Take the 2-minute tour ×
Ask Ubuntu is a question and answer site for Ubuntu users and developers. It's 100% free, no registration required.

I have 3 hard drives in my machine. Two of them are 1TB drives with my old home partition on a software RAID1. I installed an SSD as a 3rd drive with a fresh Ubuntu 10.10 currently running. I now try to mount my old home partition, which gives me an error:

$ mount -t reiserfs /dev/sda5 /mnt/oldhome
mount: special device /dev/sda5 does not exist

fdisk shows me that all partitions are there. /dev has sda and sdb in it, but not the partitions on them.

Any ideas?

edit:

blkid shows me the following:

/dev/sda: TYPE="isw_raid_member" 
/dev/sdb: TYPE="isw_raid_member" 
/dev/mapper/isw_eahifbiigj_datadump1: UUID="247dbff9-236f-4fa7-a0d4-1f060d973a3e" TYPE="reiserfs" 
/dev/sdc1: UUID="6ba699d7-caaa-4a87-9deb-e7aca73984de" TYPE="ext4"

I can mount the third one, which contains some orphaned partition, living on sda1.

share|improve this question
add comment

2 Answers

DM-RAID (the variant of RAID in use here, sometimes also known as SATA RAID, BIOS RAID, or fake RAID) creates a separate device for the whole array and suppresses the partitions for the component devices. In other words, /dev/sda5 is only the redundant half of your old home partition on your first disk, rather than the whole thing.

On Ubuntu 10.10, I believe that partition 5 of your array should be on /dev/mapper/isw_eahifbiigj_datadump15. From Ubuntu 11.04, this will move to /dev/mapper/isw_eahifbiigj_datadump1p5.

share|improve this answer
    
The next day, suddenly everything is as I had expected before. No clue, what happened. /dev/mapper contains only one file: control. –  rausch Apr 23 '11 at 6:12
    
So, after many problems after updating to 11.04, I decided to do a reinstall with 11.04. Now I have the following entries in /dev/mapper: control, cryptswap1 -> ../dm-3, isw_eahifbiigj_datadump -> ../dm-0, isw_eahifbiigj_datadump1 -> ../dm-1, isw_eahifbiigj_datadump2 -> ../dm-2, with none of them being the md-raid or part of it. –  rausch May 4 '11 at 5:55
    
Sometimes the raid is there, sometimes it isn't. Is there an mdadm replacement, that interferes with mdadm? Should I remove it? –  rausch May 6 '11 at 5:10
add comment

Fixed similar problem by changing the mount line in /etc/fstab from /dev/mapper/isw_Volume01 to /dev/mapper/isw_Volume0p1

NOTE! The extra small "p" in there. I.e Volume01 -> Volume0p1

share|improve this answer
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.