Asus RS720-E7/RS12 - Manual (Page 60)

4-8 Chapter 4: Motherboard information
4.3 Internal connectors
2. Hard disk activity LED connector (4-pin HDLED1)
This LED connector is for the storage add-on card cable connected to
the SATA or SAS add-on card. The read or write activities of any device
connected to the SATA or SAS add-on card causes the front panel LED to
light up.
HDLED1
NC ADD_IN_CARD- ADD_IN_CARD- NC
PIN 1
• The actual data transfer rate depends on the speed of SAS hard disks
installed.
• Please install the SAS device starting from the gray connection.
• *About RAID 5 configuration, Please refer the 5.4.5 PCH SCU SAS
Configuration to setting.
1. ISAS connectors (7-pin ISAS1–4 [Gray], 7-pin ISAS5-8 [Black])
Supported by the Intel ® ASRK module, these connectors are for the SAS signal
cables for SAS hard disk drives that allows up to 3Gb/s of data transfer rate.
If you installed SAS hard disk drives, you can create a RAID 0, RAID 1, RAID
10, or RAID 5* configuration.