Re: Can a (second) hard disc consist of only 1 extended/logical partition? Or is at least one primary necessary?

Andrew Gideon staggered into the Black Sun and said:
On Thu, 24 Apr 2008 14:14:54 +0000, Dances With Crows wrote:
LVM is orthogonal to filesystems.
If you want to be pedantic, that's true.

This is Usenet, pedantry is assumed (-: .

You can't umount / while the system is running. If / is on an LV
which resides on a PV, you can move it using pvmove.
I guess I don't understand your point.

You have 2 PVs, /dev/sda2 and /dev/sdb2. These PVs are in a single VG
called myvg. /dev/sda is old and small, and you want to remove it and
replace it with a bigger disk. However, / is on the LV /dev/myvg/root .
How do we replace /dev/sda while the system is running? If there are
enough free extents on /dev/sdb2, we just "pvmove /dev/sda2" which takes
a while, followed by "vgreduce myvg /dev/sda2".

No umounting of anything is necessary. The hard part is having a PV
with enough free extents, because even with LVM, the steady state of
disks is "full".

One can move / with the system down regardless of whether it is in an
LVM volume.

Yes, but only LVM allows you to move / while the system is up.

You've never had to deal with brain-damaged suits who think that
I.Exploder is the only browser in existence?
I'm careful about the work I agree to do. And where I work, the two
owners have MS degrees in computer science, not "business science" (or
whatever you'd call that studied to achieve an MBA {8^).

Careful. You can be employed by clueful people, then clueless dolts
with more money can come in, systematically marginalize all the people
who know things, and enact moronic policies that cost tons of money
while providing no discernable benefit to the users. (It happened at my
last job, and it's a big part of why they'll be bankrupt within a year.)

--
If you're looking for trouble, I can offer you a wide selection.
My blog and resume: http://crow202.dyndns.org:8080/wordpress/
Matt G|There is no Darkness in Eternity/But only Light too dim for us to see
.

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