HSM (SAM-QFS): Reservation Conflict (Fencing) Preventing Disk LUNs In a Clustered Environment From Mounting or Mounted Read-Only
(Doc ID 1617319.1)
Last updated on MARCH 28, 2024
Applies to:
Oracle Hierarchical Storage Manager (HSM) and StorageTek QFS Software - Version 5.0 and laterInformation in this document applies to any platform.
Symptoms
In some occasions it can occur that after a cluster node reboot or a restart of some cluster resources, some or all of the SAMFS type filesystems fail to mount correctly or mount in read-only mode. In several of these occasions this was caused by the cluster framework putting scsi-reservations on the data luns and thus preventing another node or a QFS client outside the cluster (COTC) from accessing these LUN's correctly.
The following entries may be seen in /var/adm/messages on the client:
Changes
Cause
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In this Document
| Symptoms |
| Changes |
| Cause |
| Solution |
| default_fencing |
| localonly |