Keith, You could mitigate this somewhat by creating more disk storage pool volumes, and spreading them across more physical disks.
I don't entirely agree with Allen that your disk pool is going to be slower than your incoming networks. It is certainly possible to build a disk storage pool environment that can respond that fast. However, you have to decide whether it is worth spending any money to do so. How close are you to running outside your backup window? If you are getting all your backups done in a timely manner, then the actual speed doesn't matter. But if you are pressing your window, you might have justification for some engineering improvements. Best Regards, John D. Schneider The Computer Coaching Community, LLC Office: (314) 635-5424 / Toll Free: (866) 796-9226 Cell: (314) 750-8721 -------- Original Message -------- Subject: Re: [ADSM-L] mediawait during backup to disk From: "Allen S. Rout" <a...@ufl.edu> Date: Fri, April 30, 2010 10:14 am To: ADSM-L@VM.MARIST.EDU >> On Fri, 30 Apr 2010 11:07:35 -0400, Keith Arbogast <warbo...@indiana.edu> >> said: > What does it mean when a node incurs mediawait during a backup to > disk? It means that the process was blocking on disk writes. Your disk (usually) can't write as fast as your various networks can pass you data. So there's some fraction of media wait, on a fine granularity. - Allen S. Rout