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Re: [ts-7000] Re: data logging without flash fatigue

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Subject: Re: [ts-7000] Re: data logging without flash fatigue
From: Jim Jackson <>
Date: Fri, 4 Apr 2008 11:29:47 +0100 (BST)
>
> Just want to check I have not overlooked something and go happily
> blasting my Flash with my data logging.
>
> I have htdocs on yaffs containing static files , I mount two subdirs,
> data and data_images, mounted tmpfs where I will be writing once or
> twice a minute. These are mounted with bind to ramdisk1/2
>
> $ mount
> /dev/root on / type yaffs2 (rw)
> none on /dev type devfs (rw)
> proc on /proc type proc (rw)
> none on /mnt/ramdisk1 type ramfs (rw)
> none on /mnt/ramdisk2 type ramfs (rw)
> none on /www/apache/htdocs/data type ramfs (rw)
> none on /www/apache/htdocs/data_images type ramfs (rw)
>
> My main uncertainly was whether the parent htdocs would register a
> change each time there's a write to htdocs/data
>
> Any wise councel?

Dunno about wise, but maybe it might update the access time, so make sure 
you have your root mounted noatime, I do

  mount -o remount,noatime /

pretty early on in my /etc/rc.d/rcS.sysinit . Mount will show the change

/dev/root on / type ext2 (rw,noatime)

The atime stuff is pretty easy to test using ls -lu to make sure it hasn't 
been updated.

However I _think_ stuff isn't touched.


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