Recovering From An Nfsd Service Error - IBM Storwize V7000 Unified Problem Determination Manual

Before you begin
Use this procedure after completing the procedure in "Fibre Channel connectivity
between file modules and control enclosure" on page 34.
The Storwize V7000 Unified system can experience problems where the multipathd
failures occur. If the paths are not automatically restored, a system reboot can
recover the paths.
Important: Perform this procedure against the passive management node only.
Procedure
1. Verify that the node that the multipathd event occurred against is the passive
management node. If the node that experiences the multipathd problems is the
active node, then perform the management node failover procedure. See
"Performing management node role failover on a "good" system" on page 166.
2. Reboot the file module. See "Rebooting a file module" on page 55.
Diagnosing a multipath event
The multipath -ll command verifies that all storage devices are either active or
not active.
The following output shows that all storage devices are active.
[root@yourmachine.mgmt001st001 ~]# multipath -ll
array1_sas_89360007 (360001ff070e9c0000000001989360007) fm-0 IBM,2073-700
[size=3.1T][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=50][active]
\_ 6:0:0:0 sdb 8:16 [active][ready]
\_ round-robin 0 [prio=10][enabled]
\_ 8:0:0:0 sdg 8:96 [active][ready]
array1_sas_89380009 (360001ff070e9c0000000001b89380009) fm-1 IBM,2073-700
[size=3.1T][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=50][active]
\_ 6:0:0:2 sdd 8:48 [active][ready]
\_ round-robin 0 [prio=10][enabled]
\_ 8:0:0:2 sdi 8:128 [active][ready]
The following output shows that the storage devices are not active.
[root@kd27lf6.mgmt002st001 ~]# multipath -ll
mpathq (360050768029180b06000000000000007) dm-8 IBM,2145
size=2.5G features='1 queue_if_no_path' hwhandler='0' wp=rw
| `- 5:0:0:7 sdr 65:16 failed ready running
`- 6:0:0:7 sdi 8:128 failed ready running
mpathp (360050768029180b06000000000000005) dm-3 IBM,2145
size=2.5G features='1 queue_if_no_path' hwhandler='0' wp=rw
| `- 5:0:0:5 sdp 8:240 failed ready running
`- 6:0:0:5 sdg 8:96 failed ready running
The output [active][ready] identifies an active device. The output failed ready
running identifies a device that is not active.

Recovering from an NFSD service error

Use this procedure to recover from an NFSD service error.
About this task
This recovery procedure starts the NFSD when it is down.
Chapter 7. Recovery procedures
279