Intel® Server Board SE7520AF2 TPS
Functional Architecture
Revision 1.2
63
Intel order number C77866-003
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. If the Intel RAID Activation Key or RAID DIMM is not present, the system boots on
SCSI mode (LSI Logic* 53C1030) and the IOP ROMB option in system BIOS will be grayed out.
In both cases, the system BIOS automatically configures and programs the IOP332.
Note:
LSI Logic* Integrated Striping/Mirroring and the integrated Intel
®
RAID Controller
SROMBU42E are mutually exclusive solutions. Only one of the two may be used at a time. A
RAID array (using one or more drives) transfer from one mode to the other is not supported.
For additional details on the integrated Intel® RAID Controller SROMBU42E solution, see
Chapter 4.
3.4.4.1
RAID Memory Subsystem
The Intel® Server Board SE7520AF2 includes a DDR DIMM socket (Slot 2 in the PCI slot area).
This DIMM is not shared with main memory and is for exclusive use as RAID cache for ROMB
functionality. The ROMB subsystem supports one 128 MB, 256 MB or 512 MB DDR333 un-
buffered ECC DIMM, enabling higher performance operation (write back cache). For enhanced
data protection and maximum performance, the ROMB functionality on the Intel® Server Board
SE7520AF2 supports the Intel
®
Portable Cache Module accessory, which provides up to 72
hours of battery back-up. The Intel Portable Cache Module accessory is shown below.
Figure 13. Intel® Portable Cache Module
3.4.5
Parallel ATA (PATA) Support
The Intel® Server Board SE7520AF2 uses one of the integrated IDE controllers of the ICH5-R
to provide one parallel ATA channel via a 40-pin IDE connector on the board. It supports up to
two drives. The ATA channel can be enabled/disabled and configured in the BIOS Setup Utility.
3.4.5.1
Ultra ATA/100
The IDE interfaces of the ICH5R DMA protocol redefine signals on the IDE cable to allow both
host and target throttling of data and transfer rates of up to 100 MB/s.
3.4.6
Serial ATA (SATA) Support
The Intel® Server Board SE7520AF2 uses the integrated Serial ATA (SATA) controller of the
ICH5-R to provide two SATA ports on the baseboard. The SATA ports can be enabled/disabled
and/or configured in legacy mode by accessing the BIOS Setup Utility during POST.