this is my grub menu.lst
(hd1,0)=boot for Arch.
(hd1,2)=root for Arch.
(hd1,3)=(debian) note yet.
Can I just just use part hdb4 or will better if i create a boot partion and root partion for debian in order to to have a better grub entry for it.
A single partition should be fine. You don't need a separate boot partition.
You might have to shift some partitions around to make room for Debian. You can only have 4 primary parititions, so you'll have to create an Extended one and stick a couple in there.
thanks for your quickly answer.
In this this case my Hdb will
hdb1, hdb2,hdb3 (primary for ARch)
hdb4 will and extended.
Apeiro, Is it in this extended partition where do I've create boot and root for Debian?
Yes, you can put them there.
The tricky part is that you've already got four (primary) partitions, so you need to delete one of them to replace it with an extended partition... Not very fun.
If you can afford the time/effort, you might want to wipe out all partitions but the Windows one and re-partition the drive with extended ones (or combine Arch's root and /boot parts into one, so each distro only takes a single partition).
Apeiro, I am sorry if I confuse you.
this is my layout
hdb4 = empty
is in this hdb4 that I try to install another distro but I do not know if this combination can affect my Arch systen. would you tell me