The durability of a SCSI drive compared to an EIDE drive makes the SCSI a better choice in a server. A server is up for days and days and days and of course it does hold all of the software and data available on the LAN plus all of the user accounts etc. We could however, use lesser expensive EIDE drives. Depending on which drive type we choose, we must indicate that choice in the first part of the ARC naming string. OK, this is a little weird.
Lets take the first part.
It is either 'multi' or 'scsi'. Only enter the correct one, the other is left out. Well, even that isn't clean, cut and dried. The variable 'x' after it indicates which drive controller of possibly several actually has that 'multi' type drive connected to it. Example, most machines now have built in IDE controllers.