Flash Partitons

Flash Partitons

[Ashok M Padmanaban]

Hi
 It will be very usefull if some one can give their  comments.

We are developing an embeded device (email device ) and planning to have

CRAMFS for the root file system and JFFS2 for the user data.

If CRAMFS is root fs, then i cant have  system and user configuration
files under this as they are updated according to requirement.

One way is to have links to Jffs2 partition so that we  can update these
files.
Or To have a separate partition (jffs2) for configuration files, which
consumes a lot of
flash space (as 5 sectors are reserved for GC).

I feel first one is the better choice as we are very tight on FLASH
space.
But having the config files and user data in the same partition
.......will it be safe?
Like while manipulating the user data, is there any chance that config
files may be corrupted...while GC. is running and the power goes
down.......)

Is there any other way of doing this.

Thanks in advance
Regards
ashok

Re: Flash Partitons

[David Woodhouse]

ashokmp@sasken.com said:
>  But having the config files and user data in the same partition
> .......will it be safe? Like while manipulating the user data, is
> there any chance that config files may be corrupted...while GC. is
> running and the power goes down.......) 

It ought to be safe. It's designed that way and perhaps more importantly,
we've actually done power-fail testing on active JFFS2 filesystems and
observed that it's fine. You can do your own testing to make sure it's
reliable to your own standards.

The 5 blocks of GC reserved space is also fixable. We'll reduce it if and
when I'm sufficiently convinced that it's safe to do so.

--
dwmw2

is flash file system stable in linux 2.4.1 kernel

[somshekar kadam]

 i am getting problem of freeing accounting screwed 
when i am going for big files
i am able save and restore back a small file any idea
please help
som

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