[WBEL-users] Errors mounting raid device

[Tim Moore]

Tim Moore wrote:
>> 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/md3'.
> 
> # 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
>