HEADS UP: major CAM ATA MFC

[Ollivier Robert]

According to Alexander Motin:
> Feedbacks are welcome as always.

Working fine from here, on a recent Dell T3500 with ICH8/ICH10 controllers (ATA/AHCI).
Thanks a lot!

Disks were renamed from ad{4,6,8} into ada{0,1,2}. I'm using a full-GPT-ZFS
setup here. ZFS mounted all pools w/o any issue and seems to be using the
gptids instead of the /dev/adNp3 partitions.  Swap is not on ZFS but I
added GPT labels with gpart and glabel added the /dev/gpt entries so swap
is fine too.

See below:

ahci0: <Intel ICH10 AHCI SATA controller> port
0xfe00-0xfe07,0xfe10-0xfe13,0xfe20-0xfe27,0xfe30-0xfe33,0xfec0-0xfedf mem
0xff970000-0xff9707ff irq 20 at device 31.2 on pci0
ahci0: [ITHREAD]
ahci0: AHCI v1.20 with 6 3Gbps ports, Port Multiplier not supported
ahcich0: <AHCI channel> at channel 0 on ahci0
ahcich0: [ITHREAD]
ahcich1: <AHCI channel> at channel 1 on ahci0
ahcich1: [ITHREAD]
ahcich2: <AHCI channel> at channel 2 on ahci0
ahcich2: [ITHREAD]
ahcich3: <AHCI channel> at channel 3 on ahci0
ahcich3: [ITHREAD]
ahcich4: <AHCI channel> at channel 4 on ahci0
ahcich4: [ITHREAD]
ahcich5: <AHCI channel> at channel 5 on ahci0
ahcich5: [ITHREAD]
...
(aprobe0:ahcich0:0:0:0): SIGNATURE: 0000
(aprobe1:ahcich1:0:0:0): SIGNATURE: 0000
(aprobe2:ahcich2:0:0:0): SIGNATURE: 0000
(aprobe3:ahcich3:0:0:0): SIGNATURE: eb14
ada0 at ahcich0 bus 0 scbus0 target 0 lun 0
ada0: <ST3320418AS CC44> ATA/ATAPI-8 SATA 2.x device
ada0: 300.000MB/s transfers
ada0: Command Queueing enabled
ada0: 305245MB (625142448 512 byte sectors: 16H 63S/T 16383C)
cd0 at ahcich3 bus 0 scbus3 target 0 lun 0
cd0: <PLDS DVD-ROM DH-16D5S VD15> Removable CD-ROM SCSI-0 device 
cd0: 150.000MB/s transfers
cd0: Attempt to query device size failed: NOT READY, Medium not present -
tray closed

ada1 at ahcich1 bus 0 scbus1 target 0 lun 0
ada1: <ST3320418AS CC44> ATA/ATAPI-8 SATA 2.x device
ada1: 300.000MB/s transfers
ada1: Command Queueing enabled
ada1: 305245MB (625142448 512 byte sectors: 16H 63S/T 16383C)
ada2 at ahcich2 bus 0 scbus2 target 0 lun 0
ada2: <ST3320418AS CC44> ATA/ATAPI-8 SATA 2.x device
ada2: 300.000MB/s transfers
ada2: Command Queueing enabled
ada2: 305245MB (625142448 512 byte sectors: 16H 63S/T 16383C)

411 [0:31] roberto at ng:~> swapinfo
Device          1K-blocks     Used    Avail Capacity
/dev/gpt/swap0    4194304        0  4194304     0%
/dev/gpt/swap1    4194304        0  4194304     0%
/dev/gpt/swap2    4194304        0  4194304     0%
Total            12582912        0 12582912     0%