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Re: Problems after creating a big file with dd

To: Austin Gonyou <austin@xxxxxxxxxxxxxxx>
Subject: Re: Problems after creating a big file with dd
From: Daniel Just <d.just@xxxxxx>
Date: Tue, 22 Jan 2002 15:56:29 +0100
Cc: linux-xfs@xxxxxxxxxxx
In-reply-to: <1011643073.19837.14.camel@UberGeek>
Mail-followup-to: Daniel Just <d.just@xxxxxx>, Austin Gonyou <austin@xxxxxxxxxxxxxxx>, linux-xfs@xxxxxxxxxxx
Organization: WTF?
References: <20020121191108.GA1448@maryland.danieljust.de> <1011643073.19837.14.camel@UberGeek>
Sender: owner-linux-xfs@xxxxxxxxxxx
Hello Austin,

thanks for your reply.

* Austin Gonyou <austin@xxxxxxxxxxxxxxx> [21-01-02 20:57]:

> It sounds like a possible HW issue. Could also be your partition setup
> too. You don't have overlapping partitions do you? Just curious.  

No.

> In regards to 2.4.17, I'm running it on my 1550 at my desk, but I have
> problems with that kernel corrupting files from time to time. I'm not

I haven't experienced anything like that before, I'm using xfs since
2.4.9 without any trouble.

I didn't post about my hardware-setup as suggested in the FAQ: Intel
LX Chipset, WDC WD300BB-00AUA1 ATA DISK drive

I repeated that test I did yesterday once again and that is what
xfs_check told me afterwards: (the first error-entries in
/var/log/messages occured when the file had approximately 1GB)
(shortened)

    bad agf magic # 0 in ag 0
    bad agf version # 0 in ag 0
    block 0/0 expected type unknown got sb
    bad agi magic # 0 in ag 0
    bad agi version # 0 in ag 0
    bad magic # 0x58465342 in btbno block 0/0
    bad magic # 0x58465342 in btcnt block 0/0
    bad magic # 0x58465342 in inobt block 0/0
    agi unlinked bucket 0 is 0 in ag 0 (inode=0)
    agi unlinked bucket 1 is 0 in ag 0 (inode=0)
    [...]
    agi unlinked bucket 62 is 0 in ag 0 (inode=0)
    agi unlinked bucket 63 is 0 in ag 0 (inode=0)
    block 0/6491 expected type unknown got missing
    block 0/6492 expected type unknown got missing
    [...]
    block 0/814 expected type unknown got missing
    block 0/815 expected type unknown got missing

Doing 'cat file-with-700MB >> otherfile' repeatedly let me produce a
file with 9GB without any problems on this partition.

[time passes]

Finally, I grabbed a kernel from cvs today, and all I can say is that
all works fine right now. I've just dd'ed a file with 3GB without any
problem.

Best Regards,

Daniel


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