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The S5100 storage device fails to be mounted on the Red Hat Linux server

Publication Date:  2012-07-20 Views:  184 Downloads:  0

Issue Description

1. Version:
The software version of the S5100 controller is B031.
The Linux OS is Red Hat AS4.0 up5.
The file system for partition formatting is ext3.
2. The server mounts the S5100 by the iSCSI protocol. For the detailed network, refer to the attachment.
3. After a few file systems are mounted, the data cannot be accessed and an alarm is generated on the Linux interface.

Alarm Information


Handling Process

Step 1  View the system messages, check the file systems that cannot be accessed, and check the maximum mounting times of the server. Check whether the mounting times reach the upper limit. If the mounting times have reached the upper limit, change the maximum value to avoid that the server fails to mount file systems.
Step 2  Change the maximum value of mounting times.
[root@localhost /]# tune2fs -l  /dev/sdb1 -c 70      Change the maximum value to 70.
tune2fs 1.35 (28-Feb-2004)
Setting maximal mount count to 70
Filesystem volume name:   
Last mounted on:          
Filesystem UUID:          835a6273-c631-40c5-af20-5a5fc222758f
Filesystem magic number:  0xEF53
Filesystem revision #:    1 (dynamic)
Filesystem features:      has_journal ext_attr resize_inode filetype sparse_super large_file
Default mount options:    (none)
Filesystem state:         clean
Errors behavior:          Continue
Filesystem OS type:       Linux
Inode count:              243433472
Block count:              486845692
Reserved block count:     24342284
Free blocks:              479178764
Free inodes:              243433449
First block:              0
Block size:               4096
Fragment size:            4096
Reserved GDT blocks:      1024
Blocks per group:         32768
Fragments per group:      32768
Inodes per group:         16384
Inode blocks per group:   512
Filesystem created:       Sun Jan  6 11:04:52 2008
Last mount time:          Sun Jan  6 12:24:40 2008
Last write time:          Sun Jan  6 12:30:03 2008
Mount count:              2
Maximum mount count:      70                                    Change the maximum value to 70 (the default value is 20).
Last checked:             Sun Jan  6 11:04:52 2008
Check interval:           15552000 (6 months)
Next check after:         Fri Jul  4 11:04:52 2008
Reserved blocks uid:      0 (user root)
Reserved blocks gid:      0 (group root)
First inode:              11
Inode size:               128
Journal inode:            8
Default directory hash:   tea
Directory Hash Seed:      73bd6707-3f42-4a4a-90db-8377ace2d2a6
Journal backup:           inode blocks
The mounted file systems can be normally accessed.

Root Cause

The Linux server can mount file systems up to 32 times by default. When mounting times reach the upper limit, the server fails to mount file systems and the mounted file system cannot be accessed.


It is recommended to change the default maximum value of mounting times if many file systems need to be mounted to avoid that the mounted file systems cannot be accessed.