I am building server for virtualization and wanted to go with VMWare ESXi 5. I configured RAID10 on 4 disks connected to internal RAID controller IBM M1015 (identical to LSI 9240-8i) and installed ESXi without any problems. Only problem is that copying data to datastore (on the RAID array) on host is slow - around 20MB/s. And I get about the same speed when trying to copy data to shared folder on guest virtual machine. Host network is autonegotiated 1000Full with 1000Mbit switch and I used vmxnet3 vm card in guest machine.
When I install MS Hyper-V on the exact same server with the exact same RAID10 array I get speed around 110MB/s when copying data to the Hyper-V host.
I used latest available drivers for every system:
ESXi 5 - LSI_5_34-455140.zip\scsi-megaraid-sas-5.34-1vmw.500.0.0.406165.x86_64.vib
Windows - 5.2.112
I even updated card firmware to 20.10.1-0077 .
This card is entry level but recommmended on different places for ESXi. What am I doing wrong? Am I missing something?