UBIFS size issue

Hi,

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When I am giving 55MiB of vol size, by following command

ubimkvol /dev/ubi0 -N vol -s 55MiB

I could able to see only, 49 MiB of space when Kernel boot-up.

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Can't you get the answer from here ?

http://www.linux-mtd.infradead.org/faq/ubifs.html#l_df_report

Kazu

Hello,

Thanks for reply,

I went through the links, it has mentioned about the free space i.e. "Use%" from below logs .

It also informs that how it varies. Following logs of mine is showing the same.

But I actually want to know that ,

when I create a volume by 55 MiB size and I get it as 49 MiB size after df -h, then

for what purpose 6 MiB (55MiB - 49MiB) is used ?

Why I could not able to see 55 MiB size, as allocated total space. ?

-- Following is the log -----

root@dhcppc7:~# df -h

Filesystem Size Used Available Use% Mounted on

ubi0:vol_1 49.2M 44.0M 5.2M 90% /

root@dhcppc7:~# sync

root@dhcppc7:~# df -h

Filesystem Size Used Available Use% Mounted on

ubi0:vol_1 49.2M 43.0M 6.2M 87% /

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Thank you,

Ashwin Rase.

Hi,

--- Quote Start ---

But I actually want to know that ,

when I create a volume by 55 MiB size and I get it as 49 MiB size after df -h, then

for what purpose 6 MiB (55MiB - 49MiB) is used ?

Why I could not able to see 55 MiB size, as allocated total space. ?

--- Quote End ---

UBIFS always reports conservative amount of free space,

I think that the reason is written here.

http://www.linux-mtd.infradead.org/doc/ubifs.html#l_spaceacc

Kazu