Re: Potential hardware issue with too often HDD heads parking
Tom Donnelly <[email protected]>
| Newsgroups | gmane.os.freebsd.devel.mobile |
|---|---|
| Message-ID | <[email protected]> |
> 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) >> > > > _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-mobile To unsubscribe, send any mail to "[email protected]"