From owner-freebsd-stable  Thu Jul  5 22:51:32 2001
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To: "Juha Saarinen" <juha@saarinen.org>
Cc: freebsd-stable@FreeBSD.ORG
Subject: Re: Disk recovery pointers, please 
In-Reply-To: <036c01c105ce$7d0f96a0$0a01a8c0@den2> 
From: Chris Fedde <chris@fedde.littleton.co.us>
Date: Thu, 05 Jul 2001 23:51:19 -0600
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On Fri, 6 Jul 2001 15:48:16 +1200  "Juha Saarinen" wrote:
 +------------------
 | Trying to sort out a server that upon rebooting comes up with:
 | 
 | /dev/da1s1d: CANNOT READ: BLK 16
 | /dev/da1s1d: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY
 | ...
 | THE FOLLOWING FILE SYSTEMS HAD AN UNEXPECTED INCONSISTENCY:
 | 
 | 	/dev/da1s1d (/data)
 | 
 | Automatic file system check failed . . . help!
 | 
 | So, I run fsck manually, and get:
 | 
 | CANNOT READ BLK 16
 | CONTINUE [yn]
 | 
 | If I answer 'y' to that, I get:
 | 
 | THE FOLLOWING DISK SECTORS COULD NOT BE READ:
 | 
 | 16, 17, 18 (all the way to 31).
 | 
 | /dev/da1s1d: NOT LABELED AS A BSD FILE SYSTEM (unused).
 | 
 | Couldn't find anything useful in the archives or on the Web apart from
 | "reformat"... :-(
 | 
 +------------------

You can try to get fsck to succeed by using an alternate super
block.  Get a list of superblocks on the drive using newfs -N
/dev/da1s1d. then feed one of these into  fsck -yb /dev/da1s1d If
this succeeds count your self lucky.  If it fails it is time to
reformat the drive and start recovering your backups.  You do have
a backup don't you?

Good Luck
--
    Chris Fedde

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