LinuxQuestions.org
Review your favorite Linux distribution.
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Software
User Name
Password
Linux - Software This forum is for Software issues.
Having a problem installing a new program? Want to know which application is best for the job? Post your question in this forum.

Notices



Reply
 
Search this Thread
Old 03-10-2010, 07:12 PM   #1
Hummdis
LQ Newbie
 
Registered: Mar 2006
Location: Phoenix, AZ
Distribution: Fedora, openSuSE, Ubuntu...lots!
Posts: 4

Rep: Reputation: 0
RAID Created with 'mdadm' on /dev/md0, but uses /dev/md3


I have done lots of searching and I haven't been able to find anyone else with the same problem.

Whenever I create a RAID with 'mdadm', regardless of level (I've done linear, 0, and 5) the command I use is:

Code:
mdadm --create --run --verbose /dev/md0 --raid-devices=11 --spare-devices=1 --chunk=256 --level=5 /dev/sd[abcdefghijkl]1
The RAID is build RAID 5 as it should be. However, when I check /proc/partitions it shows under "md3".

Code:
major minor  #blocks  name
  3     0    80043264 hda
  3     1    80043263 hda1
  8     0   488386584 sda
  8     1   488384032 sda1
  8     16  488386584 sdb
  8     17  488384032 sdb1
  8     18  488386584 sdc
  8     26  488384032 sdc1
  8     19  488386584 sdd
  8     35  488384032 sdd1
  8     20  488386584 sde
  8     64  488384032 sde1
  8     21  488386584 sdf
  8     74  488384032 sdf1
  8     22  488386584 sdg
  8     89  488384032 sdg1
  8     23  488386584 sdh
  8     97  488384032 sdh1
  8     24  488386584 sdi
  8     110 488384032 sdi1
  8     25  488386584 sdj
  8     137 488384032 sdj1
  8     26  488386584 sdk
  8     142 488384032 sdk1
  8     27  488386584 sdl
  8     167 488384032 sdl1
  9     3  5860608384 md3
Needless to say, this is quite strange because even the /proc/mdstat shows:

Code:
Personalities : [raid5]
md3 : active raid5 sdl1[11] sdk1[10] sdj1[9] sdi1[8] sdh1[7] sdg1[6] sdf1[5] sde1[4] sdd1[3] sdc1[2] sdb1[1] sda1[0]
      5860608384 blocks 256k rounding

unused devices: <none>
Then, when I run 'mdadm --detail /dev/md0' I get:

Code:
/dev/md0:
Version : 00.90.03
Creation Time : Thu Oct 30 06:24:46 2008
Raid Level : raid5
Array Size : 7324032000 (6984.74 GiB 7499.81 GB)
Device Size : 732403200 (698.47 GiB 749.98 GB)
Raid Devices : 11
Total Devices : 10
Preferred Minor : 3
Persistence : Superblock is persistent

Update Time : Tue Feb 9 10:03:45 2010
State : clean, no-errors
Active Devices : 11
Working Devices : 10
Failed Devices : 0
Spare Devices : 1

Layout : left-symmetric
Chunk Size : 256K

Number Major Minor RaidDevice State
0 8 1 0 active sync /dev/sda1
1 8 17 1 active sync /dev/sdb1
2 8 33 2 active sync /dev/sdc1
3 8 49 3 active sync /dev/sdd1
4 8 65 4 active sync /dev/sde1
5 8 81 5 active sync /dev/sdf1
6 8 97 6 active sync /dev/sdg1
7 8 113 7 active sync /dev/sdh1
8 8 129 8 active sync /dev/sdi1
9 8 148 9 active sync /dev/sdj1
10 8 161 10 active sync /dev/sdk1
UUID : 11a9e009:e79cb14d:87d7e939:1c1cc840
Events : 0.2344210
The command "mdadm --examine --scan" shows:

Code:
ARRAY /dev/md3 level=raid5 num-devices=10 num-spares=1 UUID=5289da22:ad04459f:d7beb9e9:1b25e6c4   devices=/dev/sda1,/dev/sdb1,/dev/sdc1,/dev/sdd1,/dev/sde1,/dev/sdf1,/dev/sdg1,/dev/sdh1,/dev/sdi1,/dev/sdj1,/dev/sdk1,/dev/sdl1
I'm at a total loss as to how this is happening, but it's messing up my RAID monitoring since it's trying to monitor /dev/md0 and I keep getting "DeviceDissapeared" messages. Changing the mdadm.conf file from /dev/md3 to /dev/md0 doesn't fix the problem.

Anybody have any thoughts?
 
Old 03-12-2010, 09:06 AM   #2
Hummdis
LQ Newbie
 
Registered: Mar 2006
Location: Phoenix, AZ
Distribution: Fedora, openSuSE, Ubuntu...lots!
Posts: 4

Original Poster
Rep: Reputation: 0
Nobody has any ideas?
 
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Cannot create /dev/md1 using mdadm after /dev/md0 is created dwong05 Linux - Newbie 1 05-04-2009 03:37 AM
How To Clone Single Drive To Raid 1+0 (copy /dev/sde to /dev/md0)? alfista Linux - Server 5 03-18-2008 11:57 PM
How To Clone Single Drive To Raid 1+0 (copy /dev/sde to /dev/md0)? alfista Linux - Server 2 03-17-2008 11:26 PM
How To Clone Single Drive To Raid 1+0 (copy /dev/sde to /dev/md0)? alfista Linux - Server 2 03-13-2008 05:17 AM


All times are GMT -5. The time now is 06:38 AM.

Main Menu
Advertisement
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
identi.ca: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration