Formating Reiserfs 3.6 with bad-blocks

Formating Reiserfs 3.6 with bad-blocks

[Bhikkhu Mettavihari]

Greetings,

I have about 50 x 500GB to 2 TB hard disks in my setup.
All them are using reiserfs 3.6

When I get slow reads on a hard disk then I do:
# badblocks -b 4096 -o bad-blocks-finished-6-2.txt /dev/sdd1

# tail -f bad-blocks-finished-6-2.txt
77299721
77299722

after that I format the hard disk with this command:

mkfs.reiserfs -B /root/bad-blocks-finished-6-2.txt /dev/sdd1

But my hard disk still seems to have problems with reading certain parts.
I notice that the reading speed is going down to a very low level with
some files.

Is my method correct ?
or have I done something incorrect ?

with metta
Mettavihari

Re: Formating Reiserfs 3.6 with bad-blocks

[Jeff Mahoney]

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On 7/26/14, 4:16 AM, Bhikkhu Mettavihari wrote:
> Greetings,
> 
> I have about 50 x 500GB to 2 TB hard disks in my setup. All them
> are using reiserfs 3.6
> 
> When I get slow reads on a hard disk then I do: # badblocks -b 4096
> -o bad-blocks-finished-6-2.txt /dev/sdd1
> 
> # tail -f bad-blocks-finished-6-2.txt 77299721 77299722
> 
> after that I format the hard disk with this command:
> 
> mkfs.reiserfs -B /root/bad-blocks-finished-6-2.txt /dev/sdd1
> 
> But my hard disk still seems to have problems with reading certain
> parts. I notice that the reading speed is going down to a very low
> level with some files.
> 
> Is my method correct ? or have I done something incorrect ?

I hate to be the bearer of bad news, but whatever disk is reporting
the bad blocks probably needs to be replaced. Modern disks have the
ability to remap sectors automatically. If you are getting bad sectors
during writes, it means that the remapping table has been exhausted.
If you're getting bad sectors during reads, your best bet is to try to
copy those blocks elsewhere and hope for the best.

- -Jeff

- -- 
Jeff Mahoney
SUSE Labs
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