Hi all Our IT recently switched the storage system for the hole company. Now we have a NETAPP storage system. During this migration they moved (without asking!) our SQL-database from the local virtual (vmware esx3) harddrives to the NETAPP. My perfmon-logs show the following: DatumStartEndePhys. Disk: % Disk timePhys. Disk: Avg. Disk Q. L. writePhys. Disk: Avg. Disk Q. L. readProcessor: % Processor time Av.Min.Max.Av.Min.Max.Av.Min.Max.Av.Min.Max. 10.07.200808:0011:000.4890.00311.8770.0020.0000.1060.0180.0000.4735.3730.23428.659 28.10.200808:0011:001.7450.01261.9710.0510.0002.3660.0190.0000.4639.7980.32636.823 11.12.200813:0516:052.1230.00455.2150.0460.0002.2030.0390.0001.0678.8650.26049.388 12.12.200808:0011:002.4940.00456.5750.0300.0002.2330.0700.0000.7699.5260.27337.904 NETAPP Phase 2 15.12.200808:0011:007.9570.01365.5760.0350.0011.2770.2840.0002.61211.4230.26053.177 15.12.200813:0016:004.6750.035127.8120.0540.0011.5130.1330.0004.2978.4030.41736.328 16.12.200808:0011:008.4750.01283.2610.0430.0001.8780.2960.0003.32210.4900.23452.695 16.12.200813:0016:008.8270.042103.6530.0640.0011.6020.2890.0003.30214.4950.83345.182 19.12.200808:0011:008.1880.01666.1190.0240.0010.8710.3030.0002.62510.0980.28650.703 19.12.200813:0016:007.8500.015105.0430.0350.0011.0720.2790.0004.16510.7770.23438.646Write speed: NETAPP is faster We can verify this in our application This might be because of the bigger cache? Read speed: NETAPP is way slower All read-intensive tasks in our application are noticeable slower My questions: Do those numbers in the table verify my statements above? There are only small changes of the numbers, but you can feel it clearly in our application. Is ist justifiable to ask the IT do undo the migration for our SQL-database? What's your opinion? Sorry that I can't deliver more details. But thanks for any advise. Reto E.