"How do I figure out the SCSI HD current speed and does the mirror drive need to be the same?"
There is not enough in your post for exact answers, but here's the direction I would take.
1. As to speed. I watch to see if a SCSI BIOS is available and in those screens I look for the speed.
2. SCSI is a dangerous thing for the new SCSI configurators (you?) You get to learn all the various SCSI cable schemes, 50 and more cable types and what TERMINATION was used or is it the newer types? But the answer is that the new drive should be the same interface (SCSI encompasses some dozen types and speeds) and if the same interface, the higher speed is fine and will work.
3. Installing a new drive will stress a non-SCSI guru. So keep your head attached and keep researching.
-> My advice? Unless its a newer whizbang beyond ultrafast SCSI, I'd pop in some IDE drive, clone the drive over, remove the SCSI drive and cable then repair the OS on the IDE drive.
Believe it or not, when I do this, boot times drop and the machine runs faster than with those older SCSI drives.
I have an IBM intellistation M Pro 6894. I run Maya on it. I believe the HD is a SCSI. I want to use the Norton software to make a back up of the HD and put that away in storage.
Then install a second HD.
How do I figure out the SCSI HD current speed and does the mirror drive need to be the same?
Any/all advice would be of great help, because I am a Mac user but PCs rule when it comes to Maya.