how to remove failed/unmapped disk in RHEL AS 4

[Jdamian]

Hi

dmesg and /var/log/messages show a lot of the following error message:

Buffer I/O error on device sdaw, logical block 0
end_request: I/O error, dev sdaw, sector 0

It always refers to device /dev/sdaw.
Powermt command reports

# powermt display dev=sdaw
Bad dev value sdaw, or not under Powerpath control

And "fdisk -l /dev/sdaw" shows nothing.

I guess that underlying LUN was unmapped.

How can I remove that failed/unmapped disk device file?

Thanx in advance

[Michal Kapalka (mikap)]

hi,

check the powermt command :

powermt display dev=all |more

powermt check

this should check if some HW path and disk attached are in failed state.

powermt config

powermt save

check the powermt swiches before you are start using it. ( for safety of course )

mikap

[Matti_Kurkela · Accepted solution]

echo 1 > /sys/block/sdaw/device/delete

MK

[Jdamian]

thank you