Date: 07-11-06 18:14
We have an Adaptec 3210S (ADAP3210S) running with FreeBSD/i386 6.1-RELEASE with a similar error from raidutil:
root@schabell:~# raidutil -L all
Engine connect failed: COMPATILITY number
osdIOrequest : File /dev/rdptr17 Could Not Be Opened
After searching and trying around for a few hours (including creating links in /dev), we saw the comment about ASR_COMPAT kernel option in the webcvs source archive for asr.c  (Revision 220.127.116.11).
So we just added the "options ASR_COMPAT" to our kernel config, rebuilded and installed the kernel and did the reboot. Then the raidutil from the sysutils/asr-utils Ports just works, without playing around with the shared memory stuff.