Bug#399015: mdadm: Unable to create new raid array

[Jerry Quinn]

Package: mdadm
Version: 2.5.6-5
Severity: important

I'm trying to create a raid array, and mdadm is unable to find /dev/md0.  I
originally installed my system on a single drive.  I have now added a second
drive that I intend to mirror the first drive with.  The first step of course
requires me to construct a raid array on the second drive, but mdadm isn't
able to.

I run:

mdadm --create /dev/md0 -l 1 -n 2 missing /dev/hdd1

to create a raid 1 array with 2 disks, 1 missing.  The result I get is:

mdadm: error opening /dev/md0: No such file or directory


Perhaps this is a bug in udev instead?  I have udev version 0.100-2.3
installed, the latest at this time.  0.100-2.2 didn't work any better hence
upgrading to the version in unstable.

-- Package-specific info:
--- mount output
/dev/hda1 on / type ext3 (rw,errors=remount-ro)
proc on /proc type proc (rw,noexec,nosuid,nodev)
/sys on /sys type sysfs (rw,noexec,nosuid,nodev)
udev on /dev type tmpfs (rw,mode=0755)
devshm on /dev/shm type tmpfs (rw)
devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=620)
usbfs on /proc/bus/usb type usbfs (rw,noexec,nosuid,nodev)

--- mdadm.conf
DEVICE partitions
MAILADDR jlquinn

--- /proc/mdstat:
Personalities : [linear] [multipath] [raid0] [raid1] [raid5] [raid4] [raid6] [raid10] 
unused devices: <none>

--- /proc/partitions:
major minor  #blocks  name

   3     0  244198584 hda
   3     1  241770186 hda1
   3     2    2425815 hda2
  22    64  244198584 hdd
  22    65  241770217 hdd1
  22    66    2425815 hdd2

--- initrd.img-2.6.17-1-k7:
21624 blocks
etc/mdadm
etc/mdadm/mdadm.conf
lib/modules/2.6.17-1-k7/kernel/drivers/md/md-mod.ko
lib/modules/2.6.17-1-k7/kernel/drivers/md/linear.ko
lib/modules/2.6.17-1-k7/kernel/drivers/md/multipath.ko
lib/modules/2.6.17-1-k7/kernel/drivers/md/raid0.ko
lib/modules/2.6.17-1-k7/kernel/drivers/md/raid1.ko
lib/modules/2.6.17-1-k7/kernel/drivers/md/xor.ko
lib/modules/2.6.17-1-k7/kernel/drivers/md/raid5.ko
lib/modules/2.6.17-1-k7/kernel/drivers/md/raid6.ko
lib/modules/2.6.17-1-k7/kernel/drivers/md/raid10.ko
sbin/mdadm
scripts/local-top/mdadm

--- /proc/modules:
dm_snapshot 15968 0 - Live 0xf2c49000
dm_mirror 19216 0 - Live 0xf2c32000
dm_mod 50520 2 dm_snapshot,dm_mirror, Live 0xf2c3b000
raid10 21120 0 - Live 0xf08e1000
raid6 102928 0 - Live 0xf090f000
raid5 30272 0 - Live 0xf08eb000
xor 14472 2 raid6,raid5, Live 0xf08c8000
raid1 20992 0 - Live 0xf08c1000
raid0 8000 0 - Live 0xf0802000
multipath 8448 0 - Live 0xf084b000
linear 5760 0 - Live 0xf0820000
md_mod 69524 7 raid10,raid6,raid5,raid1,raid0,multipath,linear, Live 0xf08cf000

--- volume detail:

--- /proc/cmdline
root=/dev/hda1 ro 

--- grub:
kernel		/boot/vmlinuz-2.6.17-1-k7 root=/dev/hda1 ro 
kernel		/boot/vmlinuz-2.6.17-1-k7 root=/dev/hda1 ro single
kernel		/boot/vmlinuz-2.6.16-2-k7 root=/dev/hda1 ro 
kernel		/boot/vmlinuz-2.6.16-2-k7 root=/dev/hda1 ro single
kernel		/boot/vmlinuz-2.6.16-1-k7 root=/dev/hda1 ro 
kernel		/boot/vmlinuz-2.6.16-1-k7 root=/dev/hda1 ro single
kernel		/boot/vmlinuz-2.6.15-1-k7 root=/dev/hda1 ro 
kernel		/boot/vmlinuz-2.6.15-1-k7 root=/dev/hda1 ro single
kernel		/boot/vmlinuz-2.6.14-2-k7 root=/dev/hda1 ro 
kernel		/boot/vmlinuz-2.6.14-2-k7 root=/dev/hda1 ro single
kernel		/boot/vmlinuz-2.6.14-1-k7 root=/dev/hda1 ro 
kernel		/boot/vmlinuz-2.6.14-1-k7 root=/dev/hda1 ro single
kernel		/boot/vmlinuz-2.6.12-1-k7 root=/dev/hda1 ro 
kernel		/boot/vmlinuz-2.6.12-1-k7 root=/dev/hda1 ro single
kernel		/boot/vmlinuz-2.6.11-1-k7 root=/dev/hda1 ro 
kernel		/boot/vmlinuz-2.6.11-1-k7 root=/dev/hda1 ro single


-- System Information:
Debian Release: 4.0
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'unstable'), (500, 'stable')
Architecture: i386 (i686)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.17-1-k7
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)

Versions of packages mdadm depends on:
ii  debconf [debconf-2.0]        1.5.8       Debian configuration management sy
ii  libc6                        2.3.6.ds1-7 GNU C Library: Shared libraries
ii  lsb-base                     3.1-15      Linux Standard Base 3.1 init scrip
ii  makedev                      2.3.1-83    creates device files in /dev

Versions of packages mdadm recommends:
ii  exim [mail-transport-agent]   3.36-18.1  An obsolete MTA (Mail Transport Ag
ii  module-init-tools             3.2.2-3    tools for managing Linux kernel mo

-- debconf information:
* mdadm/autostart: false
* mdadm/initrdstart: all
  mdadm/initrdstart_notinconf: false
  mdadm/initrdstart_msg_errexist:
  mdadm/initrdstart_msg_intro:
  mdadm/initrdstart_msg_errblock:
* mdadm/warning:
* mdadm/start_daemon: false
  mdadm/mail_to: jlquinn
  mdadm/initrdstart_msg_errmd:
  mdadm/initrdstart_msg_errconf:
* mdadm/autocheck: true