Re: What makes /dev/hdb1 say it's mounted/active when it isn't?
On 2 Mar 2004 at 17:47, CW Harris wrote:
> Shouldn't matter, as long as your BIOS can boot it (which it obviously
It can, but is there any possibility that's it's requiring the
controller or HD to be "active" as far as the kernel is concerned? I
can't see how that's the case but my grasp of the mbr and partitions
has always been shakey.
> > mdadm --create /dev/md0 --level=1 --raid-disks=2 missing /dev/hdc1
> ^ ^ ^ ^ ^ ^ ^
> Okay, I haven't used the mdadm (I used raidtools2), but shouldn't this
> be hdb1 missing?
I don't think so, it's straight out of that howto (I pretty sure). I
think it is reserving a first disc, unspecified, as failed, in a two
disc array in which the second disc is active and is /dev/hdc1
I've tried using /etc/raidtab setting up essentially the raid1 config
that's supplied but tweaking to /dev/hdb1 and /dev/hdc1 and ending
with a failed-disk line:
# Sample raid-1 configuration
and that has the same result (I think the /etc/raidtab is spurious
since, as I understand it, this is actually stored in the persistent
> > which worked fine, mkfs -t ext3 /dev/hdc1, mount it to /mnt1,
> and then shouldn't you have a working /dev/md0 to mkfs -t ext3
Sorry, me being stupid in what I wrote, indeed so. I was getting a
working degraded array with one working drive and it was that I
> If above was incorrect, then hdb1 would be part of the (active) RAID?
> so you can't import it again.
cat /proc/mdstat doesn't show it as active:
Personalities : [raid1]
read_ahead 1024 sectors
md0 : active raid1 hdc1
78124928 blocks [2/1] [_U]
unused devices: <none>
I read that as sayng that it's a degraded array currently with just
the one drive in it, /dev/hdc1, and with space for a second.
> I haven't done that much RAID, and not with mdadm. But if my comments
> above are correct, maybe this is your problem?
Much thanks, and I'm happy to be corrected, but I think they're not
the problem though one of them was a typo of mine in the Email,
fdsk'ing the raw drive not the array, that several people have noted.
_ANY_ suggestions welcome: it feels so lame to just use that second
drive to mirror the first with a regular cp -aux / /mnt2 or something
like that, though I'm starting to think that's the time efficient
option given how much time setting up this server has cost me!
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