Re: [PLUG] Using resize2fs

["Eric H. Johnson" <ejohnson@camalytics.com>]

Rich,

Thanks, that is basically what I thought. It does not have LVM. I am trying to get Debian / Ubuntu running on an Olinuxino (sort of like a RPi).  The first step was to just get a stock OS running. It isn't all that important to expand to the size of the SD since I will need to build my own kernel / distro anyway. It just sounded like it should be easy.

Thanks,
Eric


Sent from my ASUS Pad

Rich Freeman <r-plug@thefreemanclan.net> wrote:

>On Thu, Jan 31, 2013 at 8:15 PM, Eric H. Johnson
><ejohnson@camalytics.com> wrote:
>> I have tried this both when mounted to another Linux computer and after booting to the SD. In both cases it basically says "nothing to do".  If I give it a size of 15G it says only so many blocks are available and I asked for a whole lot more.
>>
>> How do I expand the 3.9GB partition to use the remainder of the SD without losing data?
>
>Might not hurt to give actual commands and responses, as it is easy to
>miscommunicate.  Include:
>fdisk -l
>df -h (with the partition mounted)
>
>That said, your first issue is that your filesystem can't be bigger
>than the partition it is on, and that is only 4GB.  So, you first need
>to edit the partition table to extend the partition to fill the
>remaining space.  Something like qtparted can probably do the job - or
>you can just delete and re-create the partition but if you do this you
>MUST make sure the starting position is the same.  Oh, and don't do
>this part with the filesystem mounted (unless you're using LVM).
>
>Once the partition is resized then just run resize2fs <device> and it
>will be resized to the full size of the partition.  This part can run
>while mounted, but I'd avoid that if you can just the same.
>
>With LVM all this stuff is a breeze - you can grow, shrink, as much as
>you want with everything online.
>
>Oh, be aware that ext2/3/4 have a fixed number of inodes at filesystem
>creation - so unless it was created with an unusually large number of
>inodes you can't resize more than a few orders of magnitude before you
>run out of them.  If you're storing digital video or something that
>isn't a big deal, but if you're storing lots of small files it
>definitely is one (in fact, on small filesystems even the defaults can
>be pretty sparse on inodes).  That is one of the benefits of btrfs -
>everything is dynamic.
>
>Rich
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