On Sun, Apr 18, 2010 at 3:19 PM, pk <pete...@coolmail.se> wrote: > On 2010-04-18 19:43, Mark Knecht wrote: > >>> suspicion is that Linux is doing something that wakes the drive up >>> once every two minutes and then lets the drive go back to sleep. That > > Sounds a bit like: > http://lwn.net/Articles/257426/ > > Although it may be different in your case... > > Best regards > > Peter K
Yeah, does sound very similar. A few others have mentioned this in the past but I've not yet discovered what Gentoo or specifically my kernel config might have done to set it off. gandalf linux # date && smartctl -A /dev/sda | grep Load_Cycle_Count Sun Apr 18 16:08:16 PDT 2010 193 Load_Cycle_Count 0x0032 187 187 000 Old_age Always - 41929 gandalf linux # I'd experiment with the hdparm command but it doesn't work. Maybe there's somethign else I need to do first or something: gandalf linux # hdparm -B 254 /dev/sda /dev/sda: setting Advanced Power Management level to 0xfe (254) HDIO_DRIVE_CMD failed: Input/output error HDIO_DRIVE_CMD(identify) failed: Input/output error gandalf linux # hdparm does work though: gandalf linux # hdparm -tT /dev/sda /dev/sda: Timing cached reads: 11552 MB in 2.00 seconds = 5779.10 MB/sec Timing buffered disk reads: 314 MB in 3.00 seconds = 104.50 MB/sec gandalf linux # Thanks, Mark
