hdparm -B for netbooks

Richard Zidlicky rz at linux-m68k.org
Thu Feb 25 12:26:13 UTC 2010

On Thu, Feb 25, 2010 at 09:37:49AM +0100, Till Maas wrote:
> Another possible explanation might be that the access pattern of the OS
> is different, e.g. maybe the drive is not idle long enough to unload.
> But since there is afaik no proper documentation about this issue,
> everything is just guessing.

access pattern was the problem in many cases. In theory it is possible to 
adjust how long data should be cached before written to disk, is there any 
central place in Fedora to do it? I do recall the UI from somewhere but not 
sure which distro and version. 
Once I tried that it did not appear to make a significant difference, but
I did not try all the other possible tweaks like manual syslog configuration.

Even if writebacks were delayed by 5 minutes it would still be 170,000 head
parking cycles per year in the worst case so I think this solution would be
interesting only in very few cases.

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