did gbde on swap destroy some boot sectors?
eugene3 at web.de
Thu Jul 29 17:36:38 PDT 2004
Scot Hetzel wrote:
>>my swap labels are the following ones...
> What we should be looking at are the disklabels for those devices:
> disklabel /dev/da0s1
> As the swap partition could be overlapping with your root partition.
> Then when your system crashed, the system wrote to the end of your
> swap partition, which wrote over your root partition.
i configured the labels some moths ago from within sysinstall when i
installed freebsd, they realy shouldnt overlap. im heavily using my
swap, so it should have crashed earlier that root label...
>>and they are located at the very beginning of all hard drives for speed
> Actually, you want your swap partition as close to the center of the
> hard drive as possible to minimize the movement of the drive heads,
> thus increasing the speed.
seems i was too fixated onto continouously read/write speed alone being
faster at the beginning ignoring the reposition of the heads from label
to label... but i still guess there is a chance the kernel does wait and
read/write in chunks, minimizing head-reposition over long distances,
doesnt it? there are even tunables about swap... hi_swap and so on wich
are realy of use...
should i benchmark where to locate and how to size it or will i only
gain performance far from being noticeable?
More information about the freebsd-current