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Old 01-16-2008, 12:36 PM
Klim Samgin
 
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Default Re: RAID recover on Sun StorEdge A1000

"Kurt Duncan" <kurt.duncan@lsil.com> wrote in message news:<bqnluq$c0m$1@news.lsil.com>...
> "Klim Samgin" <klimsamgin@yahoo.com> wrote in message
> news:f5cc7e25.0312030634.3edaf7b9@posting.google.c om...
> > Raid Manager software 6.22.01.14
> > shows error for that disk:
> > "A drive failed because it experienced a write failure"
> >

>
> If the controller cannot write to a destination drive (as the message
> indicates), the drive is spun down. With RAID-0, this means at least one
> block of data did not get written to disk. If the system crashed at this
> point, probably many blocks did not get written to disk. If there was an
> easy way to trick the volume back into existence, you would have no
> confidence that whatever data remained, was intact, nor where any missing
> blocks might be.
>
> Your best bet is to delete the LUN, recreate it, reformat, reload from
> tape...
> Backups are always a requirement, but doubly so on RAID-0.
>
> And I'd think real hard about re-using the drive that failed. I wouldn't
> ever use it in another RAID-0 LUN, but I'm not sure I'd be too happy with it
> in any other configuration, either.


Hi!

Thank you for your answer.

I have halted Sun server with storedge in the evening
and I have turned them on in the morning.
The server can't mount storege than
and I saw this problem.
So, there were no writings when storedge crashes.

This storedge is using to store distributives, cdrom images and so on.
There were many readings, but few writings.
So, the storedge data was consistent at crash moment.

If I have a byte-to-byte copy of the failed drive,
from the same manufacturer, the same model and size, and so on,
why is array manager software marked it "replaced"?
I think, array manager software get this answer from storedge controller.
Why is storedge controller think so?
May be it checks raid disks headers, for example,
reads first sector of every disk, and looking for a label...

If so, I can mark every disk with same label
and I get recovered LUN.

What do you think about this possibility?

Klim.
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