Acnodes RMC 7155 - Manual (Page 54)

RMC 7155
14” short depth server
54
© Copyright 2011 Acnodes, Inc.
All rights reserved. Product description and product specifications
are subject to change without notice. For latest product information,
please visit Acnodes’ web site at www.acnodes.com. 14628 Central Blvd,
Chino, CA91710
tel:909.597.7588, fax:909.597.1939
Block (Multi-Sector Transfer)
Block Mode boosts the IDE drive performance by increasing the amount of data transferred. Only 512 bytes of data can be
transferred per interrupt if Block Mode is not used. Block Mode allows transfers of up to 64 KB per interrupt. Select Disabled to
allow data to be transferred from and to the device one sector at a time. Select Auto to allow data transfer from and to the
device occur multiple sectors at a time if the device supports it. The options are Auto and Disabled.
PIO Mode
The IDE PIO (Programmable I/O) Mode programs timing cycles between the IDE drive and the programmable IDE controller. As
the PIO mode increases, the cycle time decreases. The options are Auto, 0, 1, 2, 3, and 4.
Select Auto to allow the AMI BIOS to automatically detect the PIO mode. Use this value if the IDE disk drive support cannot be
determined.
Select 0 to allow the AMI BIOS to use PIO mode 0. It has a data transfer rate of 3.3 MBs.
Select 1 to allow the AMI BIOS to use PIO mode 1. It has a data transfer rate of 5.2 MBs.
Select 2 to allow the AMI BIOS to use PIO mode 2. It has a data transfer rate of 8.3 MBs.
Select 3 to allow the AMI BIOS to use PIO mode 3. It has a data transfer rate of 11.1 MBs.
Select 4 to allow the AMI BIOS to use PIO mode 4. It has a data transfer band- width of 32-Bits. Select Enabled to enable 32-
Bit data transfer.
DMA Mode
Select Auto to allow the BIOS to automatically detect IDE DMA mode when the
IDE disk drive support cannot be determined.
Select SW DMA0 to allow the BIOS to use Single W ord DMA mode 0. It has a data transfer rate of 2.1 MBs.
Select SW DMA1 to allow the BIOS to use Single W ord DMA mode 1. It has a data transfer rate of 4.2 MBs.
Select SW DMA2 to allow the BIOS to use Single W ord DMA mode 2. It has a data transfer rate of 8.3 MBs.
Select MW DMA0 to allow the BIOS to use Multi W ord DMA mode 0. It has a data transfer rate of 4.2 MBs.
Select MW DMA1 to allow the BIOS to use Multi W ord DMA mode 1. It has a data transfer rate of 13.3 MBs.
Select MW DMA2 to allow the BIOS to use Multi-W ord DMA mode 2. It has a data transfer rate of 16.6 MBs.
Select UDMA0 to allow the BIOS to use Ultra DMA mode 0. It has a data transfer rate of 16.6 MBs. It has the same transfer
rate as PIO mode 4 and Multi W ord DMA mode 2.
Select UDMA1 to allow the BIOS to use Ultra DMA mode 1. It has a data transfer rate of 25 MBs.
Select UDMA2 to allow the BIOS to use Ultra DMA mode 2. It has a data transfer rate of 33.3 MBs.
Select UDMA3 to allow the BIOS to use Ultra DMA mode 3. It has a data transfer rate of 66.6 MBs.
Select UDMA4 to allow the BIOS to use Ultra DMA mode 4. It has a data transfer rate of 100 MBs.
Select UDMA5 to allow the BIOS to use Ultra DMA mode 5. It has a data transfer rate of 133 MBs.