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List:       ext3-users
Subject:    RE: Compact Flash, EXT3, and IDE - a bad idea?
From:       "Kieft, Brian" <bkieft () mbari ! org>
Date:       2007-04-24 17:29:56
Message-ID: F82344282A084F4C98F7235E896FEA5ABF6A87 () chill ! shore ! mbari ! org
[Download RAW message or body]

Good points. Thanks for the advice. I'll give badblocks a try (currently it's not a \
part of my build so I'll run it from a different machine with a card reader). 

In terms of power loss and corrupt sectors, both of the systems that I'm having \
issues with do experience occasional and sudden power interruptions. 


Results from running dd showed multiple inode errors. Then the system crashed. On the \
subsequent boot, e2fsck attempted to repair the card and couldn't. It could only be \
mounted as EXT2 after that! Attempting to run tunefs gives: 

sbin/tune2fs: Bad magic number in super-block while trying to open /dev/hda1
Couldn't find valid filesystem superblock.



Also, the partition info is here:
major minor  #blocks  name

   3     0    8064000 hda
   3     1    8063968 hda1




-----Original Message-----
From: Cam [mailto:camilo@mesias.co.uk] 
Sent: Tuesday, April 24, 2007 1:52 AM
To: Stephen Samuel
Cc: Kieft, Brian; ext3-users@redhat.com
Subject: Re: Compact Flash, EXT3, and IDE - a bad idea?

Stephen / Brian

I use badblocks to check for unreadable sectors. I find that CF can gain 
corrupt sectors when power is lost suddenly. These can almost always be 
fixed by re-writing them. I use badblocks -w to do the re-writing.

Your message seems to imply a problem writing, badblocks -w would write 
several patterns to the device so would be a good 'stress test'

-Cam

-- 
camilo@mesias.co.uk                                                 <--

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