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Old 11-01-2008, 12:53 AM   #1
Registered: Sep 2007
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fsck for embedded linux system

My project contains a PC104 (Pentium M) connected to an IDE disk and runs Open SUSE. The disk is formatted with ext2
The PC104 is shutdown or reset by hardware. The user can not run a shutdown command (when deployed, the PC104 is not connected to a keyboard).
Sometimes, after power up, we have to run fsck to repair damages to the file system.
Can we format the disk in such a way that we will not need fsck at all ?
Will JFFS2 do the job ?
Old 11-01-2008, 01:18 AM   #2
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JFFS2 is for FLASH devices only (and best on flash devices which do not have their own wear-levelling). If you have an IDE HD, don't use a filesystem like JFFS2.

It is recommended that you run fsck if you have a HD; how else can you check for disk wear and corrupted blocks? It would be great if someone has created a program which can do the checks in the background (consuming very little CPU time) and more or less continuously, and of course better still if checks can be done while the disk is mounted. It's a pretty big challenge, but maybe google will turn up something useful.
Old 11-02-2008, 04:37 AM   #3
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Well, you could run fsck automatically, so that you don't need user intervention. this may not be a good solution for you as it will make every boot slow, possibly slower than you can stand.

You could use a journalled file system, which doesn't rely on the same kind of process that ext2 does. Practically, this transforms rather than eliminates the maintenance problem, so this may not be the solution for you (but may make the problem less bad).

Is the base problem that you are having non-clean shutdowns?
Old 11-03-2008, 11:16 AM   #4
Registered: Sep 2007
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What is the optimal file system for IDE flash ?

If I use ext2 or ext3 and mark the partition as read only,
will this solve the problem ?

I want to avoid the need for fsck after some time.



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