It is for home use. The two most important things to me are 1) speed (RAM, I assume)- I am very impatient and have little time so quick access to data is imperative. 2) back up- this will house all of our data, including irreplaceable pictures and documents, so we want a secure backup (RAID? Although I don’t know which would suite us best?) I’ve seen the DS918+ and 1517+ but honestly cannot understand all the tech terms!
DS918+ is indeed the fastest NAS in the range. So far it looks like it will be the best seller of the year. It has cache ports and also RAM is upgradable. On top of that, you get 2 LAN ports which help a lot if there are multiple users accessing it un transferring data one or another way. DS1517+ difference is that it can have 10GbE NIC, for high-IOPS. That is for super fast backups and editing tasks and requires extra purchase of a card for a NAS and a PC, cables and 10GbE switch. But very unlikely this is what you need.
You can choose between 3 RAID types to protect your data:
RAID1- having all data replicated on each of 4 drives
RAID5 (SHR1)- using one drive for redundancy to keep your data safe.
RAID6 (SHR6) – using two drives for redundancy to keep your data safe.
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