I've upgraded my main FreeBSD box to 4.3-RC and have found a curious result.
It's not crashing, or corrupting anything, or running slow, but it *sounds*
really annoying.

When I use "cvs update" to refresh my -current, -stable, and ports trees,
disk activity clearly pulses once every second.  Previously (with 4.2-R)
this was not the case (or perhaps it was very faintly underneath the
other disk activity).

I'm finding this "pulsing" quite irritating, and am willing to sacrifice
a lot of disk speed to be rid of it.  Which sysctl options, if any, can
I use to prevent synchronised once per second pulses of disk activity?

Possibly useful hardware hints: K6-2/300, MVP3 chipset, 96MB ram, ncr875 scsi,
multiple IBM UW disks (one has the CVSROOT and another the checked out
source trees).  I update the source trees one at a time.

Stephen.

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