df, lvm and 6TB arrays oh my!

[Mark Haney]

Mark Haney wrote:
>>>  
>>
>> Well, now we're in the not so good news....
>>
>> Just doing the math....
>>
>> (Block count * Block size) / 1024^4
>> (632648704 * 4096) / 1024^4 = 2.35 TB
>>
>> So, what you are seeing in df is accurate as far as the filesystem is
>> concerned....
>>
>> So, my thoughts are that perhaps someone originally created the logical
>> volumes at 2.4TB, created the filesystems, and then tried to extend the
>> logical volumes with lvextend?  Of course, while lvextend will grow the
>> underlying logical volume it does not grow the filesystem.  That is done
>> with the ext2online command, if the filesystem is mounted, and with
>> resize2fs if the filesystem is unmounted.
>>
>> Can you check to see which of those two utilities you have available in
>> FC2?  Whether you have both resize2fs and ext2online?  Of course,
>> resizing the filesystem is potentially dangerous and presumes good
>> quality backups, and read, lots of disclaimers at this point about
>> eating your data for lunch......
>>
>> --Rob
>>
>>
>>   
> I created the volumes myself, all at once.  I verified the size of the 
> volume at each step. I had thought that it's possible that ext3 only 
> formatted the 2.4TB extent and that resizing it might work.  
> Fortunately I have one of these volumes not in use so I can test that 
> and see how it goes.  Thanks for all your help on this.
>
>
Just an update on this.  It seems as if the mke2fs version that comes 
with FC2 when used with a large lvm volume will only create the fs up to 
2TB.  When I used resize2fs on the volume the system extended the fs to 
the full extent of the volume.  Thanks Robert, for all your help on 
this.  I certainly do appreciate it.


-- 
Interdum feror cupidine partium magnarum Europae vincendarum

Mark Haney
Sr. Systems Administrator
ERC Broadband
(828) 350-2415