I have now (with the help of this helpline)installed a new hard drive in my pc,via the sata conecter. The other hard drive is installed via IDE connections but the ide cables are disconnected.This hd is installed as master. I am now wondering if I can now connect this drive and what will happen, leaving both connected.
I trieds this on one occasion and found that the system insisted on booting from the IDE drive rather than the SATA drive. I never followed this through as I was able to connect via a USB alternative, but be aware you may also have problems.