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Re: [PATCH] Block Devices support for JFFS2



 >  From experience, I can state that these "IDE"
flash
> devices (I have tested 2 different manufactures of
CF and
> 3 different models of 1 major IDE flash disk 
> manufacturer) are NOT reliable under power fail
> conditions- if the system is writing to them.

I totally agree with you, same experience here.
Indeed, my
firewall's CompactFlash is a 16 MB I had to partition
after
hardware errors due to poor power supply. The power
wire
has been cut, and the only power that reached the
device
was drawn through the IDE signals (which was enough
for reads, but unfortunately not for writes). And
after that,
the device returns "CRC error", "sector not found",
and such
standard hard disks errors which are absolutely 
unrecoverable (even after attempting to reformat it).

> If one is really interested in building a reliable
system,
> that you are going to ship in quantity, I would
strongly
> encourage power fail testing on these devices.

in fact, it would be good if the IDE "low level
format" 
command was completely implemented so that it sets the
device back in factory configuration.

Willy


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