mount 一个 ocfs2 格式的设备文件到一个目录下失败

在mount  （mount dev/disk/sdx /root/admin/mnt ）一个 ocfs2 格式的设备文件到一个目录下时失败， 提示 ： 

mount.ocfs2: Invalid argument while mounting /dev/sdx on /root/admin/mnt. Check 'dmesg' for more information on this error. 

这个设备文件是一个3PAR 上面 原有共享文件系统的一个3PAR VV 的读写快照 。 

dmesg 信息显示如下 ： 

[10251873.633199] sd 1:0:1:11: [sdw] 34359738368 512-byte logical blocks: (17.6 TB/16.0 TiB) [10251873.633253] sd 1:0:1:11: [sdw] Write Protect is off [10251873.633254] sd 1:0:1:11: [sdw] Mode Sense: 8b 00 10 08 [10251873.633350] sd 1:0:1:11: [sdw] Write cache: disabled, read cache: enabled, supports DPO and FUA [10251873.633474] sd 1:0:1:11: [sdw] Optimal transfer size 16777216 bytes [10251873.635973] sd 1:0:1:11: [sdw] Attached SCSI disk [10251873.641037] sd 16:0:0:11: alua: port group 00 state A preferred supports tolusnA [10251873.641722] sd 16:0:0:11: [sdx] 34359738368 512-byte logical blocks: (17.6 TB/16.0 TiB) [10251873.641771] sd 16:0:0:11: [sdx] Write Protect is off [10251873.641771] sd 16:0:0:11: [sdx] Mode Sense: 8b 00 10 08 [10251873.641863] sd 16:0:0:11: [sdx] Write cache: disabled, read cache: enabled, supports DPO and FUA [10251873.641968] sd 16:0:0:11: [sdx] Optimal transfer size 16777216 bytes [10251873.644414] sd 16:0:0:11: [sdx] Attached SCSI disk [10251873.653104] sd 16:0:1:11: [sdy] 34359738368 512-byte logical blocks: (17.6 TB/16.0 TiB) [10251873.653158] sd 16:0:1:11: [sdy] Write Protect is off [10251873.653159] sd 16:0:1:11: [sdy] Mode Sense: 8b 00 10 08 [10251873.653247] sd 16:0:1:11: [sdy] Write cache: disabled, read cache: enabled, supports DPO and FUA [10251873.653360] sd 16:0:1:11: [sdy] Optimal transfer size 16777216 bytes [10251873.655731] sd 16:0:1:11: [sdy] Attached SCSI disk [10251906.745057] (mount.ocfs2,51120,4):ocfs2_initialize_super:2347 Disk lock switch: off [10251906.745072] (mount.ocfs2,51120,4):ocfs2_initialize_super:2349 Disk lock is supported [10251906.745073] (mount.ocfs2,51120,4):ocfs2_initialize_super:2359 Disk (sdx) write same support: yes [10251906.745074] (mount.ocfs2,51120,4):ocfs2_initialize_super:2362 Disk (sdx) write same switch: on [10251906.745075] (mount.ocfs2,51120,4):ocfs2_initialize_super:2369 Disk (sdx) fence scsi support: no [10251906.745075] (mount.ocfs2,51120,4):ocfs2_initialize_super:2372 Disk (sdx) fence scsi switch: off [10251906.751954] (mount.ocfs2,51120,4):ocfs2_fill_super:1133 ERROR: Unable to create per-mount debugfs root. [10251906.751960] (mount.ocfs2,51120,4):ocfs2_dismount_volume:1946 0C38D73F073743C4AE087310BC5D3FFB: Beginning to umount device on (node 0). [10251906.751970] ocfs2: Unmounting device (65,112) on (node 0) [10251906.751992] (mount.ocfs2,51120,4):ocfs2_fill_super:1254 ERROR: status = -22