What are the metrics and their priorities to compare various hard drives and their accessories for servers?
Not sure what you mean by accessories, though, so some guesses:
Priorities are totally dependent on what you need the server to do and what your budget is.
I.e. if you just need a box to dump files on, without the need for zero downtime and high speeds, you could use server class SATA drives and a software RAID, but if you have a medium-sized database where you need extremely fast query times, you might use a fast SSD drive. So please tell us what you want to do so you can get more helpful infos.
There are many comparison factors such as:
1- Speed / RPM.
2- HD drive is hot-swappable or not.
4- Form factor.
6- Power consumption.
The priority depends mainly on your needs / requirements.