Hi John,
This appears to be some possible HW failure. Check all diagnostic logs and
verify that everything is working without fault.
-cf
-----Original message-----
From: John White
Sent: 16/09/2011, 12:29 pm
To: lustre-discuss at lists.lustre.org
Subject: [Lustre-discuss] ldiskfs_valid_block_bitmap
Hello Folks,
We''ve been hitting a recurring issue that flips seemingly random OSTs
into read-only mode. This has happened numerous times over the last month or
two and we can''t correlate it to any back-end storage events. We
umount the OST, e2fsck and remount. e2fsck *does* find bad blocks and an e2fsck
does fix the issue on the specific LUN (unlike some bugs, ie: 23959). Any ideas
where we might start looking?
Sep 16 06:45:13 n0004.lustre LDISKFS-fs error (device dm-2):
ldiskfs_valid_block_bitmap:
Sep 16 06:45:13 n0004.lustre Invalid block bitmap - block_group = 51581, block =
1690206210
Sep 16 06:45:13 n0004.lustre kernel: LDISKFS-fs error (device dm-2):
ldiskfs_valid_block_bitmap: Invalid block bitmap - block_group = 51581, block =
1690206210
Sep 16 06:45:13 n0004.lustre
Sep 16 06:45:13 n0004.lustre kernel: Remounting filesystem read-only
Sep 16 06:45:13 n0004.lustre Remounting filesystem read-only
Sep 16 06:45:13 n0004.lustre LustreError:
6564:0:(fsfilt-ldiskfs.c:1319:fsfilt_ldiskfs_write_record()) can''t
start transaction for 37 blocks (128 bytes)
Sep 16 06:45:13 n0004.lustre LustreError:
6555:0:(fsfilt-ldiskfs.c:495:fsfilt_ldiskfs_brw_start()) can''t get
handle for 555 credits: rc = -30
Sep 16 06:45:13 n0004.lustre LustreError:
6555:0:(filter_io_26.c:690:filter_commitrw_write()) error starting transaction:
rc = -30
----------------
John White
HPC Systems Engineer
(510) 486-7307
One Cyclotron Rd, MS: 50C-3396
University of California Berkeley
Berkeley, CA 94720
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