Hello Sir,
I want to Setup RAID 0 on my standalone
system. I have windows and linux both on my system. I
went through many documents and and also through the
book 'Managing RAID on Linux ' by Derek Vadala. I
tried to setup RAID with the following steps. I
downloaded mdadm from your site. I have listed down
the steps i did with their outputs. Please if you
could go through it and let me know where the problem
lies, it would be of great help.
1. I was able to include the RAID modules with the
modprobe command. The mdstat file was as below.
bash2-2.05b# cat /proc/mdstat
Personalities : [raid0] [raid1]
read_ahead not set
unused devices: <none>
---------------------------------------------------
2. I partitioned the disk using fdisk and the
pratition table looked like below
Disk /dev/hda: 40.0 GB, 40020664320 bytes
255 heads, 63 sectors/track, 4865 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id
System
/dev/hda1 * 1 1275 10241406 c
Win95 FAT32 (LBA)
/dev/hda2 1276 2550 10241437+ f
Win95 Ext'd (LBA)
/dev/hda3 2551 2626 610470 82
Linux swap
/dev/hda4 2627 4865 17984767+ fd
Linux raid autodetect
/dev/hda5 1276 2550 10241406 fd
Linux raid autodetect
------------------------------------------------
3. Then I worrked with the following command.
I got the following error.
bash2-2.05b# mdadm --create /dev/md0 --level=0
--chunk=128 --raid-disks=2 /dev/hda5 /dev/hda4
mdadm: /dev/hda5 appears to contain an ext2fs file
system size=10241404K mtime=Sat Oct 9 17:06:24 2004
Continue creating array? y
mdadm: ADD_NEW_DISK for /dev/hda5 failed: Invalid
argument
--------------------------------------------------
4. When i again tried with that command, it showed
the following error.
bash2-2.05b# mdadm --create /dev/md0 --level=0
--chunk=128 --raid-disks=2 /dev/hda5 /dev/hda4
mdadm: /dev/hda5 appears to contain an ext2fs file
system size=10241404K mtime=Sat Oct 9 17:06:24 2004
Continue creating array? y
mdadm: SET_ARRAY_INFO failed for /dev/md0: File
exists
---------------------------------------------------
5. the mdstat file was same
bash2-2.05b# cat /proc/mdstat
Personalities : [raid0] [raid1]
read_ahead not set
md0 : inactive
unused devices: <none>
Please if you could solve my problem, it
would be of very great help for me. I have a deadline
as sunday and today is saturday. So, sir please do
reply.
Thank you.
With Regards,
Poonam
India.
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