John Andersen wrote:
On Sunday 11 February 2007, Fajar Priyanto wrote:
On a side note, it's even better if we use LVM, so that when in the future we run out of space, we can "expand" it into another disk seamlessly. HTH,
LVM has some serious risk involved.
I think you're confusing issues.
Let us assume that in any give day you have a 1 in 3,000 chance of a drive failure.
Now assume LVM is in use, and the LVM is made up of 3 drives. You now have 3 in 3000 chance of failure,
The 3 in 3000 is because you have changed from one drive to three drives. It has nothing to do with using LVM.
and any single failure may take out your entire file system,
If you're using multiple drives and don't want single failures to cause errors, then run RAID :) That's what it's for! Again, that is a separate issue to whether or not you run LVM on the RAID.
since you can never predict where a file or portions of a file will reside.
You can't predict where a file will live in a conventional partition either (well you can but only by emulating the particular filesystem's allocation method and you use the same filesystems within logical volumes so the issue is exactly the same). I guess you're confusing file position with logical volume position. You might want to read: http://tldp.org/HOWTO/LVM-HOWTO/ particularly about volume groups and about mapping modes. Cheers, Dave -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org