On Tue, 2004-01-27 at 13:39, Florian Huber wrote: > On Tue, 2004-01-27 at 20:28, Dave Kleikamp wrote: > > I wonder if JFS is having trouble getting the partition size. Can you > > run jfs_fsck with the -v flag to see what part of the superblock it > > doesn't like? > > The current device is: /dev/md2 > Open(...READ/WRITE EXCLUSIVE...) returned rc = 0 > Incorrect jlog length detected in the superblock (P). > Incorrect jlog length detected in the superblock (S). > Superblock is corrupt and cannot be repaired > since both primary and secondary copies are corrupt.
My guess is that software raid is stealing a few blocks from the end of the partition, and JFS doesn't like that, since it's journal goes all the way to the end. I've created a patch that will shorten the journal if it can safely be done. It was built against the latest jfsutils cvs tree, but applies to version 1.1.4: http://www10.software.ibm.com/developer/opensource/jfs/project/pub/jfsutils-1.1.4.tar.gz Please let me know if this fixes it. (lkml: Yeah, I know the code is indented too far. It's outside the kernel, so give me a break.) Index: jfsutils/fsck/fsckmeta.c =================================================================== RCS file: /usr/cvs/jfs/jfsutils/fsck/fsckmeta.c,v retrieving revision 1.18 diff -u -p -r1.18 fsckmeta.c --- jfsutils/fsck/fsckmeta.c 17 Dec 2003 20:28:47 -0000 1.18 +++ jfsutils/fsck/fsckmeta.c 27 Jan 2004 20:27:56 -0000 @@ -2124,9 +2124,34 @@ int validate_super(int which_super) } agg_blks_in_aggreg += jlog_length_from_pxd; if (agg_blks_in_aggreg > agg_blks_on_device) { + int64_t short_blocks; + uint32_t new_jlog_size; /* log length is bad */ vs_rc = FSCK_BADSBFJLL; - fsck_send_msg(fsck_BADSBFJLL, fsck_ref_msg(which_super)); + /* Let's try to fix it. :^) */ + short_blocks = agg_blks_in_aggreg - + agg_blks_on_device; + new_jlog_size = (jlog_length_from_pxd - + short_blocks) * + sb_ptr->s_bsize; + /* logform likes multiples of 16K */ + new_jlog_size &= 0xfffffC000; + /* Don't let it go below 1/2 MB */ + if (new_jlog_size > (1 << 19)) { + printf("The volume seems to have shrunk by %Ld blocks.\n" + "Will attempt to fix.\n", + short_blocks); + jlog_length_from_pxd = + new_jlog_size / + sb_ptr->s_bsize; + PXDlength(&(sb_ptr->s_logpxd), + jlog_length_from_pxd); + vs_rc = ujfs_put_superblk( + Dev_IOPort, sb_ptr, 1); + } + if (vs_rc) + fsck_send_msg(fsck_BADSBFJLL, + fsck_ref_msg(which_super)); } } } -- David Kleikamp IBM Linux Technology Center _______________________________________________ Jfs-discussion mailing list [EMAIL PROTECTED] http://www-124.ibm.com/developerworks/oss/mailman/listinfo/jfs-discussion
