YES. THANK YOU. :)
It worked.
Correct, it is Fedora 9.
I just stopped MD0_d0 - I have no idea where that device came from.
Then performed my assemble command.
[root@zeus ~]# mdadm --assemble /dev/md0 /dev/sdb1 /dev/sdc1 /dev/sdd1 /dev/sde1
mdadm: /dev/md0 has been started with 4 drives.
[root@zeus ~]# cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4]
md0 : active raid5 sdb1[0] sde1[3] sdd1[2] sdc1[1]
1465150464 blocks level 5, 512k chunk, algorithm 2 [4/4] [UUUU]
unused devices: <none>
Mounted just peachy.
Now, if I could rollback, I'd see what broke it. But in this case,
from what you're saying, perhaps the kernel changed? I've pasted below
my update log so we can see all components changed. Also as an aside -
this from /var/log/messages - this segfault occured once I noticed
the missing array, freaked, and rebooted, forcing an earlier kernel
instead of the most recently updated.
Nov 25 19:34:09 zeus kernel: scsi 9:0:0:0: Direct-Access ATA
WDC WD5000YS-01M 09.0 PQ: 0 ANSI: 5
Nov 25 19:34:09 zeus kernel: sd 9:0:0:0: [sde] 976773168 512-byte
hardware sectors (500108 MB)
Nov 25 19:34:09 zeus kernel: sd 9:0:0:0: [sde] Write Protect is off
Nov 25 19:34:09 zeus kernel: sd 9:0:0:0: [sde] Write cache: enabled,
read cache: enabled, doesn't support DPO or FUA
Nov 25 19:34:09 zeus kernel: sd 9:0:0:0: [sde] 976773168 512-byte
hardware sectors (500108 MB)
Nov 25 19:34:09 zeus kernel: sd 9:0:0:0: [sde] Write Protect is off
Nov 25 19:34:09 zeus kernel: sd 9:0:0:0: [sde] Write cache: enabled,
read cache: enabled, doesn't support DPO or FUA
Nov 25 19:34:09 zeus kernel: sde: sde1
Nov 25 19:34:09 zeus kernel: sd 9:0:0:0: [sde] Attached SCSI disk
Nov 25 19:34:09 zeus kernel: sd 9:0:0:0: Attached scsi generic sg5 type 0
Nov 25 19:34:09 zeus kernel: mdadm[1445]: segfault at 102 ip 004b271b
sp bf82c360 error 4 in libc-2.8.so[43d000+163000]
Nov 25 19:34:09 zeus kernel: md: bind<sdd1>
Thanks,
Greg
Packages Installed:
kernel-devel-2.6.27.5-41.fc9.i686
kernel-firmware-2.6.27.5-41.fc9.noarch
kernel-2.6.27.5-41.fc9.i686
Packages Updated:
gnome-python2-gtkhtml2-2.19.1-21.fc9.i386
ql2400-firmware-4.04.05-1.fc9.noarch
rpmfusion-nonfree-release-9-12.noarch
setroubleshoot-plugins-2.0.11-1.fc9.noarch
libnetfilter_conntrack-0.0.97-1.fc9.i386
libxml2-python-2.7.2-2.fc9.i386
bluez-utils-alsa-3.36-1.fc9.i386
mplayer-1.0-0.98.20080903svn.fc9.i386
faac-1.25-7.fc9.i386
selinux-policy-targeted-3.3.1-107.fc9.noarch
bouncycastle-1.41-2.fc9.i386
libxml2-2.7.2-2.fc9.i386
texlive-texmf-fonts-2007-24.fc9.noarch
texlive-latex-2007-32.fc9.i386
python-genshi-0.5.1-2.fc9.i386
kernel-headers-2.6.27.5-41.fc9.i386
libpurple-2.5.2-1.fc9.i386
2:tar-1.19-5.fc9.i386
yelp-2.22.1-6.fc9.i386
mdadm-2.6.7.1-1.fc9.i386
texlive-dvips-2007-32.fc9.i386
xorg-x11-server-common-1.5.2-3.fc9.i386
xorg-x11-server-Xorg-1.5.2-3.fc9.i386
rpmfusion-free-release-9-12.noarch
