Re: hdparm

[Brian Servis <servis@purdue.edu>]

*- On 10 May, Michael Beattie wrote about "Re: hdparm"
> On Sun, 9 May 1999, Johan Pettersson wrote:
> 
>> Hi!
>> 
>> try to put my hd in standby/sleep, but it dose not 
>> work so well. When I type hdparm -y/Y /dev/hda I can
>> hear my hd spindown for 2-5 sec and then it goes back
>> to normal mode! Does anyone know why it does not stay 
>> in standby/sleep mode ? (have a IBM Deskstar 10,1 7200Rpm)
> 
> It will be a process requiring the use of the filesystem, and as soon as
> it requests it, it will spin the hard drive back up. I had the same
> problem... It was syslogd putting --MARK-- into the logfile. your MTA is
> another culprit, doing the mail queue every 20 minutes.
> 

Or the update daemon, from the man page:

      The update daemon flushes the filesystem buffers at a reg­
       ular interval. It has two modes of operation.  By  default
       it  will  wake  up  every  5  seconds and flush some dirty
       buffers. If this is not possible,  it  will  automatically
       fall  back  to the traditional behavior of waking up every
       30 seconds to call sync(2).

-- 
Brian 
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Mechanical Engineering                              servis@purdue.edu
Purdue University                   http://www.ecn.purdue.edu/~servis
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