FiruIT
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Data in SAN Drive appers and disapperas intermittently
I have two 3PAR SAN LUN’s assigned to a IBM blade working on RHEL 5.3 , Both LUN drives are mounted on drives as below
{my_data on /dev/dem-0 and my_backup /dev/dm-1}
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[root@rhel4 /]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda2 9.3G 1.8G 7.0G 21% /
/dev/sda8 3.9G 79M 3.6G 3% /tmp
/dev/sda7 9.3G 3.5G 5.3G 40% /usr
/dev/sda5 35G 12G 22G 36% /backup
/dev/sda3 42G 9.4G 31G 24% /my_db
/dev/sda1 2.0G 42M 1.8G 3% /boot
tmpfs 5.9G 34M 5.9G 1% /dev/shm
/dev/dm-0 296G 264G 17G 94% /my_data
/dev/dm-1 296G 49G 232G 18% /my_backup
**************************
Mutip[athing have been configured and is with below output
[root@rhel4 /]# multipath -ll
Cannot open /proc/sys/fs/nr_open : No such file or directory
360002ac000000000000003330
size=300G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 2:0:1:0 sde 8:64 active ready running
`- 2:0:0:0 sdc 8:32 active ready running
360002ac000000000000006660
size=300G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 2:0:1:1 sdf 8:80 active ready running
`- 2:0:0:1 sdd 8:48 active ready running
**************************
My issue is that my files in SAN drive (/my_data/db/apps_st/data)
Kindly guide what is happening to my infrastructure , any thought’s will be highly appreciated
{my_data on /dev/dem-0 and my_backup /dev/dm-1}
**************************
[root@rhel4 /]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda2 9.3G 1.8G 7.0G 21% /
/dev/sda8 3.9G 79M 3.6G 3% /tmp
/dev/sda7 9.3G 3.5G 5.3G 40% /usr
/dev/sda5 35G 12G 22G 36% /backup
/dev/sda3 42G 9.4G 31G 24% /my_db
/dev/sda1 2.0G 42M 1.8G 3% /boot
tmpfs 5.9G 34M 5.9G 1% /dev/shm
/dev/dm-0 296G 264G 17G 94% /my_data
/dev/dm-1 296G 49G 232G 18% /my_backup
**************************
Mutip[athing have been configured and is with below output
[root@rhel4 /]# multipath -ll
Cannot open /proc/sys/fs/nr_open : No such file or directory
360002ac000000000000003330
size=300G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 2:0:1:0 sde 8:64 active ready running
`- 2:0:0:0 sdc 8:32 active ready running
360002ac000000000000006660
size=300G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 2:0:1:1 sdf 8:80 active ready running
`- 2:0:0:1 sdd 8:48 active ready running
**************************
My issue is that my files in SAN drive (/my_data/db/apps_st/data)
Kindly guide what is happening to my infrastructure , any thought’s will be highly appreciated
Joshua Hopkins
Sounds like a communication problem either on the fabric side or with the internals (network interfaces, storage controller, drive connectors, or the harddrives) of the 3par system.
from the command, it shows only two paths are there to the SAN disk.
Can you give me which firmware the storage is running.
Also if you have access to 3PAR, please run the command showhost <hostname>
it will list the paths. And you have to see if the paths are via both switches.
Is the round robin policy has been set on the host side?
Can you give me which firmware the storage is running.
Also if you have access to 3PAR, please run the command showhost <hostname>
it will list the paths. And you have to see if the paths are via both switches.
Is the round robin policy has been set on the host side?
If you umount and then mount it again does the list of files change?
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