Comfortable dd bs= parameters for different media

[Polytropon]

Hi,

I'd like to ask which sizes are comfortable to use for reading
from different media using the dd utility. As far as I know,
these are good values:

	Format		Device (example)	bs=
	-------------	---------------------	----
	Data CD		/dev/acd0		2048
	Music CD	/dev/acd0t01		2352
	DVD		/dev/acd0		2048 (?)
	Hard disk	/dev/ad0s1g		1m (?)

The usual command is

	% dd if=/dev/see-above of=somefile.dd bs=whatever

What about copying partition-wise from a hard disk to a dd file?
Which bs= parameter would be encouraged to use?



-- 
Polytropon
>From Magdeburg, Germany
Happy FreeBSD user since 4.0
Andra moi ennepe, Mousa, ...