odd problem with large ext4 file system

[adler-wRvlPVLobi1/31tCrMuHxg at public.gmane.org (Stephen Adler)]

I only do fsck's on unmounted file systems. My periodic forced file 
system checks are a manual process where I have to reboot the system in 
a special configuration so that processes which use the disk are start 
started and I can safely unmount the volume. The volume is actually a 
raid 5 array of seven 1 terabyte sized disks.

I've done a little reading on ext4 file system and it seems that ext4 
would be the way to go, but I'm getting a bit of the jitters with the 
errors I'm seeing on the file system. There are no hardware errors being 
reported to /var/log/messages thus making me think I'm tripping over an 
ext4 bug. anyone out there have experience with a 6 terabyte sized file 
system or more and ext4?

Cheers. Steve.

On 12/24/2009 02:39 PM, Jerry Feldman wrote:
> I hope that you are doing your fsck (assume fsck.ext4) on an unmounted
> file system. If you allow fsck to fix a mounted file system, you are
> asking for trouble. The ONLY time fsck should be run on a mounted file
> system is on root, and when it is mounted readonly.
>
> Basically, I think that the Fedora 12 version of ext4 has been well
> tested (read some prior Jarod Wilson posts).
>
> I also assume that you are using either LVM or RAID0 striping.
>
>
> On 12/24/2009 01:11 PM, Stephen Adler wrote:
>    
>> Hello all (and merry holidays!)
>>
>> I'm playing around with a 6 terabyte partition I put together which has
>> an ext4 file system mapped onto it. In order to make sure its working
>> well, I do periodic forced file system checks. I assume that if a file
>> system is working well, and the underlying hardware, I should be able to
>> run fsck -f as many times as I want and it should pass each time. Well,
>> with this particular file system, on the first fsck -f I performed on
>> it, a few errors were found which I fixed. I then re-ran fsck -f and it
>> went through with no errors. I then ran it again, and it found a bunch
>> of errors. I ran it again, and it found more errors. All the errors its
>> found I've fixed, but I'm getting a bit worried that ext4 is not ready
>> for prime time. I'm running fedora 12, with all its patches. I know ext4
>> made its debut in fedora 11.
>>
>> Should I bite the bullet and reformat the disk as ext3? Can ext3 handle
>> a 6 terabyte file system (I think it can...) Are the advantages of ext4
>> such that it makes sense to try and keep the file system at ext4?
>>
>>
>>      
>    
>
>
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