Acer Aspire M5640 - Manual (Page 40)

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Parameter Description Options
IDE HDD Block
Mode Block mode is also called block transfer, multiple
commands, or multiple sectors read/write. If your IDE
hard drive supports block mode(most new drives do),
select Enabled for automatic detection of the optimal
number of block read/write per sector the drive can
support. [Enabled],
[Disabled]
SATA PORT
Speed Settings This category allows you to determine the speed of
SATA port. [Auto],
Integrated Peripherals-Onboard Device
Setup