ahci(4) doesn't work with Hitachi 3TB drive

[Alexander Motin]

Dieter BSD wrote:
> FreeBSD 8.2 amd64
> ahci(4) and siis(4) were updated 2011-05-15.
> <JMicron JMB363 UDMA133 controller>
> <SiI3132 SATA controller>
> <Port Multiplier 37261095 1706>
> 
> Connected a shiny new Hitachi 3 TB disk to JMB363 (no PM):
> 
> ada11 at ahcich1 bus 0 scbus5 target 0 lun 0
> ada11: <Hitachi HDS5C3030ALA630 MEAOA580> ATA-8 SATA 3.x device
> ada11: 150.000MB/s transfers (SATA 1.x, UDMA6, PIO 8192bytes)
> ada11: Command Queueing enabled
> ada11: 2861588MB (5860533168 512 byte sectors: 16H 63S/T 16383C)
> 
> Should connect at 300 MB/s but says 150.
> 
> smartctl is not happy:
> 
> /dev/ada11: Unable to detect device type
> Smartctl: please specify device type with the -d option.
> Use smartctl -h to get a usage summary
> 
> Attempt to read disk with dd does not work.
> 
> ahcich1: Timeout on slot 0
> ahcich1: is 00000000 cs 00000000 ss 00000001 rs 00000001 tfd 50 serr 00000000
> ahcich1: Timeout on slot 0
> ahcich1: is 00000000 cs 00000000 ss 00000001 rs 00000001 tfd 50 serr 00000000
> ...
> 
> kill -9 dd process, wait for ahci to eventually give up,
> unplug disk from JMB363, plug disk into 3132 controller via 3726 PM
> 
> (ada11:ahcich1:0:0:0): lost device
> (ada11:ahcich1:0:0:0): removing device entry
> siisch3: SNTF 0x8000
> siisch3: siis_wait_ready() calling DELAY(1000)
> ada11 at siisch3 bus 0 scbus3 target 2 lun 0
> ada11: <Hitachi HDS5C3030ALA630 MEAOA580> ATA-8 SATA 3.x device
> ada11: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
> ada11: Command Queueing enabled
> ada11: 2861588MB (5860533168 512 byte sectors: 16H 63S/T 16383C)
> 
> Siis talks to it at 300 MB/s, smartctl works, and dd is reading from it.
> 
> Ahci talks to Hitachi 2 TB okay, not sure what is different with 3 TB.

Is the 2TB disk is also SATA3? It looks like some link misnegotiation.
You may try to manually limit JMicron's port to SATA1 to simplify
negotiation and see what happen.

-- 
Alexander Motin