Re: trouble creating array
So anyways, I created my RAID device, and waited about 4 hours for it to sync,
and all was happy with the world, so I went to bed. This morning, I made an
ext3 file system on it, set up some directories, set the acls, added to my
smb.conf file, mapped a drive, and after about 4Gb copied onto it, I got an
error. Checking in the logs, there was an error about trying to access past the
physical extent.
I did a quick check of mdstat, and one of the array disks was down, and an dm
device had shown up in the array configuration. A quick dmsetup -C info again
shows that mpath0p1 has returned again.
Does anyone know why it keeps appearing, and more importantly, is there any way
of persuading it not to...?
Thanks again for any help and pointers people can give...
Graham
- Original Message
From: jahammonds prost [EMAIL PROTECTED]
To: Neil Brown [EMAIL PROTECTED]
Cc: Justin Piszcz [EMAIL PROTECTED]; linux-raid@vger.kernel.org
Sent: Tuesday, 27 February, 2007 8:10:36 PM
Subject: Re: trouble creating array
Just an update for everyone on this (and for the archives), Did some digging,
and had a look at the device mapper config
# dmsetup -C info
Name Maj Min Stat Open Targ Event UUID
mpath0 253 0 L--w11 0
VolGroup00-LogVol01 253 3 L--w11 0
LVM-2sahQifzg9s9k0xSkpnzpGCYd7JNVXzUof6XmQ0fhzJ6jIbQLciAbm6lJLwK0Aex
VolGroup00-LogVol00 253 2 L--w11 0
LVM-2sahQifzg9s9k0xSkpnzpGCYd7JNVXzUt3sJ3nwvJF8cr6ebv5AdnY0j4Ajl6U0I
mpath0p1 253 1 L--w01 0
Those 2 multipath devices shouldn't have been there, and indeed mpath0p1 were
my 2 recalcitrant disks.
# dmsetup -C remove mpath0p1
# dmsetup -C remove mpath0
And they were both gone (you need to start at the bottom of the tree when
removing them).
A quick fdisk of my disks to create sdb1 and sdc1 partitions, and my array will
be synched in 204 mins...:)
Thanks to everyones help for pointing me in the right direction.. It was a trip
I would have preferred not to have made, but like all trips like that, it's
been illuminating.
Thanks again.
Graham
- Original Message
From: Neil Brown [EMAIL PROTECTED]
To: jahammonds prost [EMAIL PROTECTED]
Cc: Justin Piszcz [EMAIL PROTECTED]; linux-raid@vger.kernel.org
Sent: Sunday, 25 February, 2007 11:40:26 PM
Subject: Re: trouble creating array
On Sunday February 25, [EMAIL PROTECTED] wrote:
Any ideas how to find out what has it open? I can happily write all over the
disk with dd... I can create and delete the partition, and it's all good... I
will try deleting the sd{b,c}1 partitions, reboot, and see what happens.
ls -l /sys/block/*/holders/* ??
NeilBrown
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Re: trouble creating array
On Mon, Feb 26, 2007 at 03:40:32AM -0800, jahammonds prost wrote: Ah ha # ls -l /sys/block/*/holders/* lrwxrwxrwx 1 root root 0 Feb 26 06:28 /sys/block/sdb/holders/dm-0 - ../../../block/dm-0 lrwxrwxrwx 1 root root 0 Feb 26 06:28 /sys/block/sdc/holders/dm-0 - ../../../block/dm-0 which I am assuming is dmraid? I did a quick check, and no, it is device-mapper # dmraid -r No RAID disks use dmsetup ls L. -- Luca Berra -- [EMAIL PROTECTED] Communication Media Services S.r.l. /\ \ / ASCII RIBBON CAMPAIGN XAGAINST HTML MAIL / \ - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: trouble creating array
Just an update for everyone on this (and for the archives), Did some digging,
and had a look at the device mapper config
# dmsetup -C info
Name Maj Min Stat Open Targ Event UUID
mpath0 253 0 L--w11 0
VolGroup00-LogVol01 253 3 L--w11 0
LVM-2sahQifzg9s9k0xSkpnzpGCYd7JNVXzUof6XmQ0fhzJ6jIbQLciAbm6lJLwK0Aex
VolGroup00-LogVol00 253 2 L--w11 0
LVM-2sahQifzg9s9k0xSkpnzpGCYd7JNVXzUt3sJ3nwvJF8cr6ebv5AdnY0j4Ajl6U0I
mpath0p1 253 1 L--w01 0
Those 2 multipath devices shouldn't have been there, and indeed mpath0p1 were
my 2 recalcitrant disks.
