ata/ahci problems in 9.0-BETA3

Hi!

I have the following problem on 2 different machines with the same 
version of FreeBSD on it (csup'd yesterday)

Whenever I compile some stuff or transfer bigger amounts of data there 
is a chance that I'l get the following error:

ahcich0: AHCI reset: device not ready after 31000ms (tfd = 00000080)
ahcich0: Timeout on slot 28 port 0
achich0: is 00000000 cs 10000000 ss 00000000 rs 10000000 tfd 80 serr 
00000000 cmd 0000fc17
(this error is from machine 2)

It never recovers after that problem and the only solution is to turn 
off the power (reset is not sufficient - it looks like the sata 
controller is completely dead after such an occurence)

I had the same problem in earlier versions of head (9-current) on 
machine 1 without the SSD but was able to work around them by not using 
ahci - that workaround no longer works - only difference is that it says 
"ataX:" instead of "ahcichX:" in the above error.

Machine 2 started with the problems when I put the SSD into it.

I even tried the "NO_NCQ" 'switch' which I found somewhere on the net 
for a similar problem.

Both BIOS' are up to date and Windows runs stable on machine 2 (which 
means I do not expect it to be a hardware problem)

What can I do to trace and get rid of that problem?

(a "bt" in the system debugger didn't really show me much useful 
information - at least not useful to me...)

Cheers,
Armin


machine 1:
ahci0: <JMicron JMB363 AHCI SATA controller> mem 0xfbcfe000-0xfbcfffff 
irq 16 at device 0.0 on pci4
ahci0: AHCI v1.00 with 2 3Gbps ports, Port Multiplier supported
ahcich0: <AHCI channel> at channel 0 on ahci0
ahcich1: <AHCI channel> at channel 1 on ahci0
ahci1: <Intel ICH10 AHCI SATA controller> port 
0x9c00-0x9c07,0x9880-0x9883,0x9800-0x9807,0x9480-0x9483,0x9400-0x941f 
mem 0xf7ffc000-0xf7ffc7ff irq 20 at device 31.2 on pci0
ahci1: AHCI v1.20 with 6 3Gbps ports, Port Multiplier supported
ahcich2: <AHCI channel> at channel 0 on ahci1
ahcich3: <AHCI channel> at channel 1 on ahci1
ahcich4: <AHCI channel> at channel 2 on ahci1
ahcich5: <AHCI channel> at channel 3 on ahci1
ahcich6: <AHCI channel> at channel 4 on ahci1
ahcich7: <AHCI channel> at channel 5 on ahci1
ada0 at ahcich2 bus 0 scbus4 target 0 lun 0
ada0: <Corsair Force 3 SSD 1.3> ATA-8 SATA 3.x device
ada0: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
ada0: Command Queueing enabled
ada0: 114473MB (234441648 512 byte sectors: 16H 63S/T 16383C)
ada0: Previously was known as ad10
ada1 at ahcich3 bus 0 scbus5 target 0 lun 0
ada1: <SAMSUNG HD154UI 1AG01118> ATA-7 SATA 2.x device
ada1: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
ada1: Command Queueing enabled
ada1: 1430799MB (2930277168 512 byte sectors: 16H 63S/T 16383C)
ada1: Previously was known as ad12
ada2 at ahcich4 bus 0 scbus6 target 0 lun 0
ada2: <SAMSUNG HD154UI 1AG01118> ATA-7 SATA 2.x device
ada2: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
ada2: Command Queueing enabled
ada2: 1430799MB (2930277168 512 byte sectors: 16H 63S/T 16383C)
ada2: Previously was known as ad14

machine 2:
ahci0: <Intel 5 Series/3400 Series AHCI SATA controller> port 
0x5058-0x505f,0x5084-0x5087,0x5050-0x5057,0x5080-0x5083,0x5020-0x503f 
mem 0xb7806000-0xb78067ff irq 19 at device 31.2 on pci0
ahci0: AHCI v1.30 with 6 3Gbps ports, Port Multiplier not supported
ahcich0: <AHCI channel> at channel 0 on ahci0
ada0 at ahcich0 bus 0 scbus0 target 0 lun 0
ada0: <Corsair Force 3 SSD 1.3> ATA-8 SATA 3.x device
ada0: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
ada0: Command Queueing enabled
ada0: 114473MB (234441648 512 byte sectors: 16H 63S/T 16383C)
ada0: Previously was known as ad4