On 9 November 2012 23:52, Marcy Cortes <[email protected]> wrote: > Ok, no shortage of spares here. So I tried it. Not good. > > dasdfmt of 10000 cyl - non PPRC non XRC - 1:55 > ICKDSF of 10000 cyl - non PPRC non XRC - 1:13 > LXFMT of 10000 cyl - non PPRC non XRC - 2:10 > > > dasdfmt of 10000 cyl - PPRC, XRC'd - 5:00 > ICKDSF of 10000 cyl - PPRC, XRC'd - 1:29 > LXFMT of 10000 cyl - PPRC, XRC'd - 5:15 > > So, actually worse than dasdfmt.
That's 15 seconds more for 150,000 tracks. That 0.1 ms per I/O might be when they don't do short writes and transfer zeroes to the disk... Think at 4 Gb/s the 50KB per track would be around 0.1ms (but it's too late for math here now). Rob ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
