[opensuse] Re: moving half a raid drive to a new pc

SO SORRY I meant Raid 1, not Raid 0. I was mirroring the drives.

On Thu, Jun 21, 2012 at 11:50 AM, George Olson <grglsn765@xxxxxxxxx> wrote:
I am upgrading my system at my office and at home, and right now I am
in a bit of a limbo state because I can't get my new pc to boot from
the hard disk. Maybe some help with grub can get me going, or with a
degraded raid.

Right now I am using a live kde cd (I am so pleased at how easy it is
to use one of these :) )

So here is the way things are. I was running raid 0 on my old desktop.
I have built a new desktop (with a better processor and more ram) and
I took one of the raid drives off my old desktop and installed it in
in my new desktop. I have also added a 2nd tb drive and partitioned it
to exactly match the sizes on my old one, with the ultimate goal of
having raid 0 on all partitions of both drives (before I was only
using raid 0 on half the drive because I was mirroring a 500gb with
half of a 1 tb drive). However, I have not yet installed anything on
the new drive.

Here you can see my partition tables:

linux:/home/linux # fdisk -l

Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0001fa6f

  Device Boot      Start         End      Blocks   Id  System
/dev/sda1            2048     4192255     2095104   82  Linux swap / Solaris
/dev/sda2   *     4192256    46139391    20973568   fd  Linux raid autodetect
/dev/sda3        46139392   976752639   465306624   fd  Linux raid autodetect
/dev/sda4       976752640  1953523711   488385536    f  W95 Ext'd (LBA)
/dev/sda5       976754688  1018697727    20971520   83  Linux
/dev/sda6      1018699776  1060642815    20971520   83  Linux
/dev/sda7      1060644864  1953503231   446429184   83  Linux

Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x00030fbd

  Device Boot      Start         End      Blocks   Id  System
/dev/sdb1            2048     4192255     2095104   82  Linux swap / Solaris
/dev/sdb2         4192256    46139391    20973568   83  Linux
/dev/sdb3        46139392   976752639   465306624   83  Linux
/dev/sdb4       976752640  1953523711   488385536    5  Extended
/dev/sdb5       976754688  1018697727    20971520   83  Linux
/dev/sdb6      1018699776  1060642815    20971520   83  Linux
/dev/sdb7      1060644864  1953503231   446429184   83  Linux

So, I have used grub in a konsole to do the following:
grub> find /boot/grub/stage1
 (hd0,1)
 (hd0,4)

grub> root (hd0,1)
 Filesystem type is ext2fs, partition type 0xfd

grub> setup (hd0)
 Checking if "/boot/grub/stage1" exists... yes
 Checking if "/boot/grub/stage2" exists... yes
 Checking if "/boot/grub/e2fs_stage1_5" exists... yes
 Running "embed /boot/grub/e2fs_stage1_5 (hd0)"...  17 sectors are embedded.
succeeded
 Running "install /boot/grub/stage1 (hd0) (hd0)1+17 p
(hd0,1)/boot/grub/stage2 /boot/grub/menu.lst"... succeeded
Done.

Now when I try and boot, I get the following error:

kernel (hd0)/vmlinuz-3.1.0-1.2-deskop
root-/dev/disk/by-id/ata-ST1000DM003-9YN162_S1D069EC-part6
resume-/dev/disk/by-id/ata-Hitachi_HDS721050CLA362_JP85
21HR2HU93V-part1 splash-silent quiet showopts vga=0x317

Error 17: Cannot mount selected partition
Press any key to continue...


I am finding that when I boot up in the live linux cd, like I am now,
I cannot mount the raid partitions to modify the menu.lst file or
anything like that because they are looked at as "Linux raid
autodetect" instead of ext4.

So my question is, is there a way for me to boot up into /dev/sda2 as
a degraded raid, so as to begin setting up my system on this new
hardware? I thought that perhaps if I just used the install disk of
opensuse 12.1 and did an "upgrade" on the old raid partition, it would
fix everything so that I could boot into that drive. However, nothing
really changed, except that some new packages were installed.

George
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