Re: to lvm or not to lvm?
- From: Yuriy Padlyak <yura@xxxxxxxxxx>
- Date: Thu, 26 Jul 2007 13:51:45 +0300
Hi guys,
No one can help me? :)
Yuriy Padlyak wrote:
Hi again!
Have found some time to do it all. Didn't want to reinstall everything, done everything as you suggested except /boot is still on "160GB drive"
without raid :-(, now I'm trying to find out how to put it on RAID :).
Does anyone have any idea how to make it safely?
Also all file systems are in one VG now, wondering how to split them.
Yuriy
Douglas Allan Tutty wrote:On Fri, May 11, 2007 at 09:54:41AM +0300, Yuriy Padlyak wrote:
Douglas Allan Tutty wrote:
On Sun, May 06, 2007 at 12:33:44PM +0300, Yuriy Padlyak wrote:I'm preparing main disks. I have 160GB and 60GB drives. I have plan to make 60GB raid1 and 100GB for not very valuable data on rest of the 160GB drive. Now my VG(consisting all data) is on temporary 320GB drive and my /boot on ext3 partition is om 160GB.
Thank you for your reply. Looks like you're suggesting installation, but I have Etch 4.0 installed already. Wondering if it's possible to put existent /boot on ext3 partition and LVM volume group on RAID1. Or possibly it will be easier to reinstall and restore configuration.It all depends on how much extra space you have. Its a little like a
shell game with clear shells. If you give us your current drive(s) layout including free space, and
your goal layout, perhaps we can help you with an implementation map.
I've totally forgotton how your drives are currently set up so I won't
make any if,then,else suggestions.
Have additional hard drive, which can store any data temporary, while
What I want is to put that /boot on raid1 along with very valuable data from temporary drive (VG) and not very valuable data on that 100GB not raid part. Everything except /boot should be on LVM.
Hope my goal is clear now :)
I don't have any experience setting up raid/LVM from anything other than
the installer: I set it up there and haven't had to touch it. So if it
were me and I had the netinst.iso or CD-1, I would do a minimal
reinstall on your two target disks and have ignore your 320 GB drive,
BUT I also don't have any experience of verifying how to get a new
install to find an existing LVM. So read lots of man pages, and
consider backing up your data to a tarball on either a raw device or a
file on a filesystem, either way to that 320GB drive. Either way, read
the raid HOWTOs and the LVM HOWTO.
Your disk layout seems good:
60 GB drive partitions:
1 32 MB for raid1 md0
2 59968 MB for raid1 md1
160 GB drive partitions:
1 32 MB for raid1 md0
2 59968 MB for raid1 md1
3 remainder for LVM, VG-stripe
this allows you later to add a device to this VG either
to extend the size or migrate data if this drive starts
to fail.
Raid setup:
md0 filesystem /boot
md1 for LVM VG-mirror
LVM setup:
VG-mirror:
LV-root 384 MB /
LV-usr 4 GB /usr
LV-var 6 GB /var
LV-home ?? /home
VG-stripe:
LV-?? ?? ??
Doug.
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