# dmsetup -C remove mpath0p1
# dmsetup -C remove mpath0
And they were both gone (you need to start at the bottom of the tree when
removing them).
A quick fdisk of my disks to create sdb1 and sdc1 partitions, and my array will
be synched in 204 mins...:)
Thanks to everyones help for pointing me in the right direction.. It was a trip
I would have preferred not to have made, but like all trips like that, it's
been illuminating.
Thanks again.
Graham
- Original Message
From: Neil Brown [EMAIL PROTECTED]
To: jahammonds prost [EMAIL PROTECTED]
Cc: Justin Piszcz [EMAIL PROTECTED]; linux-raid@vger.kernel.org
Sent: Sunday, 25 February, 2007 11:40:26 PM
Subject: Re: trouble creating array
On Sunday February 25, [EMAIL PROTECTED] wrote:
Any ideas how to find out what has it open? I can happily write all over the
disk with dd... I can create and delete the partition, and it's all good... I
will try deleting the sd{b,c}1 partitions, reboot, and see what happens.
ls -l /sys/block/*/holders/* ??
NeilBrown
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Re: trouble creating array
Ah ha
# ls -l /sys/block/*/holders/*
lrwxrwxrwx 1 root root 0 Feb 26 06:28 /sys/block/sdb/holders/dm-0 -
../../../block/dm-0
lrwxrwxrwx 1 root root 0 Feb 26 06:28 /sys/block/sdc/holders/dm-0 -
../../../block/dm-0
which I am assuming is dmraid? I did a quick check, and
# dmraid -r
No RAID disks
Doesn't look like there is anything defined. I know that both sdb and sdc (as
well as sda) are connected to SATA cards which support RAID under windows...
However, I know there is no arrays defined on them on the cards (at least not
by me)... I will bounce the server again and check.
Graham
- Original Message
From: Neil Brown [EMAIL PROTECTED]
To: jahammonds prost [EMAIL PROTECTED]
Cc: Justin Piszcz [EMAIL PROTECTED]; linux-raid@vger.kernel.org
Sent: Sunday, 25 February, 2007 11:40:26 PM
Subject: Re: trouble creating array
On Sunday February 25, [EMAIL PROTECTED] wrote:
Any ideas how to find out what has it open? I can happily write all over the
disk with dd... I can create and delete the partition, and it's all good... I
will try deleting the sd{b,c}1 partitions, reboot, and see what happens.
ls -l /sys/block/*/holders/* ??
NeilBrown
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Re: trouble creating array
Rebooted and checked that there were no arrays defined. I have 2 cards in the
server - one is a VIA based card, with a single Maxtor, the other this a
Promise based card, with 2 Maxtors by Seagate on it. I've been into the config
utilites on both cards, and none of them have arrays defined on them.
- Original Message
From: Neil Brown [EMAIL PROTECTED]
To: jahammonds prost [EMAIL PROTECTED]
Cc: Justin Piszcz [EMAIL PROTECTED]; linux-raid@vger.kernel.org
Sent: Sunday, 25 February, 2007 11:40:26 PM
Subject: Re: trouble creating array
On Sunday February 25, [EMAIL PROTECTED] wrote:
Any ideas how to find out what has it open? I can happily write all over the
disk with dd... I can create and delete the partition, and it's all good... I
will try deleting the sd{b,c}1 partitions, reboot, and see what happens.
ls -l /sys/block/*/holders/* ??
NeilBrown
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Re: trouble creating array
On Sun, 25 Feb 2007, jahammonds prost wrote:
Just built a new FC6 machine, with 5x 320Gb drives and 1x 300Gb drive. Made a
300Gb partition on all the drives /dev/hd{c,d,e} and /dev/sd{a,b,c}... Trying
to create an array gave me an error, since it thought there was already an
array on some of the disks (and there was an old one).
