BOSS controllers

BOSS Card	Drive Size	RAID levels	Stripe size	Virtual disk cache function	Maximum number of virtual disks	Maximum number of drives supported	Drive types	PCIe support	Disk cache policy	Support for Non-RAID disks	Cryptographic digital signature to verify firmware payload	Hot Plug
BOSS S1 Adapter	M.2 devices are read-intensive with 240GB or 480GB capacity	RAID 1 and Non–RAID	Supports default 64K stripe size only“	Write through	1	2	6 Gbps M.2 SATA SSDs	Gen 2	Drive default	Yes (supports up to two disks)”
BOSS S1 Modular	M.2 devices are read-intensive with 240GB or 480GB capacity	RAID 1 and Non–RAID	Supports default 64K stripe size only“	Write through	1	2	6 Gbps M.2 SATA SSDs	Gen 2	Drive default	Yes (supports up to two disks)”
BOSS S2	M.2 devices are read-intensive with 240GB or 480GB capacity	RAID 1 and Non–RAID	Supports default 64K stripe size only“	Write through	1	2	6 Gbps M.2 SATA SSDs	Gen 2	Drive default	Yes (supports up to two disks)”	Yes	Yes