what does /dev/sdf look like?

[randall <randall@songshu.org>]

dear all,

a silly question here, but i'm just going through the disaster recovery 
procedure....and what to do in case of harddisk failure.

i have a nice raid setup, and its no problem to recognize which  
/dev/sdX has dropped out of the array, but how do you physically 
identify for example /dev/sdf when opening the box and have 6 disks to 
choose from?

i can't be the first with this question so i just wonder what "rules of 
thumb" others use.

thanks for reading this anyway.

randall