Re: Cant read superblocks

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On Wed, Apr 20, 2016 at 2:25 PM, Chris Murphy <lists@xxxxxxxxxxxxxxxxx> wrote:
> On Wed, Apr 20, 2016 at 2:07 PM, Chris Murphy <lists@xxxxxxxxxxxxxxxxx> wrote:
>> On Wed, Apr 20, 2016 at 1:29 PM, Chris Murphy <lists@xxxxxxxxxxxxxxxxx> wrote:
>>> On Wed, Apr 20, 2016 at 1:09 PM, Weiner, Michael <weinerm@xxxxxxx> wrote:
>>
>>>>
>>>> But then the eftools complain and don’t work properly, example
>>>>
>>>> [root@raos_apps01 ~]# mke2fs -n /dev/sdb1
>>>> mke2fs 1.39 (29-May-2006)
>>>
>>> There's the problem. Why are you using such an ancient mkfs? That
>>> version doesn't support big file systems. When I use this same command
>>> on Fedora 23 which has 1.42.13, it works fine for ext2, ext3 and ext4
>>> on a virtual size 15TB file system and uses 4K block size.
>>
>> https://lwn.net/Articles/177820/
>>
>> I'm not sure which version of e2fsprogs got this patch, but it seems
>> pretty certain your file system was not created with mke2fs 1.39.
>
> This might be wrong. Try -n -F with this old version and see if it works.
>
> I don't know the consequences of forcing it, but you have what you
> have, so you could try it if you're convinced you were using such an
> old e2fsprogs.

Related. -j isn't the same as mkfs.ext3 I guess, at least not with
such old progs.
tl;dr, best to use mkfs.ext3, mkfs.ext4, etc

https://bugzilla.redhat.com/show_bug.cgi?id=594777





-- 
Chris Murphy
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