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The following is from a Tape speeds and feeds document I got a while back. I hope the formatting holds. I beleive you can get most the info from the following documents: http://www-1.ibm.com/servers/eserver/iseries/perfmgmt/resource.htm Other Performance Numbers for reference (user mix data): DVD 1.5 GB/hr from Steve Hank's note (check for official number from perf capabilities guide) DVD - no compression 2.5 GB/hr from V5R2 Perf Guide (note restore is faster than save) DVD - w compression 6.5 GB/hr from V5R2 Perf Guide (note restore is faster than save) 1.2-2.5 GB QIC 1.8 GB/hr from Bruce Masters' Chart 7208-12, 222-234 2.5 GB/hr from Bruce Masters' Chart 13 GB QIC 5 GB/hr from Bruce Masters' Chart MLR1 QIC 7.5 GB/hr from V5R1 Perf Guide MLR3 QIC 9 GB/hr from V5R1 Perf Guide 7208-342 10 GB/hr from V4R5 Perf Guide, in section re V4R3 perf 3570-B 13 GB/hr from above SLR 100 QIC 22 GB/hr from V5R1 Perf Guide <<<< comparable to 3570-C 3570-C 22 GB/hr from above VXA-2 8mm on 8xx 36 GB/hr from above LTO-1 SCSI on 8xx 68 GB/hr from above LTO-1 fibre on 8xx 78 GB/hr from above Savefile (=<V5R1) 135-170 GB/hr from V5R2 Perf Guide (user mix/very large file) - 2002 version Savefile (=>V5R2) 200-480 GB/hr from V5R2 Perf Guide (user mix/very large file) - 2002 version Savefile on fc 2757 ioa 225-550 GB/hr from V5R2 Perf Guide (user mix/very large file) - May 2003 LTO-2 SCSI on 8xx tbd LTO-2 fibre on 8xx 110 GB/hr from above ---------------------------- Bryan Dietz Aktion Associates midrange-l-bounces@xxxxxxxxxxxx wrote on 02/01/2005 05:27:27 AM: > Hi Charles > > without wanting to provide quotable benchmarking figures, yes the DVD's are > incredibly slow. My recollection is something like 4 1/2 hours for a system > save versus about 45 minutes in a 3580 (thereabouts anyway). > > I was also disappointed that they are not supported by BRMS. I'm taking > this as a sign, > > Regards > Evan Harris > > >Ok, > > > >Some more info. > > > >On the SAVSAVFDTA job, for a long, long time, the job showed 39 > >milliseconds of CPU time used. > > > >But finally, after about 70min. The job finished, only showed 1 second > >used of CPU time. > > > > > >Now, for comparison, the creation of the save file took only about > >5min. The save file size ended up being just over 3 gigs. > > > >Is 45 MB/min correct or what? My PC DVD burner, using an RW disk with the > >packet writing driver InCD, does much better than that. > > > >Charles Wilt > >iSeries Systems Administrator / Developer > >Mitsubishi Electric Automotive America > >ph: 513-573-4343 > >fax: 513-398-1121 >
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