Chapter 2
2-14
ATA133 RAID Connectors: IDE3 & IDE4
(for 845 Ultra-AR & 845 Ultra-ARU only)
The
845 Ultra-AR
&
845 Ultra-ARU
mainboards offer high-end Ultra
ATA/133 RAID (0 or 1) hard drive interface specifications supported through
Promise
®
PDC20276 controller .
The Ultra ATA/133 interface boosts data transfer rates between the com-
puter and the hard drive up to 133 megabytes (MB) per second. The new
interface is one-third faster than earlier record-breaking Ultra ATA/100 tech-
nology and is backwards-compatible with the existing Ultra ATA interface.
The low-cost RAID (Redundant Array of Independent Disks) solution
integrates two IDE RAID connectors that support PIO mode 0-4, Bus Master,
and Ultra DMA 33/66/100/133 modes. The IDE RAID connectors allow you to
connect Ultra ATA/DMA hard disks and use RAID technology (RAID 0 strip-
ing or RAID 1 mirroring) for high performance, data security and fault tolerance.
ATA133 RAID Connectors
- You can connect a Master drive to each IDE RAID connector.
-
The two connectors support
hard disk drives
only.
- For more information on ATA133 RAID, please refer to
ATA133 RAID 0 or
1 Quick User’s Guide
.
TIP:
If you install two hard disks on cable, you must configure the
second drive to Slave mode by setting its jumper. Refer to the
hard disk documentation supplied by hard disk vendors for jumper
setting instructions.
In
te
l
8
4
5
c
h
ip
s
e
t
IDE 3
IDE 4
