When presenting Solaris disks to Sybase as a raw device, it's not possible to use the whole disk (s2), or Sybase will try to overwrite the disk label (
disk init will not succeed). Therefore, you need to first edit the partitioning. One way is to bump the predefined slice 6 (usr) by one cylinder in format:
d XX p 6 [..] Enter new starting cyl: 1 label y
You can then proceed to create a metadevice for the disk (on a SAN LUN you would normally create a plain concat) and present /dev/md/rdsk/dXX to Sybase. To avoid downtime next time you need to migrate your LUN to another SAN, a tip is to always wrap concat devices as submirrors of a one way mirror. More on this in another post.