The HTTPS address is "downloads.dell.com"  and no more is needed. It will point automaticly to the dell default catalog. It took up to 30 - 45sec. and you need to scroll down to see the result and the action buttons. [IMAGE]    
Hi all, I'd appreciate some help figuring out why my disk subsystem performance is REALLY below expectations. Activity: Copying a 140GB Linux guest (single VMDK) to another directory on the same array from an SSH session to the server. Server: PE R630, 2 x E5-2680 v4 CPU, 128GB Drives: 7 x 900GB 10K SASController: Embedded PERC H730 mini, 1GB enabled battery-backed cache, read-ahead and write back configuredDrive configuration: RAID 5 (1 global hot spare)OS: ESXi 7.0U3 with Dell offline driver VIB The table below shows typical performance: Name                   Unit         Average        Maximum       Minimum      LatestTotal disk usage       MB/s         27.55          454.19         3.35        14.05Total read rate        MB/s         8.99           149.51         1.25        3.48Total write rate       MB/s         18.56          304.68         0           10.57Maximum latency        ms           12.28          49             0           13Read rate (ARRAY)      MB/s         8.99           149.51         1.25        3.48Write rate (ARRAY)     MB/s         18.56          304.68         0           10.57 The ESXi disk performance graph is REALLY peaky, with intervals of about 1 minute long with very high throughput, random pause averaging 5 minutes, big standard deviation, another minute or so of very high throughput, etc. This seems perfectly correlated with array latency, since the periods of low throughput match up perfectly with high latency and vice versa. Is this just the nature of RAID 5 or is there some way that I can improve this? This is what the iDRAC says about the controller (edited to fit): Name                      Device          Firmware    Driver       Cache Memory SizePERC H730 Mini (Embedded) Integrated RAID 25.5.9.0001 7.722.02.00  1024 MB I tried the copy from the ESXi web interface and the performance was even worse :-(. Thanks for any suggestions. PS I'll try to replicate the situation on an old PE 1950 III I have at home with a pair of mirrored 750GB SATA disks and a non-caching controller just for the heck of it. Perhaps mirroring is the way to go but that'll require an entirely new set of drives in the array :-(. PPS I just downloaded OMSA for the R630. I'll see if that has anything useful.
Puzzlingly slow RAID 5 performance and suggestions to improve