SUMMARY: How to mirror a failing drive?

Thanks to:

	Guy B. Purcell
	Kevin Boykin
	Johnny Hall
	Darren Moulding

Several folks suggested using dd to copy the data to a partition on another
drive, instead of trying to get disksuite to mirror the data.  Unfortunately
the problematic drive failed completely before I was able to try this.
Fortunately, though, I was able to get a backup job completed just an hour
before the drive failed completely.  (We do regular backups but it is nice
to be able to restore from something so recent.)  I am now waiting for a
restore job to complete.

Thanks again for your input!

Doug



> -----Original Message-----
> From: Granzow, Doug (NCI) 
> Sent: Wednesday, May 22, 2002 11:55 AM
> To: Sun Managers List
> Subject: How to mirror a failing drive?
> 
> 
> I have a Disksuite 4.2 metadevice that, due to a string of 
> events, contains
> only one submirror.  One of the stripes on that mirror is now 
> marked as
> "Last Erred" in disksuite.  It is still online but I 
> occasionally get errors
> like the following in /var/adm/messages:
> 
> May 22 11:18:20 server      Error for Command: read           
>          Error
> Level: Fatal
> May 22 11:18:20 server unix:        Requested Block: 1757020
> Error Block: 1757117
> May 22 11:18:20 server unix:        Vendor: FUJITSU
> Serial Number: 0019530620  
> May 22 11:18:20 server unix:        Sense Key: Media Error
> May 22 11:18:20 server unix:        ASC: 0x13 (address mark 
> not found for
> data field), ASCQ: 0x0, FRU: 0x0
> May 22 11:18:20 server unix: WARNING: md: d52: read error on
> /dev/dsk/c0t12d0s6
> 
> When I try to attach another concat/stripe as a new 
> submirror, it starts to
> resync, but eventually gives up and leaves the new submirror 
> in "Attaching"
> status -- it never makes it to "OK".  Is there any way to get 
> Disksuite to
> mirror what it *can* read, so that when I replace this disk, 
> I do not lose
> *all* of the data?
> 
> Thanks,
> Doug
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> sunmanagers@sunmanagers.org
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