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SubjectRe: How errorproof is ext2 fs?
I hope this will help a bit...

On Thu, 13 Sep 2001, Otto Wyss wrote:

> While reading the thread about "HFS Plus on Linux?" at
> "debian-powerpc@list.debian.org" I had the following experience:
>
> Within an hour I had to hard reset both of my computers, first my Linux-i386 due
> to a complete lockup of the system while using el3diag, second my MacOS-powermac
> due to an not responding USB-keyboard/-mouse (what a nice coincident). Now while
> the Mac restarted without any fuse I had to fix the ext2-fs manually for about
> 15 min. Luckily it seems I haven't lost anything on both system.
>
> This leaves me a bad taste of Linux in my mouth. Does ext2 fs really behave so
> worse in case of a crash? Okay Linux does not crash that often as MacOS does, so
> it does not need a good error proof fs. Still can't ext2 be made a little more
> error proof?

If you mount you ext2 filesytem with synchronous i/o rather than async
they'll be signficantly less brittle at the expense of some speed. I do
this occasionaly when testing new hardware or radical changes
something like:

mount -o remount sync /fsname

> Okay, there are other fs for Linux which cope better with such a
> situation, but are they really more errorproof or are they just better
> in fixing up the mess afterwards?

both actually if your're refering to reiserfs/ext3/jfs

> Could there be more attention in not
> creating errors instead of fixing them afterwards?

The errors are the result of omitted data not incorrect data... the files
were open the data that was gonna be written was sitting in the buffer, it
just hadn't been comitted yet...

> O. Wyss
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