Re: 10.0_BETA randomly panics on huge I/O on a ffs slice on ccd device

[mlelstv%serpens.de@localhost (Michael van Elst)]

joel.kachelhoffer-bertrand%gmx.fr@localhost (=?UTF-8?Q?BERTRAND_Jo=c3=abl?=) writes:

>	Hello,

>	My main server runs 10.0_BETA (that fix a lot of iscsi initiator bugs).
>[ 456386,139917] panic: ffs_blkfree: bad size: dev = 0xa805, bno =

that "just" means that the filesystem is damaged.


>	This server runs squid on a /var/squi/cache, that is a wedge on a ccd
>device :

>legendre# ccdconfig -g
>ccd0            32      0x0     2000408739840   /dev/wd0a /dev/wd1a

About 1.8TB. Can you give details about wd0a and wd1a, in particular
the sector size and number of sectors.


>** Phase 1 - Check Blocks and Sizes
>PARTIALLY TRUNCATED INODE I=23352
>SALVAGE? yes

That's a common thing after a crash as things have been partially
written.


>THE FOLLOWING SECTORS COULD NOT BE WRITTEN: 12513426624, 12513426625,
>12513426626, 12513426627, 12513426628, 12513426629, 12513426630,
>12513426631, 12513426632, 12513426633, 12513426634, 12513426635,
>12513426636, 12513426637, 12513426638, 12513426639, 12513426640,
>12513426641, 12513426642, 12513426643, 12513426644, 12513426645,
>12513426646, 12513426647, 12513426648, 12513426649, 12513426650,
>12513426651, 12513426652, 12513426653, 12513426654, 12513426655,
>THE FOLLOWING DISK SECTORS COULD NOT BE READ: 11777852800, 11777852801,
>11777852802, 11777852803, 11777852804, 11777852805, 11777852806,
>11777852807, 11777852808, 11777852809, 11777852810, 11777852811,
>11777852812, 11777852813, 11777852814, 11777852815, 11777852816,
>11777852817, 11777852818, 11777852819, 11777852820, 11777852821,
>11777852822, 11777852823, 11777852824, 11777852825, 11777852826,
>11777852827, 11777852828, 11777852829, 11777852830, 11777852831,
>CG 31239: ALLOCBLK: BAD MAGIC NUMBER
>WRITING ZERO'ED BLOCK 11777852800 TO DISK

But that's completely out of range and corrupted. I doubt that
fsck can really fix this.

You can try to dump the filesystem somewhere else, newfs and
restore.