Very, very low depth impact. Fits in most 19" racks.
Suited for private use as well as SOHO.
Upgradable to 16GB of RAM.
Upgradable to 12 disks with RX418 (RX42x ?).
Possibility to add an expansion card for NVMe Cache OR 10Gb Ethernet, not sure that there is one card with both.
I chose the Cache expansion card with 2x WDred 1To (not sure such a size was really necessary...)
4xRJ45 with link aggregation => 4Gb bandwidth, that's good enough for me.
High availability compatible with RS1221+
Fans are 80mm diameter so I changed them with Noctua ones (not PWM).
Populated with 12 6TB WD red HDDs. Vol. 1 is 11 disks in shr2, vol.2 (surveillance) 1 disk in SHR (w/o protection ^^).
Mainly used as file server, Drive server and for surveillance cams (I have 10 cams).
VM and docker mostly used for testing purposes, prior to Raspberry Pi implementation (if possible).
