03-04-2021, 02:40 PM
Yes, you can have multiple RAIDs and volumes in a single NAS. With a 4 bay NAS you can use 3 bays for storage and a spare one for automated RAID rebuild or storage expansion later.DS420+ and DS920+ come with multiple LAN ports. You can have RAID1 for storage and a single drive or RAID1 on another drive or two. Having a separate LAN and drive for surveillance will be beneficial. The main storage array will not be kept busy with surveillance all the time. This will speed things up.For a 30 day recording, you will need 2TB. But you can play with configuration in this calculator:https://www.synology.com/en-uk/support/nvr_selector?cameraNumber=2&storeDays=30&perdayhour=24&hdmi=0&codec=H.264&resolution=1920&fps=15&mbps=3.25I hope this helps.