Dual-Path Connection; Dual-Path With Cascaded Jbod 2000; Figure 42. Dual-Path Connection; Figure 43. Dual-Path With Cascaded Jbod 2000 - Intel JBOD 2000 Hardware Manual

JBOD 2000 External SAS Connection Mode Overview Intel® Storage Server System JBOD 2000 Family Hardware Guide
7.5.3

Dual-path Connection

Dual-path means a host has redundant pathways to the storage device. When any part of the
data pathway to a SAS domain fails, data transfer will not stop. This is one advantage of dual-
path connection. Dual-path implementations cost less than dual-domain SAS implementations
but do not provide the full redundancy like a dual-domain SAS solution.
Figure 42 shows the dual external mini-SAS connectors of the SAS HBA or RAID adapter
connecting to JBOD 2000 with two mini-SAS cables. Each single controller port incorporates
four SAS lanes for a total maximum throughput of 2400MB/s with SAS 2.0 technology. SATA or
SAS hard drive can be supported. The SAS HBA or RAID adapter can handle either mini-SAS
cable disconnection and maintain the data transfer between the host and JBOD 2000.
7.5.4

Dual-path with Cascaded JBOD 2000

Dual-path to a single-domain provides tolerance of cable failure. Two single-port JBOD 2000
systems are cascaded with a mini-SAS cable between each "B PRI" SAS port, and a controller
connects to each "A PRI" SAS port with two mini-SAS cables. Any mini-SAS cable failure will
not stop the data transfer between the host and two JBOD 2000. Both SAS and SATA drives
support this configuration.
48

Figure 42. Dual-path Connection

Figure 43. Dual-path with Cascaded JBOD 2000

Revision 1.42