Re: [Yaffs] Mounting time

Hi All,

Our nand flash driver is really low, so it takes 4 minutes to mount after
not clear umount.
mini-UPS is impossible, my system is a handheld product. :)
Is it possible that don't call yaffs_ScanBackwards after not clear umount?
It really kills time.

Can I use this solution to reduce the mounting time (after normal umount or
not clear umount):
1) assume the size of yaffs2 partition is 3G, it's called mypartition.
2) create a file which is called myfile and its size is 2.9G into
mypartition
3) after mount mypartition, then mount myfile as vfat filesystem.
4) read and write files from/to vfat filesystem.

Any comment?

Alex

2008/7/29 Charles Manning <manningc2@actrix.gen.nz>

> On Tuesday 29 July 2008 10:11:47 James Kehl wrote:
> > > -----Original Message-----
> > > From: yaffs-bounces@lists.aleph1.co.uk [mailto:yaffs-
> > > bounces@lists.aleph1.co.uk] On Behalf Of Wookey
> > > Sent: Tuesday, 29 July 2008 2:16 AM
> > > To: alex z
> > > Cc: celeber2@gmail.com; yaffs@lists.aleph1.co.uk
> > > Subject: Re: [Yaffs] Mounting time
> > >
> > > well, yes, that's what happens. Can you split your partitions into
> > > smaller chunks, make (some of) them read-only? Battery backup allowing
> > > proper shutdown?
> >
> > Does anyone have any figures on how long it takes to create a
> > checkpoint? Does it depend on partition size, or activity?
>
> It depends on partition size and the number of files.
>
> >
> > If the recommended solution is - effectively - a mini-UPS and a
> > power-fail interrupt, then I'd like some vague idea how large the 'UPS'
> > will need to be :)
>
> The time is easy to measure: just do a umount.
>
> It should take only approx the same amount of time as a checkpointed mount
> (ie
> 3 sec or so in this case).
>
> >
> > James
> >
> >
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>
>
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