topic Re: Filesystem usage ? in i.MX Processors

Filesystem usage ?

karstenklein — Fri, 07 Jun 2013 12:33:20 GMT

Hi,

i´m currently working with the SABRE board SDB from Freescale.

1) I prepared a SD-Card with 2GB for booting the Linux which comes as image, together with the MFG - Tool (kernel image, uBoot, and rootFS)

2) I prepared the internal eMMC which has a size of 8GB, with exactly the same images as used for the SD-Card

From my point of few, both, the SD Card and the eMMC are fomated in the same way (ext3).

For the eMMC 'df' gives me the following:

root@freescale /$ df -h

Filesystem Size Used Available Use% Mounted on

/dev/root 7.3G 167.8M 6.7G 2% /

tmpfs 438.0M 68.0K 437.9M 0% /dev

shm 438.0M 0 438.0M 0% /dev/shm

rwfs 512.0K 512.0K 0 100% /mnt/rwfs

rwfs 512.0K 512.0K 0 100% /tmp

rwfs 512.0K 512.0K 0 100% /var

For the SD-Card 'df' gives me the following:

Filesystem	Size	Used Available Use% Mounted on
/dev/root	1.8G	57.8M	1.7G 3% /
tmpfs	438.0M	76.0K	437.9M 0% /dev
shm	438.0M	0	438.0M 0% /dev/shm
rwfs	512.0K	512.0K	0 100% /mnt/rwfs
rwfs	512.0K	512.0K	0 100% /tmp
rwfs	512.0K	512.0K	0 100% /var

So, why are the used spaces different and why so big?

I expected the size of the rootFS should be something about 20MB.

I´m sure I am missing some fundamental items.

May be someone can shed up some light on my darkness.

Best regards

Karsten.

Re: Filesystem usage ?

LeonardoSandova — Fri, 07 Jun 2013 16:30:55 GMT

For the eMMC partition sizes, check the script which does partition, it is under the Profile folder, on the MFG - Tool.

Leo

Re: Filesystem usage ?

karstenklein — Sun, 09 Jun 2013 08:48:27 GMT

HI Leo,

thx for the quick reply.

As far as I can see, both use the same script for partitioning.

Its only the device parameter which is different:

_________________________________________________________

sh mksdcard.sh /dev/mmcblk0

......

_________________________________________________________

sh mksdcard.sh /dev/mmcblk1

Best regards

Karsten

Re: Filesystem usage ?

karina_valencia — Fri, 23 Aug 2013 15:40:17 GMT

EricNelson are you available to help on this case?

Re: Filesystem usage ?

EricNelson — Sat, 24 Aug 2013 16:06:16 GMT

I'm not very familiar with the MFG tool, but it sounds as if the block size chosen when creating the eMMC partition was different from the SD card partition.

Karsten, can you run "du -hs" on each to see if the content size is significantly different?

You might also read through the mksdcard.sh script to see if it's passing different options to mkfs.ext3.

It would be odd if that were the case, because the default 1k block size can support filesystems up to 2 TiB.