HDD Detection time

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what

I know that hdd detection times are different by mainboards(or chipset?).
Anyone knows where i can find these information?
 
"what" said:
I know that hdd detection times are different by mainboards(or chipset?).
Anyone knows where i can find these information?
Click to expand...

In some BIOS setup screens, there is an option to set the
time. The maximum time on these boards is 35 seconds, but
can be set by the user.

As an example, see PDF page 81 here:
ftp://ftp.asus.com.tw/pub/ASUS/mb/sock478/P4C800E-DX/e1347b_p4c800-e_deluxe.pdf

When using onboard RAID controllers, the time constant is
buried inside the RAID BIOS, and the user has no control
over the setting.

There are also some delays in the BIOS POST program that
we do not understand. On some BIOS, there is a 10 to 20
second delay _after_ disk detection is complete, and we cannot
tell what is going on during that time.

If you wish to study this issue, the best way to do your study
is to find a POST card (port 80 monitor), as the card
will display numbers as it advances through the BIOS
routines. Here is a sample BIOS POST card for port 80 (PCI):

http://costronic.com/Ev05p.htm

HDD detection time is something you cannot shorten, without
running the risk of declaring a disk dead, when in fact it
has not finished spinning up. The trick is, to find out what
is the slowest disk in the industry, and use that disk to
set the time constant.

Paul
 
what said:
I know that hdd detection times are different by mainboards(or chipset?).
Anyone knows where i can find these information?
Click to expand...

New motherboard technology allows the boot process to move very rapidly,
forcing IDE hard disks to be initialized earlier in the boot process. Older
IDE hard disks may not spin up in time to be detected. Newer IDE hard disks
spin up in a very short time and should have no problem with a setting of
zero.
You can start with a setting of zero for the shortest boot up time. If all
drives are detected then you've found the correct setting. If some drives
are not, then, increase the delay. A system may boot fine with one or more
drives undetected.

My present system with the P4C800E-D, an IDE WD 120 and two SATA Hitachi 80
RAID 1 boot fine with a setting of zero.
 
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