[Bug 59695] Re: High frequency of load/unload cycles on some hard disks may shorten lifetime

Paganini nebanks at gmail.com
Thu Dec 25 03:47:02 UTC 2008


I have a Thinkpad X40 with a Hitachi hard disk. It is a C4Kxx series
disk, which is not supported by Hitachi's "Feature Tool," so I'm unable
to change the default APM settings in the disk's firmware.

I've been following this bug and its related threads closely and
implemented the most recent fixes. The fixes *do* work, in the sense
that I can query the drive using 'hdparm -I' and it reports that power
management has been disabled, or set to 254 or 1 or whatever value the
scripts mandate.

And yet, the drive just sits there clicking away 1 to 3 times a minute,
and the load cycle count keeps going up. I just now (in the last 5
minutes) listened to it click 3 times, got a terminal and ran 'hdparm
-I' which says "Advanced power management level: disabled" and listened
to it resume clicking, just like clockwork. It really has me stumped.

-- 
High frequency of load/unload cycles on some hard disks may shorten lifetime
https://bugs.launchpad.net/bugs/59695
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