which drive is what?

[knasbas]

Im just wondering what the easy way would be solve this.
I got 6 hdds in my box and 5 of them contains data. In the beginning of installation i get the following:

Cool! Let's get to it.

You will now initialize the disk(s) that OpenBSD will use. To enable all
available security features you should configure the disk(s) to allow the
creation of separate filesystems for /, /tmp, /var, /usr, and /home.

Available disks are: wd0 wd1 wd2 wd3 wd4 wd5
Which one is the root disk? (or done) [done]

Isnt there a simple way to "list/see" what the disks contains?

[jggimi]

Sure.

Step 1 is to "!" to escape to a shell.

An optional Step 2 is to examine your dmesg, which will give you make/model information about the drives; this may indicate physical differences between the drives. Obviously, this won't help if all five are identical hardware. e.g.:

#dmesg | grep wd

Step 3 is to use fdisk(8) to see the MBR partitions assigned to each drive, e.g.:

# fdisk wd0
# fdisk wd1
.
.

If you actually need to mount any of these foreign partitions while running the ramdisk kernel, which you are using for the install, it will depend on the particular filesystem type as well as the specific architecture of your OpenBSD machine -- capabilities of the ramdisk kernel vary by architecture.

[knasbas]

oh.. i forgot to thank you for this exact and great answer!