AS-212JS1 JBOD storage.
Host interface:
1 of SASx4 external connector (SFF-8088) for host interface.
You can connect many AS-212JS1 to SAS controllers in host machine. For performance and reliability, to cascade AS-212JS1 together is not supported.
RAID function should come from the controller (option).
Transfer rate: 3GB per SAS channel, 4 channels total 12GB

Internal:
SAS expander backplane for 12 SAS or SATA hard disk drives.
12 Hot-swap 3.5" hard disk bays.
Transfer rate per hard drive: 3GB.
Internal and External SAS cables included.

Case:
2U rackmount chassis, Dimensions : 3.5"(H) x 17.2"(W) x 25.5"(D)
800W redundant hot-swap high efficiency power supply included.
Hot-swap cooling fans included.
Rackmount rail set included.
Hard disk drives are not included.