Hello David, as Peter already pointed out, FICON is the better choice if it comes to performance. And most likely the channels are really the bottleneck.
Linux comes with the DASD statistics which may help you to determine the problem in detail. http://www.ibm.com/developerworks/linux/linux390/perf/tuning_how_tools_dasd.html More DASD performance hints and tips may be found here: http://www.ibm.com/developerworks/linux/linux390/perf/tuning_rec_dasd.html And there is a interesting redbook book available: The IBM TotalStorage DS8000 Series: Concepts and Architecture http://www.redbooks.ibm.com/abstracts/sg246452.html?Open Regards / Mit freundlichen Gruessen Mario Held Linux - architecture and performance IBM Germany Lab, Schoenaicher Str. 220, 71032 Boeblingen ---------------------------------------------------------------------- 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
