Hi everyone,\n\nI recently migrated to an MSA1500 based SAN. I have the following config:\n\nMSA1500 with redundant controller, but did not purchase the extra 128MB\ncache upgrade (DOH)\n2x MSA30's loaded with 72GB 15k U320 drives (all LUNS are 0+1)\n1 MSA20 with 7.2k 160GB SATA drives (1 LUN and it is raid5)\n1 4 port Brocade 2GB switch\n1 Server running 2003 Enterprise (For now)\n\nNow, everything works, but the performance seems really subpar. When I do a\nbackup from the MSA30 to the MSA20, I get like 7 MB/s. That's truly awful.\nI'd be better off backing up to USB at that rate. So I ran some benchmarks\nwith Iometer, and it claims to be able to do like 100MB/s from both the\nMSA30 and MSA20. However, when I do drag n' drop benchmarks in Explorer, I\nget the following results:\n\nCache set to 20% Read / 80% Write\n-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\nMSA30 to Local C: 9.8 MB/s\nLocal C: to MSA30 33 MB/s\nMSA20 to Local C: 19.25 MB/s\nLocal C: to MSA20 12.25 MB/s\n\nMSA30 to MSA20 8.16 MB/s\nMSA20 to MSA30 18.58 MB/s\n\n\nCache set to 80% Read / 20% Write\n-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\nMSA30 to Local C: 29.94 MB/s\nLocal C: to MSA30 19.96 MB/s\nMSA20 to Local C: 59.8 MB/s\nLocal C: to MSA20 8.29 MB/s\n\nMSA30 to MSA20 6.73 MB/s\nMSA20 to MSA30 19.96 MB/s\n\nSo it looks like the cache REALLY matters. I am going to put in the cache\nupgrade based on this. However, the fact that Iometer reports such\ndifferent results than doing drag n' drops, that makes me wonder if there is\nsomething in Windows that I could tweak?\n\nAny thoughts would be appreciated.