- Published: Monday, 07 December 2015 18:40
- Written by Davide Piumetti
When purchasing archiving devices it’s often hard to understand the differences between disks and SSD, Sata or Sas, between consumer, Nas or Enterprise tier products: the differences in terms of performances don’t justify the higher price in general. Let’s try to understand what changes in terms of reliability and technology.
All you need is going to the website of whatever hardware manufacturer’s site and browse the “disks” section to find -even still considering a single manufacturer!- an extremely wide device offering that goes well beyond the combination of SSD and traditional disks, and consumer or server/Enterprise tier product.
With that in mind, the simple distinction between Sata and Sas connections is not enough to justify the large variety. Models can differ both internally and from a connection perspective, as well from a usage perspective.
Let’s start to make a few distinctions by concentrating on 3,5” traditional disks with 7.200rpm speed. We can clearly identify at least 4 disk topologies:
SATA Consumer (ad esempio Seagate Desktop HDD, WD Blue, WD Green), 5 days a week, 8 hours a day, use
SATA uso NAS (Seagate NAS HDD, WD Red) 24h use but limited data transfer
SATA uso NAS aziendale (Seagate Enterprise NAS HDD, WD Red Pro) 24h use with intensive data transfer
SAS Enterprise (WD RE SAS) for server use
We’ve already simplified things a little bit in this list because several producers have introduced some variations and lots of different models. Moreover, if we take into account the server world too, then every manufacturer (HP, Dell, Lenovo, Fujitsu, etc..) has its models made perhaps by the aforementioned brands but with some modifications and adapted with some proprietary firmware.