Date: Mon, 29 Sep 2008 17:02:33 +0900
From: Tejun Heo <tj@xxxxxxxxxx>
Hello,
I'm writing to everyone who reported to me or linux-ide about frequent
head unload problem and the report is not yet committed to
storage-fixup.conf.
I'm a bit worried about the explosion of reports because I really
wanna avoid creating false entries as they will increase power
consumption on Linux unnecessarily. I've just updated the Known
Issues wiki page. Here are the update parts.
Note that modern laptop drives are supposed to unload frequently to
save power. Unless the unloading is excessive, disabling powersaving
is not a good idea. It seems that most modern drives are rated for
600,000 load/unload cycles which translates to about two years of
uptime at 35 unloads per hour. Even when assuming continuous 12 hours
of usage everyday, this means the drive will only reach its rated
load/unload cycle limit after four years and shouldn't be considered
malfunctioning. Please only report cases where the expected uptime is
significantly lower than two years.
... Also, please include how many times the drive unloads the head
per-hour under nominal usage without any adjustment.
Machines currently on the storage.fixup list are (or at least supposed
to be) the extreme cases where the drive unloads its head multiple
times per minute decreasing its life expectancy to under a year.
Please double check your machine falls into this category.
Mine was unloading multiple times per minute. It had accumulated
70,000 cycles within the first month or two of use.
--
Robert Krawitz <rlk@xxxxxxxxxxxx>
Tall Clubs International -- http://www.tall.org/ or 1-888-IM-TALL-2
Member of the League for Programming Freedom -- mail lpf@xxxxxxxxxxxx
Project lead for Gutenprint -- http://gimp-print.sourceforge.net
"Linux doesn't dictate how I work, I dictate how Linux works."
--Eric Crampton
--
To unsubscribe from this list: send the line "unsubscribe linux-ide" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
