[SOLVED] Slackware 12.2 + RAID-5 + LVM => Read-write issues during boot
I have 5 1.5TB SATA drives, and out of those I'm going to use 4 for a RAID-5 array (with LVM2) and keep 1 for backup in case any of the other disks should get f*cked up in any way.
Currently, I have installed three of the four disks I will be using. The reason for this, is because I want to learn how to expand a RAID5-array and LVM-volume.
Using the guides located at ftp://ftp.slackware.com/pub/slackwar...EADME_RAID.TXT and ftp://ftp.slackware.com/pub/slackwar...README_LVM.TXT, I was able to create 3 RAID-pools (in software) and installing LVM on top of the pool that was configured with RAID-5.
/dev/md0 -> LVM2 (raid-5)
/dev/md1 -> swap (raid-1)
/dev/md2 -> /boot (raid-1)
/dev/lvm-raid/lvm0 -> /
/dev/lvm-raid/lvm1 -> /home
/dev/lvm-raid/lvm2 -> /mnt/shared
I have now gotten to the point where I'm able to initialize the raid-array and locating the volume groups during boot time.. The problem that has been pestering me for the last three hours, is being able to mount with read-write privileges.
When Slackware (12.2) is booting, I keep getting the error message from /etc/rc.d/rc.S (on line 186 and forward) stating the following: "attempt to remount root device as read-write failed! This is going to cause serious problems". According to this error-message, there should be nothing wrong with the /boot partition, since the initrd loads without problems, and the LVM volume group is mounted (however in read-only mode).
I really don't understand this part, because I am able to boot from the Slackware CD and mount my volumes manually (using mdadm first, followed by vgscan and vgchange, and then mount) without any hassle. Creating and deleting files on the LVM volume groups works like a charm.
If it is of any help, I'm using the ext3 file system on all the volume groups including /dev/md2 where /boot is located. I've also included my lilo.conf and mkinitrd.conf below.
Okey, I've now made some minor changes to mkinitrd.conf to see if that would fix the errors, but it seems like I'm out of luck.
Since I am able to boot the kernel, which resides on /dev/md2, can I safely eliminate LILO from the list of possible problems?
By the way, here are the messages I keep getting when I'm booting the system:
Well, this is quite embarrassing..
I had forgotten to specify which filesystem the volumes were using in /etc/fstab. Adding ext3 to each of the volumes fixed the problem during boot :)
Never mind, I see you've already spotted it.
Glad you got it sorted. :)
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