We're about to use LSM to mirror all our system disks. All the system are
using ADVFS for the root and usr partitions. var is under /usr and is NOT a
separate file system.
I've already configured the kernel to add LSM support (we once removed it
with volunroot and also removed the subsets, had to reinstall. I know we
should not have removed it) and I will rebuild the kernel as soon as we
have a chance to get some down time.
I've read the LSM documentation and there are still a couple of things that
puzzle me:
We do not want to use LSM system wide, all we want to do with it is mirror
our system disks (All the other disks are under 2 HSZ40's in dual redundant
config with variour RAID levels) because they are a weakness in our
systems. The whole system disks are actually used (partion a is root, b is
swap and g is usr).
There is a small h partition with size 1024 left on the disk (I suppose it
was there when the LSM was installed before on the systems)
My question is:
On a particular system, if you want to mirror ALL of the system disk
partitions (root, swap and usr), do you need more than 2 disks at all ?
When I read the doc about lsmsetup, they tell you that you have to tell LSM
where to install the rootdg volume group, can it be on my system disk
(Remember, it is almost full !)
If it is possible to mirror the system disk with only one additional unit
(including the space occupied by rootdg) what is the best way for us to do
it ?
Does rootdg have to exist to mirror the root, swap and usr partitions
anyway ? We will be using voladvfsencap (or something like this) to
encapsulate the existing partitions.
As usual, Thanks to everyone !
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Guy E Dallaire, SysAdmin, DBA
Le Directeur General des Elections du Quebec, QC, Canada
Phone: (418) 646-8618
Fax: (418) 644-9624
** "Honni soit qui disco pense"
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Received on Wed Jun 04 1997 - 20:44:18 NZST