From: Rainer Fuegenstein <rfu@kaneda.iguw.tuwien.ac.at>
To: Neil Brown <neilb@suse.de>
Cc: linux-raid@vger.kernel.org
Subject: Re: is this raid5 OK ?
Date: Fri, 30 Mar 2007 13:43:43 +0200 [thread overview]
Message-ID: <460CF7EF.1000203@kaneda.iguw.tuwien.ac.at> (raw)
In-Reply-To: <17932.22575.558925.535963@notabene.brown>
hi,
1) the kernel was:
[root@alfred ~]# uname -a
Linux alfred 2.6.19-1.2288.fc5xen0 #1 SMP Sat Feb 10 16:57:02 EST 2007
i686 athlon i386 GNU/Linux
now upgraded to:
[root@alfred ~]# uname -a
Linux alfred 2.6.20-1.2307.fc5xen0 #1 SMP Sun Mar 18 21:59:42 EDT 2007
i686 athlon i386 GNU/Linux
OS is fedora core 6
[root@alfred ~]# mdadm --version
mdadm - v2.3.1 - 6 February 2006
2) I got the impression that the old 350W power supply was to weak, I
replaced it by a 400W version.
3) re-created the raid:
[root@alfred ~]# mdadm --misc --zero-superblock /dev/hde1
[root@alfred ~]# mdadm --misc --zero-superblock /dev/hdf1
[root@alfred ~]# mdadm --misc --zero-superblock /dev/hdg1
[root@alfred ~]# mdadm --misc --zero-superblock /dev/hdh1
[root@alfred ~]# mdadm --create --verbose /dev/md0 --level=5
--raid-devices=4 --spare-devices=0 /dev/hde1 /dev/hdf1 /dev/hdg1 /dev/hdh1
mdadm: layout defaults to left-symmetric
mdadm: chunk size defaults to 64K
mdadm: size set to 390708736K
mdadm: array /dev/md0 started.
[root@alfred ~]# cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4]
md0 : active raid5 hdh1[4] hdg1[2] hdf1[1] hde1[0]
1172126208 blocks level 5, 64k chunk, algorithm 2 [4/3] [UUU_]
unused devices: <none>
same as before.
4) did as dan suggested:
[root@alfred ~]# mdadm -S /dev/md0
[root@alfred ~]# mdadm --misc --zero-superblock /dev/hde1
[root@alfred ~]# mdadm --misc --zero-superblock /dev/hdf1
[root@alfred ~]# mdadm --misc --zero-superblock /dev/hdg1
[root@alfred ~]# mdadm --misc --zero-superblock /dev/hdh1
[root@alfred ~]# mdadm --create /dev/md0 -n 4 -l 5 /dev/hd[efg]1 missing
mdadm: array /dev/md0 started.
[root@alfred ~]# cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4]
md0 : active raid5 hdg1[2] hdf1[1] hde1[0]
1172126208 blocks level 5, 64k chunk, algorithm 2 [4/3] [UUU_]
unused devices: <none>
[root@alfred ~]# mdadm --add /dev/md0 /dev/hdh1
mdadm: added /dev/hdh1
[root@alfred ~]# cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4]
md0 : active raid5 hdh1[4] hdg1[2] hdf1[1] hde1[0]
1172126208 blocks level 5, 64k chunk, algorithm 2 [4/3] [UUU_]
[>....................] recovery = 0.0% (47984/390708736)
finish=406.9min speed=15994K/sec
unused devices: <none>
seems like it's working now - tnx !
cu
next prev parent reply other threads:[~2007-03-30 11:43 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-29 17:38 is this raid5 OK ? Rainer Fuegenstein
2007-03-29 22:35 ` Justin Piszcz
2007-03-30 0:22 ` Neil Brown
2007-03-30 5:51 ` Dan Williams
2007-03-30 11:43 ` Rainer Fuegenstein [this message]
2007-03-30 16:28 ` Bill Davidsen
2007-03-30 18:23 ` Rainer Fuegenstein
2007-03-30 20:58 ` Justin Piszcz
2007-03-31 1:00 ` Bill Davidsen
2007-03-31 0:59 ` Bill Davidsen
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