4xEIDE'99 ?

[PanterHZ]

No real difference in speed with this one, same speed as connecting straight to the onboard IDE.

Not entirely true, since buffered IDE adapters allows for a higher MaxTransfer value to be used on the partitions (0x1FFFE instead of 0x1FE00). This should give a slight increase in speed.

[PanterHZ]

Hi well this brings me to another question do I really need one as I am only using a CD drive and a CF card so could I not just connect the two to the correct cable and make sure one is master and one is slave and if so where would I get the software from to run it all lol , Brian
 

As long as both devices can be set to either master or slave (has jumpers for this), you should have no problems. If any of them lack master/slave jumpers, it may not work since it then most likely is cable-select only.

[PanterHZ]

Would a buffered interface benefit an 020 or 030 accelerated A600? I read some where that it doesn't. If it does, I might have to get one myself one.

Not sure if it's really worth it. The slightly higher speed it can offer may be considered as an extra "bonus" if you already have such an interface.

[PanterHZ]

Are you running one in your A1200? I am, no real speed gain between using one and the onboard.

FastATA and my 060 on the other hand is a massive increase.

I have a IDEfix Express in my main A1200, and one of those cheap 4-way adapters that AmigaKit sold a few years ago in my other A1200.

The speed gain mainly goes for when large files are being copied, under normal use the difference isn't really that big. If the MaxTransfer value is set to 0x1FE00 or lower on the partitions, the speed will of course not be any faster.