Re: [Jfsrec-discussion] jfsrec fails during inode scan

[Simon L. <sim...@hi...>]

Hi Stephen,

Im cc:ing the jfsrec list so that these messages will be archived. I see 
a couple of things that could cause this error. jfsrec tries to read 
512bytes off the disk, but it gets 0bytes. This might be due to a 
hardware error, or an error in jfsrec. Does it read beyond the disk 
(i.e., is the partition  smaller than 465Gb or something)? Reading 
directly from a device as you are trying to do is not that well tested. 
It was enabled by a patch from Sonny a week or so ago. I advise you to 
try to make an image file of the disk (preferably using dd_rhelp or the 
like). If it works using an image file, we know that it's the device 
handling that causes this error.

Best regardsSimon

Stephen G skrev:
> Simon,
>
> I tried using jfsrec to recover my fsck'ed up drive (that is also causing fsck.jfs to segfault).  It starts scanning the inodes fine, but when it hits about 30%, it starts spitting out the following output (see below).  I set the terminal to 100000 lines (max in Ubuntu???) but the output goes past this so you can't see the beginning.  Maybe I can try it again and redirect the output to a file if needed.
>
> I've attached all the logfiles as well.  Thanks for any help recovering this drive.  
>
> (I'm now trying to reproduce the crash using another drive and useless data to find out why I keep wrecking my drives).
>
> root@tv:~# jfsrec --device /dev/sda1 --output /mnt/jfs/ --logdir /tmp
>
> ... [thousands of lines] ...
>
> Device::read_blocks: read 0 of 512 bytes at offset 500064294912
> Device::read_blocks: read 0 of 512 bytes at offset 500064296448
> Device::read_blocks: read 0 of 512 bytes at offset 500064295424
> Device::read_blocks: read 0 of 512 bytes at offset 500064296960
> Device::read_blocks: read 0 of 512 bytes at offset 500064295936
> Device::read_blocks: read 0 of 512 bytes at offset 500064297472
> Device::read_blocks: read 0 of 512 bytes at offset 500064296448
> Device::read_blocks: read 0 of 512 bytes at offset 500064297984
> Device::read_blocks: read 0 of 512 bytes at offset 500064296960
> Device::read_blocks: read 0 of 512 bytes at offset 500064298496
> Device::read_blocks: read 0 of 512 bytes at offset 500064297472
> Device::read_blocks: read 0 of 512 bytes at offset 500064299008
> Device::read_blocks: read 0 of 512 bytes at offset 500064297984
> Device::read_blocks: read 0 of 512 bytes at offset 500064299520
> Device::read_blocks: read 0 of 512 bytes at offset 500064298496
> Device::read_blocks: read 0 of 512 bytes at offset 500064300032
> Device::read_blocks: read 0 of 512 bytes at offset 500064299008
> Device::read_blocks: read 0 of 512 bytes at offset 500064300544
> Device::read_blocks: read 0 of 512 bytes at offset 500064299520
> Device::read_blocks: read 0 of 512 bytes at offset 500064301056
> Device::read_blocks: read 0 of 512 bytes at offset 500064300032
> Device::read_blocks: read 0 of 512 bytes at offset 500064301568
> Device::read_blocks: read 0 of 512 bytes at offset 500064300544
> Device::read_blocks: read 0 of 512 bytes at offset 500064302080
> Device::read_blocks: read 0 of 512 bytes at offset 500064301056
> Device::read_blocks: read 0 of 512 bytes at offset 500064302592
> Device::read_blocks: read 0 of 512 bytes at offset 500064301568
> Device::read_blocks: read 0 of 512 bytes at offset 500064303104
> Device::read_blocks: read 0 of 512 bytes at offset 500064302080
> Device::read_blocks: read 0 of 512 bytes at offset 500064303616
> Device::read_blocks: read 0 of 512 bytes at offset 500064302592
> Device::read_blocks: read 0 of 512 bytes at offset 500064304128
> Device::read_blocks: read 0 of 512 bytes at offset 500064303104
> Device::read_blocks: read 0 of 512 bytes at offset 500064304640
> Device::read_blocks: read 0 of 512 bytes at offset 500064303616
> Device::read_blocks: read 0 of 512 bytes at offset 500064304128
> *
> Done searching for inode extents. Invalidated 218692 of 218692 inodes
> 0 inodes left.
> Total number of inodes stored:0
> Number of
>   Directories: 0
>   files: 0
>   symlinks: 0
>   special: 0
>   unallocated: 0
>
>
>
> Saving inodes to file...
>
> 0%   10   20   30   40   50   60   70   80   90   100%
> |----|----|----|----|----|----|----|----|----|----|
>
> Saving invalidated inodes to file...
>
> 0%   10   20   30   40   50   60   70   80   90   100%
> |----|----|----|----|----|----|----|----|----|----|
> ***************************************************
>
>
> Removing unallocated inodes... [Done]
> Total number of inodes stored:0
> Number of
>   Directories: 0
>   files: 0
>   symlinks: 0
>   special: 0
>   unallocated: 0
>
>
>
> Saving inodes to file...
>
> 0%   10   20   30   40   50   60   70   80   90   100%
> |----|----|----|----|----|----|----|----|----|----|
>
> Saving invalidated inodes to file...
>
> 0%   10   20   30   40   50   60   70   80   90   100%
> |----|----|----|----|----|----|----|----|----|----|
> ***************************************************
> Removing duplicatesDone
> Total number of inodes stored:0
> Number of
>   Directories: 0
>   files: 0
>   symlinks: 0
>   special: 0
>   unallocated: 0
>
>
>
> Saving inodes to file...
>
> 0%   10   20   30   40   50   60   70   80   90   100%
> |----|----|----|----|----|----|----|----|----|----|
>
> Saving invalidated inodes to file...
>
> 0%   10   20   30   40   50   60   70   80   90   100%
> |----|----|----|----|----|----|----|----|----|----|
> ***************************************************
> Freeing dinodes [DONE]
> Scan done...
>
> Total number of inodes stored:0
> Number of
>   Directories: 0
>   files: 0
>   symlinks: 0
>   special: 0
>   unallocated: 0
> Total number of inodes stored:0
> Number of
>   Directories: 0
>   files: 0
>   symlinks: 0
>   special: 0
>   unallocated: 0
>
>
> Searching for directory parents
>
> 0%   10   20   30   40   50   60   70   80   90   100%
> |----|----|----|----|----|----|----|----|----|----|
>
>
> Searching for file parents and names
>
> 0%   10   20   30   40   50   60   70   80   90   100%
> |----|----|----|----|----|----|----|----|----|----|
>
> Searching for roots
> Getting unique roots
>
>
> Creating directory structure
>
> 0%   10   20   30   40   50   60   70   80   90   100%
> |----|----|----|----|----|----|----|----|----|----|
> Done!
>
>
>
>
>