How to determine the primary and secondary drives?

[Rodf 1]

I'm hoping that after waiting for more than a month, to get a hard drive adapter, I'll finally be able to switch out the failing HD in my 5 year old Dell XPS desktop, with a SSD drive. I looked up my machine on the Dell website and saw that it uses SCSI for the hard drives' communications, so I bought a SCSI SSD. 

 

However, I have 2 HD's in that machine, the second one is just a regular HD, like the original HD. How do I determine which is the primary drive and which is the secondary drive?

[Trig0r 189]

Motherboard manual?

 

You could just take both drives out for now, install the SSD and then once you're all back up and running put the other drives back in, reformat them and use them for storage, regardless of what connector they are.

[itGeeks 184]

You could also for simplicity remove only 1 drive and turn on the computer, if it says no boot drive then you no you have the right one.

[schoondoggy 841]

What model SSD did you buy?

In Windows go to device manager, look under Disk drive to see what is listed.

Then in Windows go to Disk management to confirm how they are configured. 

Be sure all of your data is backed up.