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Ext3 and external journals...



Hi,
 I am trying out ext3 with an external journal (on a battery backed
 RAM card).  I use data=journal, and sync nfs writes go nice and fast :-)

 But.. I had to power cycle it (buggy VM.. grumble :-) and now I cannot
 get my filesystem back.  It is only a test filesystem so I don't need
 the data.  But I want this to work before I put real data on it.

 If I "fsck /dev/md1", it says

    Parallelizing fsck version 1.22 (22-Jun-2001)
    e2fsck 1.22, 22-Jun-2001 for EXT2 FS 0.5b, 95/08/09
    Superblock has external ext3 journal device (unsupported).
    Abort<y>?

 So I say yes.
 I try to mount it :

    mount /dev/md1 /export/eno/1 -t ext3

 and the kernel log says:

    EXT3-fs: External journal has more than one user (unsupported) - 2

 which is a lie.  There is only one user.

 I am using 2.4.13 with  EXT3 FS 2.4-0.9.13, 21 Oct 2001, and
 e2fsprocs 1.22.

 I appreciate that there is a 0.9.14 out but the changelog doesn't
 mention anything about external journals.

 I created the filesystem and journal as per the instructions on
 andrewm's ext3 web page.

 Any patches or suggestions most welcome.

NeilBrown





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