gnutls-2.0.4-4.fc9.i386
xulrunner-1.9.0.4-1.fc9.i386
texlive-utils-2007-32.fc9.i386
sudo-1.6.9p13-7.fc9.i386
gnome-python2-libegg-2.19.1-21.fc9.i386
elfutils-libelf-0.137-3.fc9.i386
gdb-6.8-23.fc9.i386
kpathsea-2007-32.fc9.i386
gstreamer-plugins-base-0.10.19-4.fc9.i386
libraw1394-1.3.0-8.fc9.i386
totem-mozplugin-2.23.2-8.fc9.i386
paps-0.6.8-8.fc9.i386
totem-xine-2.23.2-8.fc9.i386
imlib2-1.4.2-1.fc9.i386
paps-libs-0.6.8-8.fc9.i386
firefox-3.0.4-1.fc9.i386
texlive-texmf-dvips-2007-24.fc9.noarch
1:wpa_supplicant-0.6.4-2.fc9.i386
texlive-texmf-latex-2007-24.fc9.noarch
texlive-texmf-2007-24.fc9.noarch
selinux-policy-devel-3.3.1-107.fc9.noarch
bluez-utils-3.36-1.fc9.i386
totem-2.23.2-8.fc9.i386
smplayer-0.6.4-1.fc9.i386
1:quota-3.15-8.fc9.i386
totem-nautilus-2.23.2-8.fc9.i386
bluez-utils-cups-3.36-1.fc9.i386
smolt-1.1.1.1-8.fc9.noarch
xorg-x11-drv-i810-2.3.2-3.fc9.i386
unrar-3.7.8-3.fc9.i386
ql23xx-firmware-3.03.27-1.fc9.noarch
libtirpc-0.1.7-21.fc9.i386
1:faad2-libs-2.6.1-6.fc9.i386
texlive-2007-32.fc9.i386
podsleuth-0.6.3-1.fc9.i386
gnome-python2-extras-2.19.1-21.fc9.i386
taglib-sharp-2.0.3.0-7.fc9.1.i386
vnc-libs-4.1.2-32.fc9.i386
selinux-policy-3.3.1-107.fc9.noarch
pidgin-2.5.2-1.fc9.i386
bluez-libs-3.36-1.fc9.i386
smolt-firstboot-1.1.1.1-8.fc9.noarch
totem-gstreamer-2.23.2-8.fc9.i386
vnc-server-4.1.2-32.fc9.i386
On Wed, Nov 26, 2008 at 5:18 PM, NeilBrown <neilb@xxxxxxx> wrote:
> On Thu, November 27, 2008 3:40 am, Greg Cormier wrote:
>> I have a RAID5 array of 4 disks. Was working well. I did a "yum
>> update" and noticed it updated mdadm to mdadm 2.6.7.1, amongst other
>> things (new kernel 2.2.27 instead of .26) , and now my array won't
>> mount.
>>
>> mdadm --assemble /dev/md0 /dev/sdb1 /dev/sdc1 /dev/sdd1 /dev/sde1
>> mdadm: cannot open device /dev/sdb1: Device or resource busy
>> mdadm: /dev/sdb1 has no superblock - assembly aborted
>>
>> [root@zeus ~]# cat /proc/mdstat
>> Personalities :
>> md_d0 : inactive sdb1[0](S) sdd1[2](S)
>> 976766976 blocks
>>
>> unused devices: <none>
>>
>>
>> Yet, if I examine, it looks okay?
>
> Strange.
> It looks like something else tried to assemble the array and only found
> sdb1 and sdd1 so it couldn't assemble it completely. But now those
> devices appear "in use" so you cannot assemble the array.
> One option would be
> mdadm -S /dev/md_d0
> and try again.
> Another which I would like you to try is
> mdadm --incremental /dev/sdc1
> mdadm --incremental /dev/sde1
>
> That should add those devices to the array and start it.
>
> You didn't say what distro you were using, though as you mention "yum"
> I assume a redhat based distro. I think they might be using "--incremental"
> to start arrays these days. Maybe something when wrong somewhere.
>
> Doug Ledford might be interested in more details.
>
> NeilBrown
>
>
>
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