[WBEL-users] Errors mounting raid device
Simone
simone72@email.it
Tue, 6 Apr 2004 19:43:42 +0200
Thank you for posting it.
I've made many tests today, and I came to the same conclusion, but your mail
makes me feel much more comfortable with the idea I'm doing the right thing
;-)
Doing those steps, I finally have a filesystem on md3 I can check with
e2fsck having no reported problems, and the partition table on hdg and hde
looks healty.
I think it works, thank you very much, it's been a great help. Tomorrow I'll
be trying to figure out an easy (approaciable for me) way to backup datas,
and probably the day after it will be in production. Really scary, but it
has to be done (any suggestion for tape-backup docs to read again, very
welcome).
Thanks again, have a nice day
Simone
----- Original Message -----
From: "Tim Moore" <whitebox@nsr500.net>
To: "whitebox-users" <whitebox-users@beau.org>
Sent: Tuesday, April 06, 2004 6:03 PM
Subject: Re: [WBEL-users] Errors mounting raid device
> > If you have time, just some quick more questions. I started the array,
then
> > partitioned with fdisk (chosed primary, 1 partition 200Gb, type 83),
> > rebooted.
> > Checked fdisk printed the right partition, ok, I get /dev/md3p1 (means
it is
> > extended? I choosed a primary partition.....)
>
> Does not look correct. Unfortunately at the time I was working on a
> machine with both both hardware (3ware) and software raid, and gave a
> somewhat confusing reply. Apologies. Try the following and let me know
if
> it works.
>
> rgds,
> tim.
>
> SOFTWARE RAID
> -------------
> 1. Configure kernel 'Multi-device support (RAID and LVM)' section.
> 2. Partition the physical disks that will make up the raid set as type
> 'fd'. Here is the machine I was working on:
>
> # fdisk -l /dev/sda /dev/sdb
>
> Disk /dev/sda: 255 heads, 63 sectors, 2501 cylinders
> Units = cylinders of 16065 * 512 bytes
>
> Device Boot Start End Blocks Id System
> /dev/sda1 * 1 13 104391 83 Linux
> /dev/sda2 14 45 257040 82 Linux swap
> /dev/sda3 46 2500 19719787+ 5 Extended
> /dev/sda5 46 306 2096451 fd Linux raid autodetect
> /dev/sda6 307 457 1212876 fd Linux raid autodetect
> /dev/sda7 458 1248 6353676 fd Linux raid autodetect
> /dev/sda8 1249 2500 10056658+ fd Linux raid autodetect
>
> Disk /dev/sdb: 255 heads, 63 sectors, 2501 cylinders
> Units = cylinders of 16065 * 512 bytes
>
> Device Boot Start End Blocks Id System
> /dev/sdb1 * 1 13 104391 83 Linux
> /dev/sdb2 14 45 257040 82 Linux swap
> /dev/sdb3 46 2500 19719787+ 5 Extended
> /dev/sdb5 46 306 2096451 fd Linux raid autodetect
> /dev/sdb6 307 457 1212876 fd Linux raid autodetect
> /dev/sdb7 458 1248 6353676 fd Linux raid autodetect
> /dev/sdb8 1249 2500 10056658+ fd Linux raid autodetect
>
> These partitions will be combined in /etc/raidtab to make up the md
devices.
>
> # cat /proc/mdstat
> Personalities : [raid0] [raid1] [raid5]
> read_ahead 1024 sectors
> md0 : active raid0 sdb5[1] sda5[0]
> 4192768 blocks 32k chunks
>
> md1 : active raid0 sdb6[1] sda6[0]
> 2425600 blocks 32k chunks
>
> md2 : active raid0 sdb7[1] sda7[0]
> 12707200 blocks 64k chunks
>
> md3 : active raid0 sdb8[1] sda8[0]
> 20113152 blocks 64k chunks
>
> unused devices: <none>
>
> 3. Setup /etc/raidtab (use 'persistent-superblock 1'), run 'mkraid' and
> 'raidstart', check /proc/mdstat. It should look similar to the one above.
>
> 4. Make the filesystem on each /dev/md device. For the following
> filesystem, the command was 'mke2fs -j -m0 -b4096 -L spare /dev/md4'.
>
> # tune2fs -l /dev/md3
> tune2fs 1.27 (8-Mar-2002)
> Filesystem volume name: spare
> Last mounted on: <not available>
> Filesystem UUID: 1ed2818f-6dbe-491f-b120-ccf1f341e01f
> Filesystem magic number: 0xEF53
> Filesystem revision #: 1 (dynamic)
> Filesystem features: has_journal filetype needs_recovery sparse_super
> Filesystem state: clean
> Errors behavior: Continue
> Filesystem OS type: Linux
> Inode count: 2518208
> Block count: 5028288
> Reserved block count: 0
> Free blocks: 1336660
> Free inodes: 2363764
> First block: 0
> Block size: 4096
> Fragment size: 4096
> Blocks per group: 32768
> Fragments per group: 32768
> Inodes per group: 16352
> blocks per group: 511
> Last mount time: Tue Apr 6 07:27:07 2004
> Last write time: Tue Apr 6 07:27:07 2004
> Mount count: 63
> Maximum mount count: -1
> Last checked: Fri Mar 5 10:52:00 2004
> Check interval: 3888000 (1 month, 2 weeks, 1 day)
> Next check after: Mon Apr 19 11:52:00 2004
> Reserved blocks uid: 0 (user root)
> Reserved blocks gid: 0 (group root)
> First inode: 11
> Inode size: 128
> Journal UUID: <none>
> Journal inode: 8
> Journal device: 0x0000
> First orphan inode: 0
>
> 5. Mount the /dev/md devices. Here's the /etc/fstab entry for the above
> filesystem:
>
> LABEL=spare /spare ext3 defaults,noatime,data=writeback 1 5
> _______________________________________________
> Whitebox-users mailing list
> Whitebox-users@beau.org
> http://beau.org/mailman/listinfo/whitebox-users
---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.648 / Virus Database: 415 - Release Date: 01/04/2004