* Re:Power Down
@ 1999-12-07 21:19 Bob Canup
0 siblings, 0 replies; only message in thread
From: Bob Canup @ 1999-12-07 21:19 UTC (permalink / raw)
To: MTD
Watch dogs are generally there to catch the problem of a run-away
machine - this ought to be a very rare occurrence.
According to Vipin's statistics about 1 in 250 random power failures
during writes to a DOC2000 results in a bad sector on the device. Since
you are required to run the chip in RW mode the only way I see to avoid
the problem is a UPS on the front end - with signaling to indicate power
failure so that an ordered shutdown could occur.
As far as the problem of a bad sector which he discussed I have not seen
any solutions other than the erase and start over one he originally came
up with - which for the reasons he discussed - is unacceptable.
The first step toward solving a problem is understanding exactly what
the problem is. My theory is that if you interrupt a sector write while
it is in progress the data and the error checking code don't match -
thus you get a bad sector. Any other theories?
To unsubscribe, send "unsubscribe mtd" to majordomo@infradead.org
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~1999-12-07 21:18 UTC | newest]
Thread overview: (only message) (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
1999-12-07 21:19 Re:Power Down Bob Canup
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox