Infortrend EonStor DS 3000 Series Quick Reference Manual page 15

Dual-controller
1st
JBOD
2nd
JBOD
. .
.
Last
JBOD
*
Refer to expansion guide for the maximum numbers of expansion enclosures. Dual redundant controller subsystems can connect with expansion enclosures by using fualt-tolerant links.
*
260cm SAS external cables are recommended while RAID subsystems are connecting the maximum numbers of expansion enclosures.
4U-60bay LFF subsystems
RAID System
Single-controller
2nd
JBOD
. .
.
Last
JBOD
13
RAID System
1st
JBOD
1st
JBOD
1st
JBOD
1st
JBOD