Input/output error

[avizen9]

Dear friends,

i have an errror with a linux box as stated below
linux version is AS release 4 update 5
its having total 10 physicall HDD with raid 5 configure

after reboot its ok
but i would like to know the root cause.

give me some info if somebody got any clue thanks in advance.

$ cd /home
$ ls -ltr ls: reading directory .: Input/output error total 0 $ cd /opt/oracle/product $ ls -lt ls: reading directory .: Input/output error total 0 $ ls -ltr ls: reading directory .: Input/output error total 0 $ cd /opt/oracle/product $ ls -ltr ls: reading directory .: Input/output error ================================ $ cd /home/oracle $ ls -ltr total 16 ?--------- ? ? ? ? ? tbscreate2.sql ?--------- ? ? ? ? ? tbscreate2.log ?--------- ? ? ? ? ? tbscreate1.sql ?--------- ? ? ? ? ? tbscreate1.log ?--------- ? ? ? ? ? space.sql.org ?--------- ? ? ? ? ? resize_GALAXY_BACKLOG_2_IDX_L.sql ?--------- ? ? ? ? ? resizeESA_HFEI_IDX_L_PADBAMC.sql ?--------- ? ? ? ? ? afiedt.buf drwxr-xr-x 2 oracle dba 4096 May 5 2007 tools -rwxr-xr-x 1 oracle dba 382 May 5 2007 old.profile Please investigate, fix and update us as Database

[Ivan Ferreira]

>> after reboot its ok

Are you sure it's ok? At least a full fsck should be run.

I/O error, you must ensure that you hardware RAID is correct. What is your server model?

[avizen9]

its Dell PowerEdge 2950.

[avizen9]

how to check logs for this

in /var/opt/logs/?

[Ivan Ferreira]

I had a similar problem with Dell, that is why I'm asking. In that opportunity, data corruption ocurred. There is a problem with the RAID controller/disk/firmware, I don't know, but after a disk failure, this happened.

You must install Dell OpenManage to manage and check the status of your raid controller.

[avizen9]

HI
What do you mean after disk failure this happned,

if disk got any problem then when we reboot it show some error right?

after reboot its normal, also i go through boot log its not showing anyting there.

do you have any other info

i may do diagnose the server but i need to take downtime, its production server and if i am sure then only i will do.

thanks in advance for your next reply

[Ivan Ferreira · Accepted solution]

>> What do you mean after disk failure this happned,

One disk in a RAID 5 array failed.

>>> if disk got any problem then when we reboot it show some error right?

The disk should still be in failed status.

>> after reboot its normal, also i go through boot log its not showing anyting there.

If you do ls and you don't see any I/O errors, it does not mean that your data is still valid. In our case, oracle reported corrupted datafiles. Trying to copy the datafiles I/O errors where reported.

>> i may do diagnose the server but i need to take downtime, its production server and if i am sure then only i will do.

I don't know what kind of data do you have there but ensure that you are able to run a full backup.

[avizen9]

Hello
thanks for reply,
but my problem is still there..
let me know how we can check that disk or Raid controller still having problem it must throughing some error and we can check it from somewhere.

also what dignostic tool we can use for dell.

[Ivan Ferreira]

As I said previously, you must install "Dell OpenManage".

http://support.dell.com/support/downloads/download.aspx?c=us&cs=555&fileid=251548&l=en&s=biz