HD settings hell....

[jimmyboy]

I have a A1200T with powerflyer, powerflyer and 3.1 roms. Ive been trying to get a hard drive to install properly for a while now. But the hd settings in hdtoolbox keeps screwing me around. Its a hitachi DK23DA-40F drive with 40.01gb. When i get WB3.1 to read the drives setup it tells me the drive is 8gb. If i use 3.9 its tells me 37.2gb or 8gb again.

the drive has a few settings printed on it

cy 16383
h 16
s 63

OS3.9 reads this when its 37.2gb

cylinders 43605
heads 7
blocks per track 256
blocks per cylinder 1792
bytes per block 512
total blocks 781 40160

what is the right setting ?? I have searched the forums for info and tried using a small install partion then sort the rest out. I admit im a bit of a n00b on setting up amiga hds be gentle........ where am i going wrong? idiot/n00b guide would be apreciated please... :-)

[DamageX]

If you multiply 16383*16*63*512 you get almost 8GB so those settings are wrong. Multiply 43605*7*256*512 and you get about 40 billion bytes so those are probably correct.

[Thomas]

If a manufacturer tells you that his drive has a capacity of 40GB, he means that the drive has 40 billion bytes. HDToolbox calculates with "real" GB and 40 billion bytes are 37.2 real GB.

For a manufacturer a GB is 1000*1000*1000 bytes and for HDToolbox a GB is 1024*1024*1024 bytes (1,073,741,824).

Bye,
Thomas