Mufit Eribol wrote:
Toby Bluhm wrote:
Mufit Eribol wrote:

I have a LV on RAID mounted as /mnt/raid. Then /mnt/raid/var is symlinked to /var.

I was afraid you were going to say that.


Go back to single user mode.

mkdir /new_var
cd /mnt/raid/var
tar cf - . | ( cd /new_var ; tar xvf - )

Make sure both dirs look the same.

Change the link to /new_var. Or remove the old link & mv /new_var /var.

reboot.
Toby, Thank you for this nice tip. It worked perfectly. The server is back in the game again.

Just for my learning experience, I would appreciate if you clarify one point though. Why are you afraid when you hear /mnt/raid/var symlinked to /var?

Because it can complicate a recovery, as you just experienced.

Why did you feel a need to have /var setup as you did? Did you expect to fill it up quickly or a need for speed? You also have /tmp separate - do you expect more than usual activity there?

Perhaps a better question would be - What is the purpose of this machine? If it's a just a fileserver on a home lan, you don't *need* to make it complicated, although learning is fun :-).

Running a very active internet facing box with email, mysql, apache, etc. would probably call for a more complicated setup - which would actually make recovery & security easier/better.



Here is my fstab:
/dev/md2 / ext3 defaults 1 1 <--- md2 Software RAID1 /dev/md1 /boot ext3 defaults 1 2 <--- md0 Software RAID1 /dev/md0 /tmp ext3 defaults 1 2 <--- md1 Software RAID1
tmpfs                   /dev/shm                tmpfs   defaults        0 0
devpts                  /dev/pts                devpts  gid=5,mode=620  0 0
sysfs                   /sys                    sysfs   defaults        0 0
proc                    /proc                   proc    defaults        0 0
LABEL=SWAP-sda3         swap                    swap    defaults,pri=1  0 0
LABEL=SWAP-sdb3         swap                    swap    defaults,pri=1  0 0
/dev/raid_vg0/raid_lv0 /mnt/raid ext3 defaults 0 0 <--- Hardware RAID10

Before, home and var were under /mnt/raid directory and symlinked to /home and /var. Now, both directories were copied to / (md2 software RAID1) as new_home and new_var and /home and /var symlinks are now pointing to these new directories. /mnt/raid (hardware RAID10) which is the main storage of my server is not being used at the moment.

Instead of using links, may as well just mount it where it belongs.


I am planning to have 2 logical volumes (for home and var separately) instead of 1. Then, they will be mounted as separate partitions as /home and /var to /dev/raid_vg0/raid_lv0 and /dev/raid_vg0/raid_lv1, respectively. Is it a good approach? Please advise.



I'm somewhat simple-minded - I like to keep the system that way :-). I split the partitions into 3

  /
  swap
  /home


either on a single disk or mirrored ( swap mirrored too ) - no lvm. For data storage I use lvm on raid on a separate mount point. Not saying you should do the same - it's just what I do.




--
Toby Bluhm
Alltech Medical Systems America, Inc.

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