[Ocfs2-users] mount failed with 'Device or resource busy'

[Robin Lee]

Hi,

In an OCFS2 cluster with three XenServer 7.1.1 hosts, one of it failed
to mount an OCFS2 FS.
The kernel is based on Linux 4.4.27.

mount output:
mount.ocfs2: Device or resource busy while mounting /dev/sdb on
/run/sr-mount/71ad344e-8c3e-0850-470f-6f625afbdb67. Check 'dmesg' for
more information on this error.

kernel messge:
[  905.383687] scsi host5: iSCSI Initiator over TCP/IP
[  905.398386] scsi 5:0:0:0: RAID              IET      Controller
  0001 PQ: 0 ANSI: 5
[  905.399358] scsi 5:0:0:0: Attached scsi generic sg2 type 12
[  905.403517] scsi 5:0:0:1: Direct-Access     IET      VIRTUAL-DISK
  0001 PQ: 0 ANSI: 5
[  905.404757] sd 5:0:0:1: Attached scsi generic sg3 type 0
[  905.410353] sd 5:0:0:1: [sdb] 20971520 512-byte logical blocks:
(10.7 GB/10.0 GiB)
[  905.410356] sd 5:0:0:1: [sdb] 4096-byte physical blocks
[  905.411167] sd 5:0:0:1: [sdb] Write Protect is off
[  905.411170] sd 5:0:0:1: [sdb] Mode Sense: 69 00 10 08
[  905.411719] sd 5:0:0:1: [sdb] Write cache: enabled, read cache:
enabled, supports DPO and FUA
[  905.422200] sd 5:0:0:1: [sdb] Attached SCSI disk
[  915.376485] o2net: Connected to node xxxserver-pool1 (num 0) at
192.168.58.206:7777
[  915.381648] o2net: Connected to node xxxserver-pool2 (num 1) at
192.168.58.151:7777
[  921.380352] o2net: No longer connected to node xxxserver-pool1 (num
0) at 192.168.58.206:7777
[  921.382091] o2net: No longer connected to node xxxserver-pool2 (num
1) at 192.168.58.151:7777
[  921.516900] sd 5:0:0:1: [sdb] Synchronizing SCSI cache

The LUN is an iSCSI one.

Rebooting the host does not help.

What should I do to further investigate the issue?

-robin