[lkml]   [1996]   [Sep]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: Recovering from "Kernel panic: EXT2-fs panic"
      Date: 	Sun, 29 Sep 1996 14:11:03 -0500
    From: Robert Wuest <>

    I've got this 1.3 Gig SCSI drive that's about to go out. It has to warm
    up for about 30 minutes when starting cold (not kidding) and for the
    most part runs fine until a storm comes along and causes the power to
    drop. (Yes, I know, a new drive and/or a UPS would fix this). However,
    every now and then, it produces a read error and I get this panic:

    SCSI disk error : host 0 channel 0 id 0 lun 0 return code = 28000002
    Current error sd08:02: sns = f0 4
    ASC=15 ASCQ= 1
    Raw sense data:0xf0 0x00 0x04 0x00 0x22 0xef 0x75 0x28 0x00 0x00 0x00
    0x00 0x15 0x01 0x00 0x80
    scsidisk I/O error: dev 08:02, sector 1245228
    Kernel panic: EXT2-fs panic (device 08:02): ext2_read_inode: unable to
    read i-node block - inode=155765, block=622614

    Here's the meaning of thes sense key and additional info:

    | 4h | HARDWARE ERROR. Indicates that the target detected a non- |
    | | recoverable hardware failure (for example, controller failure, |
    | | device failure, parity error, etc.) while performing the command |
    | | or during a self test. |


    So it looks like your disk is quite unhappy when this occurs.

    This is a Fujitsu M2651SA on an Adaptec 2940 controller. Kernel is
    2.0.21 (although the behaviour has been the same for quite some time,
    now). System is a P/100, 48 meg RAM.

    Does the SCSI driver retry after an error? When I get an error access a
    dos partition on the same drive from within dos, I usually don't get the
    error a second time.

    The SCSI driver should indeed retry this, but if the retry does not succeed
    either, it signals the "scsidisk I/O error" you see.

    After this happens, I can't shut down clean, not even my other drives.
    It becomes a permanent error and I have to hit reset to recover my
    system. Sync locks up, init fails to init, reboot just prints it's
    message and does nothing else. Surely this doesn't have to have such
    catastrophic effects.

    This is now in the realm of the EXT2 file system code, which deals rather badly
    with a critical block that cannot be read.

    Any advice on how to clean up the error without having to reboot?

    Not really.

    There's something obviously flakey about your disk. I suggest you replace it
    as soon as possible, before it becomes completely unusable.


     \ /
      Last update: 2005-03-22 13:38    [W:8.722 / U:0.016 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site