AS-224J12 SAS3 JBOD 2U storage.

Key Features
1. 2U Storage JBOD Chassis with capacity 24 x 2.5" hot-swappable HDDs bays
2. Single Expander Backplane Boards support SAS3/2 or SATA3 HDDs with 12Gb/s throughput
3. 4 x Mini-SAS HD ports for Internal / External Cascading Expander Combination for high performance, high availability or high redundancy requirements
4. 1x IPMI port for Remote System Power on/off and system monitoring
5. Support NTP for time synchronization & RTC battery backup
6. 600W (1+1) 95% efficient Platinum level power supplies
7. 3 x 80mm high efficient hot-swappable fans for best system cooling
8. Ideal for Cloud backup, data Replication or High desnsity Archive Storage Applications

Host interface:
4 of SAS3 external connector (SFF-8644 /mini SAS HD) for host interface.
You can connect many this JBODs to SAS controllers in host machine.
RAID function should come from the SAS controller in your host machine, SAS controller (put into your host machine) is not included.

Make sure your controller can handle more than 24 physical drives.
Transfer rate: 12Gb per SAS channel

Internal:
SAS3 expander backplane to handle all 24 disk drives.
24 Hot-swap 2.5" hard disk bays.
Transfer rate per hard drive: 12Gb.
Internal SAS cables included.

Case:
2U rackmount chassis, Dimensions : 3.5"(H) x 17.2"(W) x 24.8"(D)
600W redundant hot-swap power supply included. 80+ Platinum
Hot-swap cooling fans included.
Rackmount rail set included.
Hard disk drives are not included.