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    SubjectRe: ext2 filesystem corruption?!?!??
    On Thu, 3 Apr 1997, Doug Ledford wrote:

    > I agree, but so far we haven't limited things down very much. One extremely
    > important thing I think people need to keep in mind is the following. Your
    > choice of low-level controller driver for the attached hard drives can greatly
    > impact this problem. I had a machine with an IDE drive and a Triton II
    > chipset. When I enabled the Triton DMA support, I would get corruption,
    > reliably, and under light load even. When I disabled the special drivers, my
    > corruption went away. The same could very well be true of SCSI drivers (you
    > could end up getting corruption if you use the PAGE_ENABLE flag in the aic7xxx
    > driver, or possibly some other scsi controllers, but I wouldn't know about
    > them). I think people who are reporting filesystem corruption under ext2 fs
    > need to start also reporting the hard drive controller and driver in use so
    > some of us can look for any patterns in what's happening.

    Yes, of course. I'm sorry; I should have included more information. Here
    it is (I hope the problem is just a driver issue :)

    express:/proc/scsi$ cat scsi
    Attached devices:
    Host: scsi0 Channel: 00 Id: 00 Lun: 00
    Vendor: SEAGATE Model: ST31200N SUN1.05 Rev: 8722
    Type: Direct-Access ANSI SCSI revision: 02
    Host: scsi0 Channel: 00 Id: 01 Lun: 00
    Vendor: SEAGATE Model: ST12550N Rev: 0013
    Type: Direct-Access ANSI SCSI revision: 02
    Host: scsi0 Channel: 00 Id: 02 Lun: 00
    Vendor: SEAGATE Model: ST15150W Rev: 0020
    Type: Direct-Access ANSI SCSI revision: 02
    Host: scsi0 Channel: 00 Id: 03 Lun: 00
    Vendor: SEAGATE Model: ST15150W Rev: 0023
    Type: Direct-Access ANSI SCSI revision: 02
    Host: scsi0 Channel: 00 Id: 05 Lun: 00
    Vendor: HP Model: T4000s Rev: 1.06
    Type: Sequential-Access ANSI SCSI revision: 02

    SCSI Adapter:

    BusLogic BT-956C
    Bus 0, device 14, function 0:
    SCSI storage controller: BusLogic MultiMaster (rev 6).
    Fast devsel. IRQ 11. Master Capable. Latency=240.
    I/O at 0x6000.

    The drive arrangement is different than I thought (I'm not the sysadmin,
    sadly, so I'm doing this in my spare time).

    Filesystem 1024-blocks Used Available Capacity Mounted on
    /dev/sda2 932549 344980 539390 39% /
    /dev/sdb1 2020873 1240275 676151 65% /home
    /dev/sdc1 4052132 3267785 574701 85% /var/spool/dnews
    /dev/sdd1 4052132 3361956 480530 87% /var/spool2


    /var/spool2 is running a small caching server, for experimental purposes.

    I am very interested in this thread, naturally, so if I can provide any
    other information I'll be right on it.

    ejt


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