Lars Tunkrans wrote: > Hi > > I was trying to watch I/O today as I installed x86 B72 on one of my > PC's > this was ( obviously ) my first real use of the nv_sata driver. > > The box I have here has a 10.000 rpm SATA system drive and the > Nvidia nforce4 > chipset. prtconf -D showed that the nv_sata driver was used during > installation. > > The DVD unit is a fairly modern NEC DVD R/W Dual Layer unit about > 1-2 years old. > > I ran "iostat -xn 10 100 " repeatedly during the installation. > > the final mean values ended up such that the DVD had a busy value of > 66% > often peaking above 90% during the 45 minutes install run. > > The system disk busy mean value was only 12 % and was hardly ever > higher > than 50 % during the run. > > I Have read many of these discussions about the > /var/sadm/install/contents > file being the bottleneck for faster installation, > But have you rellay looked a the time Consumed by the DVD player. > > The bottleneck on this system is the DVD unit. > If I could somewhere find a mythical 30x speed DVD unit I assume > Install time would drop drastically. > > I should try doing a Jumpstart with B73 > oh well , that was my 5 cents. > > //Lars >
Note that %b isn't very useful if the drive is speeding up and slowing down or seeking. The more interesting question is MB/sec from the dvd drive during the install. - Bart -- Bart Smaalders Solaris Kernel Performance barts at cyber.eng.sun.com http://blogs.sun.com/barts
