What are the RAID levels in different cloud failover appliances?

By default, each cloud failover appliance (CFA) is provisioned with a predefined RAID level.

Current models

Model	960	965	1260	1265	1550	2750	4550
Usable storage	2 TB / 4 TB / 6 TB	6 TB	2 TB / 4 TB / 6 TB	6 TB	8 TB / 12 TB / 18 TB	32 TB / 40 TB / 60 TB	84 TB / 126 TB
Architecture
CPU	Intel Core i3 @ 3.6 GHz, 4 cores	Intel Core i5 @ 2.8 GHz, 6 cores	Intel Core i3 @ 3.6 GHz, 4 cores	Intel Core i5 @ 2.8 GHz, 6 cores	Intel Xeon E5-1620 v4 @ 3.5 GHz, 4 cores	Intel Xeon E5-1650 v4 @ 3.6 GHz, 6 cores	Intel Xeon E5-1660 v4 @ 3.2 GHz, 8 cores
CPU upgrade	N/A	N/A	N/A	N/A	Up to 18 cores @ 2.1 GHz	Up to 18 cores @ 2.1 GHz	Up to 18 cores @ 2.1 GHz
RAM	16 GB, 2666 MHz, DDR4	32 GB, 2666 MHz, DDR4	16 GB, 2666 MHz, DDR4	32 GB, 2666 MHz, DDR4	64 GB, 2133 MHz, ECC, DDR4	128 GB, 2133 MHz, ECC, DDR4	256 GB, 2133 MHz, ECC, DDR4
RAM upgrade	N/A	N/A	N/A	N/A	Up to 256 GB	Up to 256 GB	N/A
SSD	256 GB	256 GB	256 GB	256 GB	240 GB	480 GB	960 GB
HDD	2 TB / 4 TB / 6 TB @ 7200 rpm	6 TB @ 7200 rpm	2 TB / 4 TB / 6 TB @ 7200 rpm	6 TB @ 7200 rpm	4 TB / 6 TB @ 7200 rpm	4 TB / 6 TB @ 7200 rpm	4 TB / 6 TB @ 7200 rpm
Hot-swappable HDD bays	2 HDDs	2 HDDs	2 HDDs	2 HDDs	4 HDDs	12 HDDs	24 HDDs
RAID level	RAID 1	RAID 1	RAID 1	RAID 1	RAID 5	RAID 6	RAID 6
Ethernet	2 × 1 GbE, IPMI	2 × 1 GbE, IPMI	2 × 1 GbE, IPMI	2 × 1 GbE, IPMI	2 × 10 GbE, IPMI	2 × 10 GbE, IPMI	2 × 10 GbE, IPMI
Physical specs
Form factor	Desktop NAS	Desktop NAS	1U	1U	1U	2U	4U
Width × Depth × Height (in.)	10 × 5.5 × 7.1	10 × 5.5 × 7.1	16.8 × 22.6 × 1.7	16.8 × 22.6 × 1.7	17.2 × 19.85 × 1.7	17.2 × 25.5 × 3.5	17.2 × 26 × 7
Weight (lb.)	7	7	27	27	42 (without HDDs)	56 (without HDDs)	79 (without HDDs)
Power
Power supply unit	1 × 250 W	1 × 250 W	1 × 350 W	1 × 350 W	1 × 350 W	2 × 480 W	2 × 600 W (1000 W @ 100–140 V, 50–60 Hz; 1280 W @ 180–240 V, 50–60 Hz)
Voltage	100–240 V, 50–60 Hz	100–240 V, 50–60 Hz	100–240 V, 50–60 Hz	100–240 V, 50–60 Hz	100–240 V, 50–60 Hz	100–240 V, 50–60 Hz	100–240 V, 50–60 Hz