Hi,

we received error on RHEL 6.1:

dmsg:

end_request: I/O error, dev sdbb, sector 8
sd 1:0:0:0: [sdae] Device not ready
sd 1:0:0:0: [sdae] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
sd 1:0:0:0: [sdae] Sense Key : Not Ready [current]
sd 1:0:0:0: [sdae] Add. Sense: Logical unit not ready, manual intervention required
sd 1:0:0:0: [sdae] CDB: Read(10): 28 00 00 00 00 08 00 00 08 00
end_request: I/O error, dev sdae, sector 8
sd 1:0:0:2: [sdag] Device not ready
sd 1:0:0:2: [sdag] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
sd 1:0:0:2: [sdag] Sense Key : Not Ready [current]
sd 1:0:0:2: [sdag] Add. Sense: Logical unit not ready, manual intervention required
sd 1:0:0:2: [sdag] CDB: Read(10): 28 00 00 00 00 00 00 00 08 00
end_request: I/O error, dev sdag, sector 0


#lvdisplay
/dev/sda: read failed after 0 of 4096 at 0: Input/output error
/dev/sdag: read failed after 0 of 4096 at 0: Input/output error
/dev/sdr: read failed after 0 of 4096 at 0: Input/output error
/dev/sdax: read failed after 0 of 4096 at 0: Input/output error
/dev/sdc: read failed after 0 of 4096 at 0: Input/output error
/dev/sdai: read failed after 0 of 4096 at 0: Input/output error
/dev/sday: read failed after 0 of 4096 at 0: Input/output error
/dev/sdt: read failed after 0 of 4096 at 0: Input/output error
/dev/sde: read failed after 0 of 4096 at 0: Input/output error
/dev/sdu: read failed after 0 of 4096 at 0: Input/output error
/dev/sdal: read failed after 0 of 4096 at 0: Input/output error
/dev/sdbb: read failed after 0 of 4096 at 0: Input/output error
/dev/sdam: read failed after 0 of 4096 at 0: Input/output error
/dev/sdh: read failed after 0 of 4096 at 0: Input/output error
/dev/sdx: read failed after 0 of 4096 at 0: Input/output error
/dev/sdbd: read failed after 0 of 4096 at 0: Input/output error
/dev/sdi: read failed after 0 of 4096 at 0: Input/output error
/dev/sdao: read failed after 0 of 4096 at 0: Input/output error
/dev/sdz: read failed after 0 of 4096 at 0: Input/output error
/dev/sdbf: read failed after 0 of 4096 at 0: Input/output error
/dev/sdk: read failed after 0 of 4096 at 0: Input/output error
/dev/sdaq: read failed after 0 of 4096 at 0: Input/output error
/dev/sdab: read failed after 0 of 4096 at 0: Input/output error
/dev/sdm: read failed after 0 of 4096 at 0: Input/output error
/dev/sdat: read failed after 0 of 4096 at 0: Input/output error
/dev/sdae: read failed after 0 of 4096 at 0: Input/output error
/dev/sdp: read failed after 0 of 4096 at 0: Input/output error
/dev/sdav: read failed after 0 of 4096 at 0: Input/output error

what should be issue,

Sounds very familiar to other things you've posted previously:
http://www.linuxquestions.org/questi...go-4175556247/
http://www.linuxquestions.org/questi...-a-4175523655/
http://www.linuxquestions.org/questi...-a-4175518358/

...where you ask about disks and mounting. After several years now, it's odd that you're still having problems with basic troubleshooting. You also still are not providing ANY useful details about your environment (hardware? what kind of disks? attached how? real or VM server?), what you were doing before this happened, etc. Again, as you've been asked numerous times before, read the "Question Guidelines" link in my posting signature. Without details we cannot help.

And also, again, you claim to be paying for support from Red Hat...so why haven't you called Red Hat support for assistance?

Its Dell Hardware server PowerEdge R515. SAN disk uses attached with fiber cables.
This is real server not VM.

As per my investigation there is LVM configuration that have now some issues. which are pointed below errors:

#lvdisplay
/dev/sda: read failed after 0 of 4096 at 0: Input/output error
/dev/sdag: read failed after 0 of 4096 at 0: Input/output error
/dev/sdr: read failed after 0 of 4096 at 0: Input/output error
/dev/sdax: read failed after 0 of 4096 at 0: Input/output error
/dev/sdc: read failed after 0 of 4096 at 0: Input/output error
/dev/sdai: read failed after 0 of 4096 at 0: Input/output error
/dev/sday: read failed after 0 of 4096 at 0: Input/output error
/dev/sdt: read failed after 0 of 4096 at 0: Input/output error
/dev/sde: read failed after 0 of 4096 at 0: Input/output error
/dev/sdu: read failed after 0 of 4096 at 0: Input/output error
/dev/sdal: read failed after 0 of 4096 at 0: Input/output error
/dev/sdbb: read failed after 0 of 4096 at 0: Input/output error
/dev/sdam: read failed after 0 of 4096 at 0: Input/output error
/dev/sdh: read failed after 0 of 4096 at 0: Input/output error
/dev/sdx: read failed after 0 of 4096 at 0: Input/output error
/dev/sdbd: read failed after 0 of 4096 at 0: Input/output error
/dev/sdi: read failed after 0 of 4096 at 0: Input/output error
/dev/sdao: read failed after 0 of 4096 at 0: Input/output error
/dev/sdz: read failed after 0 of 4096 at 0: Input/output error
/dev/sdbf: read failed after 0 of 4096 at 0: Input/output error
/dev/sdk: read failed after 0 of 4096 at 0: Input/output error
/dev/sdaq: read failed after 0 of 4096 at 0: Input/output error
/dev/sdab: read failed after 0 of 4096 at 0: Input/output error
/dev/sdm: read failed after 0 of 4096 at 0: Input/output error
/dev/sdat: read failed after 0 of 4096 at 0: Input/output error
/dev/sdae: read failed after 0 of 4096 at 0: Input/output error
/dev/sdp: read failed after 0 of 4096 at 0: Input/output error
/dev/sdav: read failed after 0 of 4096 at 0: Input/output error

OK, did you remove or install a drive without shutting down LVM? Is one of your drives failing. Try running smartctl on each drive.

Ok, so we'll go back to your other threads you've posted over the years, where you ask about IBM Storage:
http://www.linuxquestions.org/questi...-a-4175518358/

...SAN diagnostics:
http://www.linuxquestions.org/questi...-a-4175523655/

...and a similar issue posted about previously:
http://www.linuxquestions.org/questi...go-4175556247/

So again:

• You have claimed in the past to be paying for Red Hat Enterprise support. Why have you not called them?
• Have you contacted IBM support with help with any potential SAN issues?
• Have you contacted Dell support for help with the server?
• Have you done diagnostics on whatever HBA you're using, to see if its working?
• Have you done anything to any HBA's in that volume set?

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