Kevin Kofler wrote:
Michael Cronenworth wrote:
Why would Linux be waking up every 5 to 10 seconds to write to the disk
when I am sitting at my desktop or sitting at the login screen? (i.e. No
programs running. Only 40 total wakeups seen in powertop)
- Seagate 320gig SATA
- XFS filesystem, relatime mount option enabled
- link_power_management_policy set to min_power
- vm.dirty_writeback_centisecs is set to 1500
I even unmounted /boot (default ext3) but that did not change anything.
Every 5 to 10 seconds I see the HDD light flash and sometimes I hear a
very faint "beeping" like the drive is waking up or powering off,
whichever it is doing.
Try tweaking your hdparm settings.
Adding this to your rc.local might help:
/sbin/hdparm -S 255 /dev/sda
/sbin/hdparm -B 255 /dev/sda
I think the O.P. was trying not to spin up the drive so often, not keep it
running to pull the battery down... setting the filesystem flush and
/proc/sys/vm/dirty* values to be reluctant to write will halp here, and allow
powersave (-B) with a low value is more likely to be what is wanted.
NOTE: setting the flush time to a high value leaves data in memory and not on
the drive, use of a manual "sync" command is desirable if you modify critical data!
--
Bill Davidsen <davidsen@xxxxxxx>
"We have more to fear from the bungling of the incompetent than from
the machinations of the wicked." - from Slashdot
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