 fscsi1/path3 CLOSE NORMAL 0 0
4 fscsi1/path4 CLOSE NORMAL 0 0
5 fscsi1/path5 CLOSE NORMAL 0 0
6 fscsi2/path6 CLOSE NORMAL 0 0
7 fscsi2/path7 CLOSE NORMAL 0 0
8 fscsi2/path8 CLOSE NORMAL 0 0
9 fscsi3/path9 CLOSE NORMAL 0 0
10 fscsi3/path10 CLOSE NORMAL 0 0
11 fscsi3/path11 CLOSE NORMAL 0 0
12 fscsi4/path12 CLOSE NORMAL 0 0
13 fscsi4/path13 CLOSE NORMAL 0 0
14 fscsi4/path14 CLOSE NORMAL 0 0
15 fscsi5/path15 CLOSE NORMAL 0 0
16 fscsi5/path16 CLOSE NORMAL 0 0
17 fscsi5/path17 CLOSE NORMAL 0 0
Reactivate failed path
On standalone machine or non virtualized lpar
There are two possibility to reactivate paths:
- User cfgmgr -vl fscsiX
- User smitty mpiopath / Enable Paths / Enable Selected or All Paths
On VIO
Login as padmin and run oem_setup_env to enter root level prior to use the above mentioned commands
[root@labotest]/root# ssh padmin@vios1 [padmin@vios1]/home/padmin#
Enter root level:
[padmin@vios1]/home/padmin# oem_setup_env [padmin@]/home/padmin#
Tools
Should the reactivation of paths fail or result in additional paths beeing created without activating or removing the disabled paths, you can use the clean_path.sh to delete all inactif paths.
On vio, in /home/padmin.
This script doesn't ask any question and needs no parameter. Use with care
