Date: Wed, 31 Oct 2007 17:14:59 +0300 From: Vladimir Grebenschikov <vova@sw.ru> To: freebsd-mobile <freebsd-mobile@freebsd.org> Subject: Potential hardware issue with too often HDD heads parking Message-ID: <1193840099.95027.16.camel@localhost>
next in thread | raw e-mail | index | archive | help
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@swsoft.com
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?1193840099.95027.16.camel>