OCFS2 Partition Fails to Mount with No Free Slots Error

This document (7005236) is provided subject to the disclaimer at the end of this document.

Environment

SUSE Linux Enterprise Server 11 (SLES11)
SUSE Linux Enterprise High Availability Extension 11 (HAE)
Oracle Cluster File System (OCFS2)

Situation

When trying to mount an OCFS2 partition, it will not mount properly. The /var/log/messages reports the following:

kernel: (6363,0):ocfs2_find_slot:496 ERROR: no free slots available!
kernel: (6363,0):ocfs2_mount_volume:1591 ERROR: status = -22

Resolution

The OCFS2 filesystem resource has been marked "dirty". A filesystem check using fsck.ocfs2 or ocfs2console will clean out the node flag in the filesystem journal, and allow the system to be mounted on the nodes again. There are two ways to perform a filesystem check.

Method 1: Command line using fsck.ocfs2

1. Make sure the filesystem resource if offline.
2. Unmount the filesystem resource.
3. Run fsck.ocfs2 to clean up the node flags.

HAE1:~ # fsck.ocfs2 /dev/sdb1

Checking OCFS2 filesystem in /dev/sdb1:
label:              <NONE>
uuid:               41 a4 d9 dc f7 b8 46 35 93 60 3a 9b 4b 25 52 ee
number of blocks:   10482412
bytes per block:    4096
number of clusters: 10482412
bytes per cluster: 4096
max slots:          2

/dev/sdb1 is clean. It will be checked after 20 additional mounts.
Slot 0's journal dirty flag removed
Slot 1's journal dirty flag removed

Method 2: Graphical using ocfs2console

1. Make sure the filesystem resource if offline.
2. Unmount the filesystem resource.
3. Run ocfs2console and highlight the file system resource.
4. Click on Tasks, then Repair.

ocfs2console Repair

Additional Information

If you have difficulties running a filesystem check, refer to TID7005238 - Cannot Perform a Filesystem Check on OCFS2

Disclaimer

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