🚀 go-pugleaf

Hi,

How can I prevent the RAID1 for root from doing a resync with each boot?
Shouldn't the RAID be clean after a regular shutdown?
I also did a 'fsck' on /dev/md0 from the rescue system. But next time
after the system was shutdown, when /dev/md0 was the root device (rw),
it would resync again with the next boot.

/dev/md1 is perfectly fine and resyncs not too often.

Some advice, please.


The setup:
I have setup my system to boot with GRUB from a harddisk device and have
the root filesystem on a RAID1 device. /home is on another RAID1 device.
The two harddisks are on seperate controllers.
Everything works fine exept the fact that '/dev/md0' is resyncing
everytime after boot. Is this normal or can you show a way to avoid that.

Info about the configuraton:

SuSE8.2, kernel 2.4.20-4GB (compiled with reiserfs.o and raid1.0
builtin), raidtools V1.00.3-24


/etc/fstab:
  /dev/md0             /                    reiserfs
  /dev/hda3            /boot                ext2
  /dev/md1             /home                reiserfs

/etc/raidtab:
  # md device [dev 9, 0] /dev/md0 queried online
  raiddev /dev/md0
         raid-level              1
         nr-raid-disks           2
         nr-spare-disks          0
         persistent-superblock   1
         chunk-size              4

         device          /dev/hde2
         raid-disk               0
         device          /dev/hda2
         raid-disk               1

         ....

I built the RAID1 according the instructions in
'Software-RAID-HOWTO.html' in degraided mode and 'raidhotadd'(ed)
/dev/md0 /dev/hda2, which was configured as faulty device, when setting
everything up.


/var/log/boot.msg:
<6>md: considering hde2 ...
<6>md:  adding hde2 ...
<6>md:  adding hda2 ...
<6>md: created md0
<6>md: bind<hda2,1>
<6>md: bind<hde2,2>
<6>md: running: <hde2><hda2>
<6>md: hde2's event counter: 00000025
<6>md: hda2's event counter: 00000025
<3>md: md0: raid array is not clean -- starting background reconstruction
<6>md: RAID level 1 does not need chunksize! Continuing anyway.
<6>md0: max total readahead window set to 508k
<6>md0: 1 data-disks, max readahead per data-disk: 508k
<6>raid1: device hde2 operational as mirror 0
<6>raid1: device hda2 operational as mirror 1
<4>raid1: raid set md0 not clean; reconstructing mirrors
<6>raid1: raid set md0 active with 2 out of 2 mirrors
<6>md: updating md0 RAID superblock on device
<6>md: hde2 [events: 00000026]<6>(write) hde2's sb offset: 45865408
<6>md: syncing RAID array md0
<6>md: minimum _guaranteed_ reconstruction speed: 100 KB/sec/disc.
<6>md: using maximum available idle IO bandwith (but not more than
100000 KB/sec
) for reconstruction.
<6>md: using 508k window, over a total of 45865408 blocks.
<6>md: hda2 [events: 00000026]<6>(write) hda2's sb offset: 45865472
<6> [events: 00000000]
<3>md: invalid raid superblock magic on md0
<4>md: md0 has invalid sb, not importing!
<4>md: no nested md device found
<6>md: ... autorun DONE.