Potential hardware issue with too often HDD heads parking

[Vladimir Grebenschikov]

Hi

Probably does not related to FreeBSD, but anybody may confirm that
FreeBSD laptops are not affected ?

https://launchpad.net/bug59695.html

> When switching to battery power, /etc/acpi/power.sh issues the command
> hdparm -B 1 to all block devices. This leads to extremely frequent
> load cycles. For example, my new thinkpad has already done well over
> 7000 load cycles -- in only 100 hours. That's at least one unloading
> per minute. Googling for "load unload cycles notebook OR laptop" shows
> that most laptop drives handle up to 600,000 such cycles. As these
> values clearly show, this issue is of high importance and should be
> fixed sooner rather than later.
> 
> Please see for yourself how often your drive is load cycling:
> smartctl -d ata -a /dev/sda
> (This command is for an SATA drive; you'll need to install the
> smartmontools package first.)
> 
> See also http://paul.luon.net/journal/hacking/BrokenHDDs.html for a
> rather dramatic account of the effects the current default values may
> have.
> 
> Just in case the load/unload timeout depends on the specific laptop or
> disk model, here are my system specifications:
> ThinkPad Z60m & Hitachi HTS541080G9SA00 disk (80GB)


-- 
Vladimir B. Grebenschikov
SWsoft Inc. vova at swsoft.com