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Old 06-28-2009, 11:29 PM   #1
laufandreas
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Registered: Jun 2009
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Opensuse 11 software RAID 5 failed: how to recover ?


Hi there!
A friend has a dell 4550 http://support.dell.com/support/edoc...cs.htm#1101572 with Opensuse 11 on it. It has 4 drives, one to boot, three 160 Gig for the RAID 5 array.

After hooking up a monitor (VNC does not work at that stage) I can read the following error message:
"repair filesystem"

I am searching and reading for the past days and find no solution for this. Right now I am making a 1:1 backup of the drives before I go on fiddeling with them.

I tried forcing the array (also with that "echo" thingi), dis- and reattaching the drives (both hardware and software), but all has failed thus far.

the system responds with some messages, but searching those yielded no practical info:
"bitmap file is out of date" (151/150)
"mdadm: device /dev/sdb not suitable for any style of array"
"Uuu" 1

It seems that all drives are OK hardwarewise.

During my research many answers were on this site, and I am amazed by the helpfulness of the "elders" here.

I am totally new to Linux unfortunately, but try to learn this amazing OS.

So I registered and here it comes:

1) when the (failed) boot process stops (with the "repair filesystem" message) some lines had indicated some "failed" but they pass very fast and I cannot scroll back to see what they say. How can I see what was going on? I tried Ctrl-S etc. during the boot process to pause the messages in vain.


2) has anybody come across those "bitmap file is out of date" and "mdadm: device /dev/sdb not suitable for any style of array"?


3) what is the correlation of sdb to the actual IDE port? I have sda...sdd. Is sda the primary master and sdb the primary slave? I.e. which drive is sdb with a 2 port IDE configuration?


4) some places I read that booting with Knoppix might help recovering the data on the RAID5, is that true? (I am d/l Knoppx right now)


Please, if you are kind enough to help, give me instructions on what I should type. I tried "Dir" and "type" in the beginning (I know I know (NOW)), just so you know what my knowledge level with Linux is...
Consider me as your extended fingers and eyes.

Thank you very much.
 
Old 06-29-2009, 02:17 AM   #2
govert
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Registered: May 2005
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Judging from your linux knowledge and the complexity of your problem, I would seriously consider starting looking for someone who knows linux and raid and inviting them over (IRL) for a cup of coffe & cake. (I'm a 36-year old Swede. Adjust menu according to age and cultural preference.)

I am sure the LQ community will do it's outmost to assist you, but unless there is a really simple fix out there which is easy to spot, it's going to take quite a while until you have been guided to provide all the relevant information necessary to diagnose and resolve our problem.

Best of luck!
 
Old 06-29-2009, 08:17 AM   #3
laufandreas
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Registered: Jun 2009
Posts: 3

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Hi Govert,
thanks for the hint.
I'll be definitely awarding whoever can solve this. I'm in West Los Angeles.

It seems that a backup was made 10 days ago, so not all is lost.

That makes it not that urgent, but still necessary.

I read about mdadm (wow!) and am more lost than before.

After backing up the drives (none had a hardware error BTW) I tried several things, but again, none worked.

Do you have a suggestion for the first question, on how to look at the error messages which scroll by very fast?

That would be the first step, do you agree?

Again, I am open for any guidance, thanks!
 
Old 06-30-2009, 04:51 AM   #4
laufandreas
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Registered: Jun 2009
Posts: 3

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Another member is asking a very similar question here
http://www.linuxquestions.org/questi...e-11.1-736416/
so if any kind soul would help us, you'd help out two with one stroke.
Plus the many others who would search for this.


Meanwhile I continue searching/reading about similar issues, and tried out whatever (if at all) was suggested in each (roughly 10 approaches), but thus far none worked.

I am now trying to understand Vi (and they say aliens haven't been on this planet) to be able to access the output I had mentioned.

Again, any help on these questions would be great:

1) when the (failed) boot process stops (with the "repair filesystem" message) some lines had indicated some "failed" but they pass very fast and I cannot scroll back to see what they say. How can I see what was going on? I tried Ctrl-S etc. during the boot process to pause the messages in vain.


2) has anybody come across those "bitmap file is out of date" and "mdadm: device /dev/sdb not suitable for any style of array"?


3) correlation of sdb to the actual IDE port? Found that meanwhile, thanks.

4) Knoppix : tried that meanwhile, does not help, same issue.
 
  


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