Warning--bdflush Not Running Modern kernels use a better strategy for writing cached disk blocks.
In addition to the kernel changes, this involves replacing the old
update program which used to write everything every 30 seconds with a
more subtle daemon (actually a pair), known as bdflush. Get
bdflush-n.n.tar.gz from the same place as the kernel source code ("How
To Upgrade/Recompile a Kernel.") and compile and install it. bdflush
should be started before the usual boot-time file system checks. It
will work fine with older kernels as well, so there's no need to keep
the old update around.