can we load redhat linux 9 in the same disk after loading solaris10 (o.s). Does it support

Yes you can as long as they are in different partitions. I have tried installing Linux while I still have Windows98 as my primary OS. It will also depend on your boot manager. But with Solaris, it will always be the primary.

Here's how you can install different OS in just one disk. Click the guide

Thank you. This discussion also helped me and I could do this and the guide provides was really useful. We like to have more useful tips like this.