09-26-2012
USB RAID 5 Problem on Joli OS 1.2 (Ubuntu) using mdadm
Hi All,
I have been trying to create a USB RAID 5 using mdadm tool on Joli OS 1.2 (Ubuntu) but with no luck. I cannot even get pass the creation of array device (/dev/md0) and superblock. I am using 3 USB keys (2 16.4 GB kingston and 1 16GB sandisk).
My steps are:
root@gokopjolicloud:/home/gokop/RAID# mknod /dev/md0 b 9 0 |
root@gokopjolicloud:/home/gokop/RAID# mdadm --create --verbose /dev/md0 --level=5 --raid-devices=3 /dev/sd[bcd]1 --auto=md |
mdadm: layout defaults to left-symmetric |
mdadm: chunk size defaults to 64K |
mdadm: Cannot open /dev/sdb1: Device or resource busy |
mdadm: Cannot open /dev/sdc1: Device or resource busy |
mdadm: Cannot open /dev/sdd1: Device or resource busy |
mdadm: create aborted |
root@gokopjolicloud:/home/gokop/RAID# mdadm --examine /dev/md0 |
mdadm: No md superblock detected on /dev/md0. |
root@gokopjolicloud:/home/gokop/RAID# cat /proc/mdstat |
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] |
unused devices: <none> |
I have googled a lot with suggestions to change boot loader parameters to "nodmraid" , etc but with no luck. Any one any solutions?
Kind regards
Powell
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