** Changed in: linux (Ubuntu)
Status: Triaged => Invalid
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Title:
dmraid hangs trying to start ICH9R RAID 5
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Oops, forgot to attach...
** Attachment added: "The results of utilizing mdadm"
https://bugs.launchpad.net/ubuntu/+source/dmraid/+bug/666577/+attachment/2098780/+files/mdadm%20results.zip
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As you wish. Attached are the files Examine, Detail and even Detail-
Platform so you know specifically what I'm working with. Unfortunately,
since my main RAID 5 array became corrupted, I decided it was time to
consolidate both arrays into one so I won't be able to verify any fix of
the code that
Yes, the output of mdadm -E and -D would be interesting.
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Title:
dmraid hangs trying to start ICH9R RAID 5
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Honestly, I don't know why or how it worked, but it did. I used the --examine
--scan to see if it would even recognize the array. Once I realized it
recognized it, I told it to scan and run the array. It told me there were no
super blocks, but it loaded it right up and I was able to mount my
mdadm is for software raid, dmraid is for fakeraid. The two do not mix.
You have been using fakeraid so mdadm should not have anything to do
with it. Did you have mdadm create a software raid array?
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I've done some investigating on my second array by poking around with mdadm.
It seems that there was a slight offset with the partition allignment that
COULD have been the problem. It was offset by 33280 bytes. mdadm seems to
allow me to access both of the arrays correctly though. So I can't
As phillip previously said there is a dm-raid456 on the way (dm-raid is
the module and it exists in 2.6.38 but is still listed experimental).
I believe that most standard RAID5 arrays do work or we would see more bugs
(RAID5 is a common setup with dm).
Obviously yours is a special case and requir
dm-raid45 doesn't work correctly in 11.04 with the default module. It
will not load my RAID arrays. I believe it may have difficulty
distinguishing between the two RAID 5 arrays which both share 3 drives.
As for the one I attempted to compile, that was back in 10.10 when the
module still didn't
Ignore my previous comment, I hadn't read the last couple of comments!
There is still heinz's dm-raid45 module in the ubuntu kernel.
When you say it doesn't work in 11.04 is that with this module or the
one you tried to compile?
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Isn't the raid4-5 driver deprecated?
Ubuntu hasn't used it for 2 releases which is why you had to manually compile
it.
It has now been replaced in the linux kernel by the new kernel driver
'raid456' hasn't it?
Dmraid probably needs to be re-worked to use this newer driver for it to
accept raid5
This bug also affects Ubuntu 11.04 currently in Beta production.
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Title:
dmraid hangs trying to start ICH9R RAID 5
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What I was attempting to compile above was the Ubuntu kernel from the
sources provided by Synaptic. Once it hit the experimental Ubuntu dm-
raid4-5 driver you mentioned, it errored very specifically on the dm-
region-hash.c file. Looking at the compilation output, it seems that
most, if not all o
** Also affects: baltix
Importance: Undecided
Status: New
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Title:
dmraid hangs trying to start ICH9R RAID 5
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I have no idea what you were trying to compile or why you got errors,
but yes, the problem is obviously in the dm-raid4-5 driver, which is an
experimental driver that Ubuntu added. Upstream is working on getting a
proper raid456 driver into 2.6.38, but that will be for natty+1.
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What I'm trying to get at is that I'm pretty certain that the source of the
leak is in the ubuntu patches. Specifically,
../ubuntu/dm-raid4-5/dm-region-hash.c
Mr. Susi, if you could please take a look at my compilation output from above
and see if that helps track the error, I would appreciate
Consider yourself verified. Also, see my previous comment about my
attempt at recompiling my kernel and how it failed at the ../ubuntu/dm-
raid4-5/dm-region-hash.c file. It's comment #5 to be exact.
Dec 30 03:05:11 ubuntu kernel: [ 22.205128] hda-intel: IRQ timing workaround
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