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    Subjectbooting md0 (RedHat lilo patch)

    I would like some help concerning a broken md0 booting configuration,
    where I have no clue what can be wrong...
    What have happened is that I have put two out of the three disks of the
    RAID1 array on an UDMA66 add-on card, which the standard linux kernel does
    not recognizes w/o Andre's patches. Once I had to boot the stock kernel
    and modify /etc/rc.d/rc.sysinit (add hdparm -d0 /dev/hd[aeg]). During this
    the kernel had seen, that I have a mirror set with only one drive of the
    four in the system. Unfortunatelly, then I issued a lilo command, and
    since that lilo is not agreeing with my raid1 md0. At first it just did
    not know what to do with the device (md0). This might be ok because two
    disks to write to were missing.
    But when I booted an ide patched kernel, and ran lilo again, and here
    comes the strangest thing: it did its work, but not for all the three
    drives, az previously, but only for the middle one (e out of hd[aeg]).
    Since then I am running the box with a and e swapped, so it boots, and the
    arrays still autorun fine, but cannot get lilo write its stuff on the e
    and g drives.

    What might be the resolution for this problem?

    /proc/mdstat seems ok to me...
    [root@iq /root]# cat /proc/mdstat
    Personalities : [raid0] [raid1] [raid5]
    read_ahead 1024 sectors
    md0 : active raid1 hdg1[1] hde1[2] hda1[0] 204992 blocks [3/3] [UUU]
    md1 : active raid5 hdg3[0] hde3[2] hda3[1] 2097408 blocks level 5, 64k
    chunk, algorithm 0 [3/3] [UUU]
    md2 : active raid5 hdg5[0] hde5[2] hda5[1] 153984 blocks level 5, 64k
    chunk, algorithm 2 [3/3] [UUU]
    md3 : active raid5 hdg6[0] hde6[2] hda6[1] 511872 blocks level 5, 64k
    chunk, algorithm 2 [3/3] [UUU]
    md4 : active raid0 hdg7[0] hde7[2] hda7[1] 675456 blocks 32k chunks
    md5 : active raid0 hdg8[0] hde8[2] hda8[1] 40803456 blocks 32k chunks
    unused devices: <none>

    -- SaPE

    Peter Sasi <>

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