Asus Z8NA-D6 - Manual (Page 50)

2-30 Chapter 2: Hardware information
2.7.2 Internal connectors
1. Serial ATA connectors
(7-pin SATA1, SATA2, SATA3, SATA4; RED)
(7-pin SATA5, SATA6; Black)
Supported by the Intel
® ICH10R chipset, these connectors are for the Serial
ATA signal cables for Serial ATA hard disk drives that allows up to 3Gb/s of
data transfer rate.
If you installed Serial ATA hard disk drives, you can create a RAID 0, RAID 1,
RAID 10, or RAID 5 configuration.
The actual data transfer rate depends on the speed of Serial ATA hard disks
installed.
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.