The actual performance may be lower than lab testing figure due to differences in server configuration, deployment, and the number of active operations. I am currently using only two of the DX517's five bays, for a total storage of 46 TB across six 8 TB drives, and a total occupancy of 25 TB (54%). Each 8 TB drive has 7.676 TB storage available. The NAS's operating system reserves 0.324 TB of space on each drive. Filling the remaining three bays with 8 TB drives would provide 69 TB total storage with a currant occupancy rate of 36%.

I have a DS918+ with 4x8TB WD White drives in a SHR1 array that is running out of space. I’m not looking for opinions about the efficacy of SHR1 vs SHR2 vs the various RAID arrays. My question is specific to Plex as I use my NAS primarily as a Plex media storage device.I currently have all of my media on volume1. I’ve heard/read that trying to span volume1 across the DS918+ and DX517 is a recipe for disaster, so if I get a DX517 expansion unit would I be able to put new media on volume2 and have Plex/Sonarr/Radarr play nice with the new storage pool? Power consumption is measured when it is fully loaded with Western Digital 1TB WD10EFRX hard drive(s).

SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, Fibre Channel, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV Extend the standard 3-year hardware warranty of your DS1821+ with 2 more years of Synology-certified support and premium services that help you recover faster in the event of disaster. the number of connections that can be maintained when the recommended number of hosted files was reached) Managed from DiskStation Manager on the host NAS, the additional bays in the DX517 are immediately ready to be used once connected. On-the-fly volume expansion ensures that storage and services on the host are not interrupted during volume expansion. I upgraded from a Drobo to a ds1621+ a few months ago and it has been great! I made what seems to be a common mistake (given other posts here) and assumed that the DX517 expansion unit would seamlessly give me another five drive bays for when I was ready to expand. I have accumulated a number of hard drives in the process of upgrading and like the idea of putting them to use, but in reading about the DX517 it seems it'd be fine to create a second storage pool, but it's extremely risky and poor practice all around to spread your volume between the drives in the main NAS unit and drives in the expansion unit. This sub has talked me out of that idea - I don't want to risk it.

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