[Bug 246279] ciss device driver not allowing more than 48 drives to be detected by the CAM layer

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=246279

--- Comment #24 from Peter Eriksson <pen@lysator.liu.se> ---
Result on the bigger server: 

Booted, but then I got a long list of CAM errors ending with a "ADAPTER
HEARTBEAT FAILED".

...
(da116:ciss2:32:56:0): CAM status: CCB request completed with an error
(da116:ciss2:32:56:0): Retrying command, 3 more tries remain
(da123:ciss2:32:63:0): READ(6). CDB: 08 00 01 40 08 00 
(da123:ciss2:32:63:0): CAM status: CCB request completed with an error
(da123:ciss2:32:63:0): Retrying command, 3 more tries remain
(da123:ciss2:32:63:0): READ(10). CDB: 28 00 00 00 03 00 00 01 00 00 
(da123:ciss2:32:63:0): CAM status: CCB request completed with an error
(da123:ciss2:32:63:0): Retrying command, 2 more tries remain
(da123:ciss2:32:63:0): READ(6). CDB: 08 00 01 38 08 00 
(da123:ciss2:32:63:0): CAM status: CCB request completed with an error
(da123:ciss2:32:63:0): Retrying command, 3 more tries remain
(da123:ciss2:32:63:0): READ(6). CDB: 08 00 01 30 08 00 
(da123:ciss2:32:63:0): CAM status: CCB request completed with an error
(da123:ciss2:32:63:0): Retrying command, 3 more tries remain
(da116:ciss2:32:56:0): READ(16). CDB: 88 00 00 00 00 01 ce 8c 30 28 00 00 01 00
00 00 
(da116:ciss2:32:56:0): CAM status: CCB request completed with an error
(da116:ciss2:32:56:0): Retrying command, 3 more tries remain
(da116:ciss2:32:56:0): READ(16). CDB: 88 00 00 00 00 01 ce 8c 31 28 00 00 01 00
00 00 
(da116:ciss2:32:56:0): CAM status: CCB request completed with an error
(da116:ciss2:32:56:0): Retrying command, 3 more tries remain
(da116:ciss2:32:56:0): READ(16). CDB: 88 00 00 00 00 01 ce 8c 32 28 00 00 01 00
00 00 
(da116:ciss2:32:56:0): CAM status: CCB request completed with an error
(da116:ciss2:32:56:0): Retrying command, 3 more tries remain
(da116:ciss2:32:56:0): READ(16). CDB: 88 00 00 00 00 01 ce 8c 33 28 00 00 00 38
00 00 
(da116:ciss2:32:56:0): CAM status: CCB request completed with an error
(da116:ciss2:32:56:0): Retrying command, 3 more tries remain
ciss2: ADAPTER HEARTBEAT FAILED

(I could login and see all disks with "camcontrol delvist" but it started
displaying these errors when zfs was importing the pools. 

The da116 and da123 diskar are probably bad but it would be nice if the ciss
controller would handle bad drives a bit better in general.

I had to replace the HP H241 controller with an LSI SAS3816 controller on my
other "big" HP server since that H241/ciss controller would go into a loop and
just spew out retry errors every day or so. The LSI controller handles the bad
drives better...

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