Hello Guo, My experience is several (well, OK, 10+) years old, and may have been limited by contractual obligations I was not made aware of. I was essentially a low-level tech at the time, and wasn't in on any of the decision-making. So take this with that in mind. My one experience with SUN involved a server that no one but one trained person at the company was allowed to touch in any way. That one person (not me) was required to take an expensive training course which basically gave him the power and SUN-granted authority to reboot the machine when needed and be their tech support liaison. That's it. Any upgrades needed or wanted were done by SUN technicians sent out from wherever SUN technicians came from, at a very significant cost per day plus travel expenses. Also, we had a hard drive in that server fail once, and we got charged something like $12K to for the part and to have two techs come out and replace it and restore the system. I thought, then and now, that it was absolutely ridiculous. In our case, it was a poor decision by non-tech management to purchase a telephone messaging system to run on a SUN server rather than some other perfectly acceptable PC-based solution. I know that SUN has an overall good reputation as powerful and reliable machines, and I suspect that the biggest problems financially that we had was due to a poorly negotiated or perhaps non-existent support contract. The company, which I no longer work for, was notorious for being penny-wise and pound-foolish; or to say it another way, it wouldn't surprise me at all to find out that they were happy to spend anywhere from $10K to $100K or more on the machine and software, but balked at, say, a $1K/year support agreement. That would be very typical of the way things were done there. So to answer your question more directly, I don't know if you could do your own upgrades or not, but I suspect not. As I understand it, the SUN hardware is all proprietary, although these days they may be using off-the-shelf parts. And my advice is to look at the support terms very closely and negotiate as hard as you're able to on both the price of the workstation and the support contract -- assuming you have no choice but to go with SUN. My two bits. Hope it's worth what you paid for it :) Ron Thursday, September 2, 2004, 6:02:54 AM, you wrote: GY> Hello, GY> Does anybody have advices on buying a SUN workstation. GY> I need make a dicision to buy a SUN workstation for my company. I want to GY> know more about the hardware of SUN. Could I add hard disk or memory by GY> myself? GY> Thanks For a web-based membership management utility and information on list policies, please see http://nibec.com/24hoursupport/ To unsubscribe, send a blank email to 24hoursupport-request@xxxxxxxxxxxxx with "unsubscribe" (without quotes) in the subject.