Ted, I like to see the documentation. The Channel measurement block records connect time and SRM in turn converts that to IO service units. Are you saying that 8.3ms was equivalent to 1 IO service Unit?
If that's the case it still seems strange as I thought they would at least use something that divides exactly by 128 microseconds. Ron > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf Of > Ted MacNEIL > Sent: Thursday, August 13, 2009 4:52 PM > To: IBM-MAIN@bama.ua.edu > Subject: Re: [IBM-MAIN] Degraded I/O performance in 1.10? > > >It was probably a good value to use aeons ago when it took a real SLED 3390 > 16.67 ms. to spin around once, so 8.3 ms. was 1/2 revolution. >Today, > however, is aeons later as far as the hardware is concerned, especially > channel speed when delivering data from controller cache instead of straight > from the platter. > > Talk to IBM! > I didn't make up the number. > It's just what it is. > > - > Too busy driving to stop for gas! > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO > Search the archives at http://bama.ua.edu/archives/ibm-main.html ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
