He should be seeing about 9 MB's/sec on that single ESCON setup. Adding an ESCON channel should half the backup time with a total throughput of 18 MB/sec with the 2 ESCON's. I just did some prep work prior to our DR with regards to a similar setup, ESCON and 3590 B's.
"Eric N. Bielefeld" <[EMAIL PROTECTED]> Sent by: IBM Mainframe Discussion List <[email protected]> 05/15/2006 12:43 PM Please respond to IBM Mainframe Discussion List <[email protected]> To [email protected] cc Subject Re: question to backup on 3590 I'm sure that two escon channels would greatly speed up your backups. I had a similar experience at P&H Mining around 2000. We got 4 3490E drives, and 1 controller with 2 escon channel interfaces. That was 16 transports for 2 channels. I think the backups actually took longer than with 24 3480 transports, with 2 parallel channels for each 6 transports. I quickly realized that we didn't have enough channels. After getting 1 more controller with 2 more channels, the backups took about half the time. Looking back, I should have gotten 2 more controllers. When monitoring the pack backups with RMF, the channels were 100% busy, showing lots of delays on the tape drives. I'm sure another escon channel will make your backups take half the time or slightly more. Eric Bielefeld Sr. z/OS Systems Programmer Milwaukee Wisconsin 414-475-7434 ----- Original Message ----- From: "Pohlen (Mailinglist)" <[EMAIL PROTECTED]> > Hi listers, > > I have a customer who backs up a data amount of about 500 GB with 2 Jobs > each day on a 2-drives-3590 with DSS. Because of data growth, he has now > problems with his batch window. His 3590 (A50/B11) is connected to his R36 > by one escon channel. During the backup the channel is completely busy. I > have thought about a quick method to drop down the backup time by > connecting > a second channel. Is this possible and would this help him. He has > experienced, if he runs only one job at a time, the backup time of this > single job is significantly faster. Therefore I assume, that a second > channel could help him. > > Mit freundlichen Grüßen / best regards > > Franz Josef Pohlen ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
