[geeks] Cheap Dell Servers

Sandwich Maker adh at an.bradford.ma.us
Thu Feb 7 16:27:10 CST 2008


" From: der Mouse <mouse at Rodents.Montreal.QC.CA>
" 
" >> One thing I'm still trying to work out is how to set the disklabel
" >> drive parameters for a RAID.  What is the RPM of a RAID?
" > for a simple stripe it should be easy.  rpm is rpm of individual
" > disks;
" 
" What if they're different?  Say, one component on a 5400rpm spindle and
" one on a 7200rpm spindle?

i think this could be classified as a pathological case - you can
never set raid params to get max performance from all disks in this
situation anyway.

" > but if your software and your drives support tagged command queueing
" > it's probably all moot.
" 
" Yeah, worrying about RPM makes about as much sense as worrying about
" c/h/s geometry does - "none", unless you're using fairly old disks.

there might be, if all disks are [as usual] identical, and you could
specify c/h/s for more than one zone in the disklabel...  but with zbr
and the ability to enter only a single c/h/s, you're going to get it
wrong for most of the disk anyway.
________________________________________________________________________
Andrew Hay                                  the genius nature
internet rambler                            is to see what all have seen
adh at an.bradford.ma.us                       and think what none thought



More information about the geeks mailing list