User manual

HARDWARE INSTALLATION

Step 5-5. Connect the Min SAS 4i to Min SAS 4i Cable

Model ARC-1231ML/1261ML/1280ML have Min SAS 4i (SFF-8087)

internal connectors, each of them can support up to four SATA

drives and SGPIO (Serial General Purpose Input/Output) side-band

signals . These adapters can be installed in a server RAID enclosure

with a Min SAS 4i internal connector backplane. Min SAS 4i cables

are not included in the ARC-12XXML package.

This Min SAS 4i cable has eight signal pins to support four SATA

drives and six pins for the SGPIO (Serial General Purpose Input/

Output) side-band signals. The SGPIO bus is used for efcient LED

management and for sensing drive Locate status. Please see page

52 for the details of the SGPIO bus.

The SGPIO signal can carry the fault/activity signal without needing

any individual LED cable. The SGPIO is included in the SFF-8087.

Figure 2-17, Min SAS 4i to Min SAS 4i Cable

• Min SAS 4i Connector (SFF-8087) Signal

Figure 2-18, Min SAS 4i (SFF-8087) Connector