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Date: Thu, 18 Jul 2002 13:29:35 +0800
From: Ying-Chieh Liao <ijliao@FreeBSD.org>
To: current@FreeBSD.org
Subject: cannot find filesystem superblock ?
Message-ID: <20020718052935.GA358@terry.dragon2.net>
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I build/install world last night
after reboot, one of my filesystem is broken (it uses soft-updates)

when I run fsck on it, it said :

cannot find filesystem superblock

<cut>
** /dev/da0s3e

LOOK FOR ALTERNATE SUPERBLOCKS? yes

USING ALTERNATE SUPERBLOCK AT 32
numdirs is zero, try using an alternate superblock

***** FILE SYSTEM STILL DIRTY *****
</cut>

I've tried alternative superblock (8193 and 16385)

<cut>
Alternate super block location: 8193
** /dev/da0s3e
UNDEFINED OPTIMIZATION IN SUPERBLOCK
SET TO DEFAULT? yes

IMPOSSIBLE MINFREE=3D842226459 IN SUPERBLOCK
SET TO DEFAULT? yes

cannot alloc 3779963748 bytes for blockmap

***** FILE SYSTEM MARKED DIRTY *****
</cut>

<cut>
Alternate super block location: 16385
** /dev/da0s3e
UNDEFINED OPTIMIZATION IN SUPERBLOCK
SET TO DEFAULT? yes

IMPOSSIBLE MINFREE=3D779380589 IN SUPERBLOCK
SET TO DEFAULT? yes

cannot alloc 2355957190 bytes for blockmap

CANNOT WRITE BLK: 0
CONTINUE? yes

THE FOLLOWING SECTORS COULD NOT BE WRITTEN: 0,

***** FILE SYSTEM STILL DIRTY *****
</cut>

anyone got any idea how I can fix it ?
did it mean that I have a bad sector ?
--=20
int i;main(){for(;i["]<i;++i){--i;}"];read('-'-'-',i+++"hell\
o, world!\n",'/'/'/'));}read(j,i,p){write(j/p+p,i---j,i/i);}
					-- IOCCC 1984

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