I decided to clear off the superblock on the drives with mdadm --zero-superblock on all
the drives. It worked fine on all drives, except for /dev/sd{b,c)1, which returns an
error mdadm: Couldn't open /dev/sdb1 for write - not zeroing. There doesn't
seem to be a problem with the drive, as I've run a non destructive badblocks on it, and
also done a dd if=/dev/zero of=/dev/sdb1 on it, and Ive written out 300Gb onto the
partition.
When I try and create an array using these 2 partitions, I get an error
mdadm: Cannot open /dev/sdb1: Device or resource busy
mdadm: Cannot open /dev/sdc1: Device or resource busy
and it aborts. I've double checked that the drives aren't mounted anywhere.
There's nothing in /var/log/messages either...
Any suggestions where to check next?
Graham
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Do you have an active md array?
mdadm -S /dev/md0
mdadm -S /dev/md1
mdadm -S /dev/md2
.. etc
lsof | egrep '(sdb|sdc)'
Something thinks its in use, that is why you cannot format it/make it part
of a new array, a reboot would also fix the problem.
Justin.
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Re: trouble creating array
Do you have an active md array?
mdadm -S /dev/md0
Nothing was showing up in /proc/mdstat, but when I try and stop md0, I get this
# mdadm -S /dev/md0
mdadm: stopped /dev/md0
lsof | egrep '(sdb|sdc)'
I had tried that before, and nothing is showing. A reboot didn't help, but
something is definately keeping it open. I tried an mkfs
]# mkfs.ext3 /dev/sdb1
mke2fs 1.39 (29-May-2006)
/dev/sdb1 is apparently in use by the system; will not make a filesystem here!
Any ideas how to find out what has it open? I can happily write all over the
disk with dd... I can create and delete the partition, and it's all good... I
will try deleting the sd{b,c}1 partitions, reboot, and see what happens.
Graham
- Original Message
From: Justin Piszcz [EMAIL PROTECTED]
To: jahammonds prost [EMAIL PROTECTED]
Cc: linux-raid@vger.kernel.org
Sent: Sunday, 25 February, 2007 5:35:33 PM
Subject: Re: trouble creating array
On Sun, 25 Feb 2007, jahammonds prost wrote:
Just built a new FC6 machine, with 5x 320Gb drives and 1x 300Gb drive. Made a
300Gb partition on all the drives /dev/hd{c,d,e} and /dev/sd{a,b,c}... Trying
to create an array gave me an error, since it thought there was already an
array on some of the disks (and there was an old one).
I decided to clear off the superblock on the drives with mdadm
--zero-superblock on all the drives. It worked fine on all drives, except for
/dev/sd{b,c)1, which returns an error mdadm: Couldn't open /dev/sdb1 for
write - not zeroing. There doesn't seem to be a problem with the drive, as
I've run a non destructive badblocks on it, and also done a dd if=/dev/zero
of=/dev/sdb1 on it, and Ive written out 300Gb onto the partition.
When I try and create an array using these 2 partitions, I get an error
mdadm: Cannot open /dev/sdb1: Device or resource busy
mdadm: Cannot open /dev/sdc1: Device or resource busy
and it aborts. I've double checked that the drives aren't mounted anywhere.
There's nothing in /var/log/messages either...
Any suggestions where to check next?
Graham
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Do you have an active md array?
mdadm -S /dev/md0
mdadm -S /dev/md1
mdadm -S /dev/md2
.. etc
lsof | egrep '(sdb|sdc)'
Something thinks its in use, that is why you cannot format it/make it part
of a new array, a reboot would also fix the problem.
Justin.
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Re: trouble creating array
On Sunday February 25, [EMAIL PROTECTED] wrote:
Any ideas how to find out what has it open? I can happily write all over the
disk with dd... I can create and delete the partition, and it's all good... I
will try deleting the sd{b,c}1 partitions, reboot, and see what happens.
ls -l /sys/block/*/holders/* ??
NeilBrown
-
To unsubscribe from this list: send the line unsubscribe linux-raid in
the body of a message to [EMAIL PROTECTED]
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