HP StorageWorks Scalable File Share User Manual
Page 279
Troubleshooting failed SFS20 arrays
9–55
•
When you reboot the affected servers, the
show array
command shows a
failed
status. Because
an array is attached to two servers, there are actually two status values, one for each server. The
following shows an example of the
show array
command:
sfs> show array 2
.
.
.
Connected to HBA/Port Status
-------------- ---------- ----------
south3 scsi-1/2 failed
south4 scsi-1/2 online
.
.
.
In this example, the
south4
server appears to show a status of
online
. There are two possible
reasons for this, as follows:
•
The
south4
server is shut down (and the status is stale). When the
south4
server is rebooted,
check the status again. If both servers now report a
failed
status, the fault is in the SFS20
storage array.
•
The
south4
server is running normally and the SFS20 storage array is responding. In this case,
there may be a fault in the UltraSCSI cable connecting the
south3
server with the SFS20
storage array.
•
If you created MDS or OST services that were mirrored across two arrays, the MDS or OST service
can continue to run when one of the SFS20 arrays involved has failed. However, the service is
running in
degraded
mode. The
show filesystem
command shows if an MDS or OST service is
running in
degraded
mode, as shown in the following example:
sfs> show filesystem
Name State Services
------ -------------- ----------------------------------
data started mds8: running(raid: degraded), ost[29-30]: running
•
If the SFS20 array contains a service LUN, when you reboot the affected servers they are unable to
access the service LUN. The result differs depending on whether the array is attached to the
administration and MDS servers or to a pair of Object Storage Servers, as follows:
•
If the array is attached to the administration and MDS Servers, the
sfsmgr
(8) command reports
that the database is unavailable.
•
If the array is attached to a pair of Object Storage Servers, the servers boot, but the
show
server
command reports that the servers are not configured, as shown in the following
example:
sfs> show server
Name State Power Services
---------- -------------- -------- ----------
south1 running on admin
south2 running on mds7
south3 not-configured on
south4 not-configured on
Use the
show lun
command to confirm that the failed array contains a service LUN for the server
pair, as shown in the following example:
sfs> show lun
.
.
.
LUN Array Role Used by Size(GB) Preferred Server Visible to
--- ----- ----- ---------- -------- ---------------- ----------
.
.
.
17 2 service south3 1 - south[3-4]
.
.
.