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SubjectLoop device and smbmount: I/O error
From
Date
Hello!

I've tried to mount an ext2 filesystem image (ca. 1GB) stored on a WIN
computer via the loop device under 2.4.22:

(Initially the file scratch2.img is filled with 0s.)

#smbmount //win02/scratch /pro -o username=sambadisk,workgroup=MYDOMAIN
#losetup /dev/loop0 /pro/scratch2.img
#mke2fs /dev/loop0
#mount /dev/loop0 /scratch -t ext2

#cp -r linux-2.4.22 /scratch
cp: cannot create directory `/scratch/linux-2.4.22/drivers/video/sis':
Input/output error
cp: cannot create directory `/scratch/linux-2.4.22/drivers/video/aty':
Input/output error

etc.

#dmesg

EXT2-fs error (device loop(7,0)): read_inode_bitmap: Cannot read inode
bitmap -
block_group = 4, inode_bitmap = 131073
EXT2-fs error (device loop(7,0)): read_block_bitmap: Cannot read block
bitmap -
block_group = 4, block_bitmap = 131072




With 'mount /dev/loop0 /scratch -t ext2 -o sync':

#mkdir somedir
mkdir: cannot create directory `somedir': Input/output error

#dmesg
IO error syncing ext2 inode [loop(7,0):0001e6cf]
IO error syncing ext2 inode [loop(7,0):0001e6cf]

I've found a similar problem in the kernel archives with the topic 'Loop
devices under NTFS' (Aug 27-28 2002) There was mentioned a patch for
2.5.31 to fix this problem. Hasn't been it applied to stable versions
since then? Is there a patch for current versions?


Thanks
------------------------
Gabor Kovacs, PhD student
Eotvos University, Budapest, Hungary

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