Supermicro SBI-7426T-SH, User Manual

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5-7
Chapter 5: BIOS
Block
(Multi-Sector
Transfer)
Block mode boosts 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 the data to be transferred from and to the device one
sector at a time. Select “Auto” to allows the data transfer from and to the device
occur multiple sectors at a time if the device supports it. The options are
Auto
and D
ISABLED
.
PIO Mode
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 BIOS to auto detect
the PIO mode. Use this value if the IDE disk drive support cannot be determined.
Select 0 to allow BIOS to use PIO mode 0, which has a data transfer rate of 3.3
MBs. Select 1 to allow BIOS to use PIO mode 1, which has a data transfer rate of
5.2 MBs. Select 2 to allow BIOS to use PIO mode 2, which has a data transfer
rate of 8.3 MBs. Select 3 to allow BIOS to use PIO mode 3, which has a data
transfer rate of 11.1 MBs. Select 4 to allow BIOS to use PIO mode 4, which has a
data transfer rate of 16.6 MBs. This setting generally works with all hard disk
drives manufactured after 1999. For other disk drives, such as IDE CD-ROM
drives, check the specifications of the drive.
DMA Mode Selects the DMA Mode. The only option is Auto
S.M.A.R.T.
Self-Monitoring Analysis and Reporting Technology (SMART) can help predict
impending drive failures. Select “Auto” to allow BIOS to auto detect hard disk
drive support. Select “Disabled” to prevent AMI BIOS from using the S.M.A.R.T.
Select “Enabled” to allow AMI BIOS to use the S.M.A.R.T. to support hard drive
disk. The options are D
ISABLED
, E
NABLED
, and Auto .
32-bit Data
Transfer Select “Enabled” to activate the function of 32-Bit data transfer. Select “Disabled”
to deactivate the function. The options are
Enabled and D
ISABLED
.
Hard Disk Write
Protect This setting enables/disables device write protection and is effective only if the
device is accessed through BIOS. The default is
Disabled .
IDE Detect Tie Out
(Sec) This setting allows you to select the time out value for detecting ATA?ATAPI
devices. Press
+ or - on your keyboard to change this value. The default is 35 .
ATA(PI) 80Pin Cable
Detection This setting allows you to select the mechanism for detecting 80P in ATA(PI)
cable to either H
OST
, D
EVICE
or Host & Device .
Table 5-5. PCIPnP Configuration Sub-menu
Menu Option Description
Clear NVRAM
This setting allows you to clear NVRAM during a system boot. The options are
No and Y
ES
.
Plug & Play O/S
Selecting Y
ES
allows the OS to configure Plug & Play devices. Select No to allow
the AMI BIOS to configure all devices in your system.
NOTE: This is not required for system boot (select No ) if your system has an OS
that supports Plug & Play.
PCI Latency Timer
This sets the latency timer of each PCI device installed on a PCI bus. For
example, select
64 to set the PCI latency to 64 PCI clock cycles. The options are
32, 64 , 96, 128, 160, 192, 224 an 248.
Table 5-4. IDE Configuration Menu (Continued)
Menu Option Description