Samsung SSD 840 PRO fails to probe

[Adam McDougall]

Hello,

My co-worker ordered a Samsung 840 PRO series SSD for his desktop but we 
found 9.0-rel would not probe it and 9.1-rc3 shows some errors.  I got 
past the problem with a workaround of disabling AHCI mode in the BIOS 
which drops it to IDE mode and it detects fine, although runs a little 
slower.  Is there something I can try to make it probe properly in AHCI 
mode?  We also tried moving it to the SATA data and power cables from 
the working SATA HD so I don't think it is the port or controller 
driver.  The same model motherboard from another computer did the same 
thing.  Thanks.

dmesg line when it is working:
ada0: <Samsung SSD 840 PRO Series DXM03B0Q> ATA-9 SATA 3.x device

dmesg lines when it is not working: (hand transcribed from a picture)
(aprobe0:ahcich0:0:0): SETFEATURES ENABLE SATA FEATURE. ACB: ef 10 00 00 
00 40 00 00 00 00 05 00
(aprobe0:ahcich0:0:0): CAM status: ATA Status Error
(aprobe0:ahcich0:0:0): ATA status: 51 (DRDY SERV ERR), error: 04 (ABRT )
(aprobe0:ahcich0:0:0): RES: 51 04 00 00 00 40 00 00 00 00 00
(aprobe0:ahcich0:0:0): Retrying command
(aprobe0:ahcich0:0:0): SETFEATURES ENABLE SATA FEATURE. ACB: ef 10 00 00 
00 40 00 00 00 00 05 00
(aprobe0:ahcich0:0:0): CAM status: ATA Status Error
(aprobe0:ahcich0:0:0): ATA status: 51 (DRDY SERV ERR), error: 04 (ABRT )
(aprobe0:ahcich0:0:0): RES: 51 04 00 00 00 40 00 00 00 00 00
(aprobe0:ahcich0:0:0): Error 5, Retries exhausted