On 2/15/24 16:20, Andy Smith wrote:
Hi,
On Thu, Feb 15, 2024 at 03:59:30PM -0500, gene heskett wrote:
Now the question remains howinhell do I put a label on a drive
such that it does survive making a raid or lvm device with it? To
not have a way to id its the drive in slot n of a multislot rack
stops me in my tracks.
Given that an MD RAID array or a LVM Logical Volume may be spread
across many different underlying storage devices, the question
doesn't make sense. Due to the fact that filesystems go on block
devices, and RAID arrays and LVM LVs can be block devices, a
filesystem label in that instance would represent possibly multiple
underlying storage devices. So step back and tell us what are you
actually trying to achieve, rather than insisting on your X solution
to your Y problem.
Suppose you have the MD array /dev/md42. What are you conceptually
wanting to do with that in relation to labels of some kind? What
information is it that you want?
Support you have LVM logical volume /dev/myvg/mylv. What are you
conceptually wanting to do with that in relation to labels of some
kind? What information is it that you want?
I want to know with absolute certainty, with of the 4 drives in that
raid10, actually has a belly ache. When it has a belly ache. I can't see
any reason on this ball of rock and water, why I should be expected to
replace a drive at a time until the belly ache goes away.
Particularly with these gigastones, I 5 of them but when all are plugged in
there are only 3 becauae there are 2 pairs of matching serial numbers in the
by-id output, by-id sees all 5 drives, but udev see's only the unique
serial numbers. gparted can change the devices blkid, getting a new one from
rng so while you all think that's the greatest thing since bottled beer, I
know better.
Once you explain what information you're trying to get when you
start with an LVM or MD device, I can probably advise how to get it,
but just to make clear: I don't think it's a good idea to continue
to use such broken devices. We don't need to debate that since I
know you've been posting about that a lot and clearly have decided
to push ahead. I just think you haven't seen the end of the problems
with that issue.
Regards,
Andy
Cheers, Gene Heskett, CET.
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.
- Louis D. Brandeis
