here's the situation :
first physical server (called dc1): hp proliant ml350 with win 2k8r2 with 2 virtual machines for files (files) and exchange (mail)
second physical server (backup): hp microserver with win 2k8r2 serving as a file server for backups
all connected to 100mbit LAN in one building
when I'm doing backup to remote share location from first virtual server (mail) onto hp microserver (backup) it takes 43 minutes to transfer 21gb of data
but when I'm backing up file server (files) onto the same microserver it takes 8.5 hours to transfer 39gb of data
- data is not being transfered at the same time
- both virtual machines are using standard virtual networking setups provided by hyper-v
- network adapters are : hp nc326i gigabit on dc1 and broadcom extreme on backup server
why there is such a difference in speed between those two backup procedured ?
where should I look for faults ?