Fast Ethernet network

I have a subnet running Fast Ethernet Cisco switches, Cat 5s and 2900s etc. most of the ports are set to 10Mbps half duplex but i want to know whether it is feasible to up the port speed to 100 half duplex.

On the same subnet are a number of servers, file and print, sms, shares etc.

All machines have 10/100 cards while the servers have 100mbps cards.

I’m being told that if i up the speed to 100 then the server will not be able to cope – all servers are new (1yr old) compacs – is this true?

Opinions, views and any pointers to helpful documentation welcome.

many thanks