Re: [HPDD-discuss] Redo for recoverable error ?

Hi Adrian, Thank you for your quick response. NO I am not running snow-bird lustre with sw-raid6; All of our arrays configured with hardware raid6. I found the disk array in problem. Although I see when it remounted file system as read-only, looking into the logs before remount does not reveal anything about what went wrong. I see common processing errors but not more that I can understand to be critical enough to result in read only mounts. Remount happened a week back, attached is the copy of log file. Can you please look into and see if you notice anything unusual. ***Another quick question. My assumption is I can un-mount the OST in problem while the others are in production and run the fsck on the ost volumes. Any specific options I need to pass when I run fsck? Version of e2fsprogs we have is: e2fsprogs-1.41.10.sun2-0redhat Anything else do I need to watch out, before I bring this OST back online? Please advise. Amit -----Original Message----- From: Adrian Ulrich [mailto:adrian@blinkenlights.ch] Sent: Thursday, August 15, 2013 1:02 AM To: Kumar, Amit Cc: hpdd-discuss(a)lists.01.org Subject: Re: [HPDD-discuss] Redo for recoverable error ? ./asm-generic/errno-base.h:#define EROFS 30 mmap IO isn't your issue: It seems that (at least) one OST on your OSS got automatically remounted read-only due to a filesystem error. Older log entries on the OST should tell you what went wrong (grep remounting /var/log/messages*). The only way to recover from this is by: - umounting the affected ost(s) - run a full fsck on the volume(s) (using the latest e2fsprogs fsck) - mount the volume again IF you are sure that your storage array didn't go bananas and will not cause any new corruption (btw: are you running a 'snowbird-lustre' with linux sw-raid6?) Oh: and tell your users that they should check the return value of write() calls ;-) Regards, Adrian -- RFC 1925: (11) Every old idea will be proposed again with a different name and a different presentation, regardless of whether it works.