immense delayed write to file system (ZFS and UFS2), performance issues

Bruce Cran bruce at
Tue Jan 26 19:17:53 UTC 2010

On Tue, 26 Jan 2010 20:45:10 +0200
Dan Naumov <dan.naumov at> wrote:

> The disks are of exact same model and look to be same firmware. Should
> I be worried that the newer disk has, in 136 hours reached a higher
> Load Cycle count twice as big as on the disk thats 5253 hours old?

There's a similar problem with laptop HDDs and APM settings that cause
a high load_cycle_count too. According to and
many blog entries, parking the heads frequently can shorten the HDD

Bruce Cran

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