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From: Agustinus Tedja <agustinus.tedja@infodesign-osd.de>
To: linux-raid@vger.kernel.org
Subject: RAID-0 Autodetection fails
Date: Wed, 24 Jul 2002 14:28:54 +0200	[thread overview]
Message-ID: <3D3E9D86.E75D15C7@infodesign-osd.de> (raw)

Hello everybody,
I am installing Linux SuSE 8.0 with kernel version 2.4.18-4GB. This
kernel should have already contain the Software-RAID module as
advertised by SuSE.
I have 3 equal drives. For simplicity I installed complete Linux only in
a drive hdb(the boot and the root is in this normal drive) and now I am
trying to make a RAID level 0 with the rest 2 drives called hdc and hdd. 
I have made these two drives into a RAID-drive called /dev/md0 with
YaST2 help and it was successfully mounted and used.
But each time I rebooted the system, this /dev/md0 could not be
recognized at startup and all data in /dev/md0 was lost as well. I
needed to mount it again afterwards, that made it a silly idea.
What is wrong ? Any hints and helps are gladly welcomed.

Regards,
Agustinus Tedja
InfoDesign-OSD

Here is the message on boot, it generates failure
...
<6>md: md driver 0.90.0 MAX_MD_DEVS=256, MD_SB_DISKS=27
<6>md: Autodetecting RAID arrays.
<6> |events: 0000009a]
<6> |events: 0000009a]
<6>md: autorun ...
<6>md: considering hdd1 ...
<6>md:  adding hdd1 ...
<6>md:  adding hdc1 ...
<6>md: created md0
<6>md: bind<hdc1,1>
<6>md: bind<hdd1,2>
<6>md: running: <hdd1><hdc1>
<6>md: hdd1's event counter: 0000009a
<6>md: hdc1's event counter: 0000009a
<3>request_module[md-personality-2]: Root fs not mounted
<3>md: personality 2 is not loaded!
<4>md: do_md_run() returned -22
<6>md: md0 stopped.
<6>md: unbind<hdd1,1>
<6>md: export_rdev(hdd1)
<6>md: unbind<hdc1,0>
<6>md: export_rdev(hdc1)
<6>md: ... autorun DONE.

...and after some lines below there are other message lines as if it is
working

<3>md: invalid raid superblock magic on hdc
<4>md: hdc has invalid sb, not importing!
<4>md: could not import hdc!
<4>md: autostart hdc failed!
<6>md: Autodetecting RAID arrays.
<6> |events: 0000009a]
<6> |events: 0000009a]
<6>md: autorun ...
<6>md: considering hdd1 ...
<6>md:  adding hdd1 ...
<6>md:  adding hdc1 ...
<6>md: created md0
<6>md: bind<hdc1,1>
<6>md: bind<hdd1,2>
<6>md: running: <hdd1><hdc1>
<6>md: hdc1's event counter: 0000009a
<6>md: hdd1's event counter: 0000009a
<6>md: raid0 personality readahead registered as nr 2
<6>md0: max total readahead window set to 496k
<6>md0: 2 data-disks, max readahead per data-disk: 248k
<4>raid0: looking at hdc1
<4>raid0:   comparing hdc1 (80418112) with hdc1(80418112)
<4>raid0:   END
<4>raid0:   ==> UNIQUE
<4>raid0: 1 zones
<4>raid0: looking at hdd1
<4>raid0:   comparing hdd1 (80418112) with hdc1(80418112)
<4>raid0:   EQUAL
<4>raid0: FINAL 1 zones
<4>raid0: zone 0
<4>raid0: checking hdc1 ... contained as device 0
<4>  (80418112) is smallest!
<4>raid0: checking hdd1 ... contained as device 1
<4>raid0: zone->nb_dev: 2, size: 160836224
<4>raid0: current zone offset: 80418112
<4>raid0: done.
<4>raid0:  md_size is 160836224 blocks
<4>raid0:  conf->smallest->size is 160836224 blocks.
<4>raid0:  nb_zone is 1.
<4>raid0:  Allocationg 8 bytes for hash.
<6>md: updating md0 RAID superblock on device
<6>md: hdc1 [events: 0000009b]<6>(write) hdc1's sb offset: 80418112
<6>md: hdd1 [events: 0000009b]<6>(write) hdd1's sb offset: 80418112
<6>md: ... autorun DONE.




FYI here I give the content of some important files:
/etc/fstab:
        /dev/hdb3       /               reiserfs        defaults 1 2
        /dev/hdb2       /boot           reiserfs        defaults 1 2
        /dev/md0        /dataraid       auto            noauto, user 0 0
        devpts          /dev/pts        devpts          defaults 0 0
        /dev/cdrecorder /media/cdrecorder auto         
ro,noauto,user,exec 0 0
        /dev/cdrom      /media/cdrom    auto            noauto,user,exec
0 0
        /dev/fd0        /media/floppy   auto            noauto,user,sync
0 0
        usbdevs         /proc/bus/usb   usbdevs         noauto 0 0
        proc            /proc           proc            defaults 0 0
        /dev/hdb1       swap            swap            pri=42 0 0      

/etc/raidtab:
        raiddev /dev/md0
        raid-level 0
        nr-raid-disks 2
        persistent-superblock 1
        chunk-size 32
        device /dev/hdc
        raid-disk 0
        device /dev/hdd
        raid-disk 1

/etc/mtab: (not mdtab, inside there is no md0 entry)
        /dev/hdb3       /       reiserfs        rw 0 0
        proc            /proc   proc            rw 0 0
        devpts          /dev/pts devpts         rw 0 0
        /dev/hdb2       /boot   reiserfs        rw 0 0
        shmfs           /dev/shm  shm           rw 0 0
        usbdevfs        /proc/bus/usb  usbdevs  rw 0 0

             reply	other threads:[~2002-07-24 12:28 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-07-24 12:28 Agustinus Tedja [this message]
  -- strict thread matches above, loose matches on Subject: below --
2002-07-24 12:22 RAID-0 Autodetection fails Agustinus Tedja
2002-07-29 10:05 ` Neil Brown

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