Rmc 7182 – Acnodes RMC 7182 User Manual
Page 83
661 Brea Canyon Rd., Suite 3
Walnut, CA 91789
tel: 909.598.7388, fax: 909.598.0218
© Copyright 2009 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.
RMC 7182
1U Rackmount System
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 sup-
port cannot be determined.
Select SWDMA0 to allow the BIOS to use Single Word DMA mode 0. It has a data transfer rate of
2.1 MBs.
Select SWDMA1 to allow the BIOS to use Single Word DMA mode 1. It has a data transfer rate of
4.2 MBs.
Select SWDMA2 to allow the BIOS to use Single Word DMA mode 2. It has a data transfer rate of
8.3 MBs.
Select MWDMA0 to allow the BIOS to use Multi Word DMA mode 0. It has a data transfer rate of 4.2
MBs.
Select MWDMA1 to allow the BIOS to use Multi Word DMA mode 1. It has a data transfer rate of
13.3 MBs.