On Mon, 2011-01-10 at 12:40 -0500, solarflow99 wrote: > On Mon, Jan 10, 2011 at 12:01 PM, MJang <[email protected]> wrote: > > On Thu, 2011-01-06 at 08:58 +0100, Jan-Frode Myklebust wrote: > >> On Wed, Jan 05, 2011 at 08:51:17AM -0800, MJang wrote: > >> > > >> > Just noticed that since I installed RHEL 6 back in Nov, my laptop hard > >> > disk (from a new T410) has gone through about 200,000 cycles, as > >> > confirmed by the smartctl -a /dev/sda command. (If I remember right, > >> > hard drives expire at around 600,000 cycles.) > >> > >> Just for datapoint.. my T400, installed with RHEL6 october 31. (was > >> running fedora-13 before that, and RHEL5 before that), has only gone > >> trough 290 power cycles: > >> > >> 9 Power_On_Hours 0x0032 097 097 000 Old_age > >> Always - 12661 > >> > >> 12 Power_Cycle_Count 0x0032 099 099 000 Old_age > >> Always - 290 > >> > >> I have disabled the "spin down hard disk" option in the power > >> management preferences (it's an SSD, so there's nothing spinning > >> anyway). > > > > Appreciate the datapoint. FWIW, I've reported this as a bug at > > https://bugzilla.redhat.com/show_bug.cgi?id=667485 > > > > I gather opinions vary on whether one of the following commands is the > > better way to prevent the premature aging problem: > > > > hdparm -B 254 /dev/sda > > hdparm -B 200 /dev/sda > > > > I've since had to replace the hard drive, as it was spouting out lots of > > read error messages -- the damage was focused on the top-level root > > directory partition where RHEL 6 was installed. (the other partitions on > > my drive were fine) > > Does the new drive show high cycles also?
Nope -- it's run about 200 cycles in the past 3 days, maybe 3 cycles/hr, which is acceptable on a laptop. (The related Ubuntu bug had a design solution goal of 15 cycles/hr.) One thing I forgot to add here is that it's the Load_Cycle_Count (item 193 in the output to smartctl -a /dev/sda) (25k cycles/yr is OK, AFAIK.) I currently have the following command in my /etc/rc.local /sbin/hdparm -B 200 /dev/sda at least until I figure out or remember where hdparm settings are normally configured. Thanks, Mike _______________________________________________ rhelv6-list mailing list [email protected] https://www.redhat.com/mailman/listinfo/rhelv6-list
