ahci hangs on Supermicro MicroCloud second channel

[Dmitry Morozovsky]

Dear colleagues,

I've start testing SuperMicro MicroCloud[1] to have high-density routers 
cluster, and experiencing strange effects with disk subsystem:

- on stable/8, it does detect AHCI controller, but detects disks as non-ahci 
ad*
- on stable/9, disks are shown as ada*, but disk on second channel has constant 
read/write hangs, showing 100% load on few hundreds kBps in gstat.

disk controller is Intel C204 PCH:

ahci0: <Intel Cougar Point AHCI SATA controller> port 
0xf050-0xf057,0xf040-0xf043,0xf030-0xf037,0xf020-0xf023,0xf000-0xf01f mem 
0xfa901000-0xfa9017ff irq 19 at device 31.2 on pci0
ahci0: attempting to allocate 1 MSI vectors (1 supported)
msi: routing MSI IRQ 284 to local APIC 0 vector 81
ahci0: using IRQ 284 for MSI
ahci0: AHCI v1.30 with 6 6Gbps ports, Port Multiplier not supported
ahci0: Caps: 64bit NCQ SNTF ALP AL CLO 6Gbps PMD SSC PSC 32cmd EM 6ports
ahci0: Caps2: APST
ahci0: EM Caps: ALHD XMT SMB LED
ahcich0: <AHCI channel> at channel 0 on ahci0
ahcich0: Caps:
ahcich1: <AHCI channel> at channel 1 on ahci0
ahcich1: Caps:

pass0 at ahcich0 bus 0 scbus0 target 0 lun 0
pass0: <WDC WD5000AAKX-001CA0 15.01H15> ATA-8 SATA 3.x device
pass0: Serial Number WD-WCAYUFH26175
pass0: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 8192bytes)
pass0: Command Queueing enabled
pass1 at ahcich1 bus 0 scbus1 target 0 lun 0
pass1: <WDC WD5000AAKX-001CA0 15.01H15> ATA-8 SATA 3.x device
pass1: Serial Number WD-WCAYUFH32290
pass1: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 8192bytes)
pass1: Command Queueing enabled
ada0 at ahcich0 bus 0 scbus0 target 0 lun 0
ada0: <WDC WD5000AAKX-001CA0 15.01H15> ATA-8 SATA 3.x device
ada0: Serial Number WD-WCAYUFH26175
ada0: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 8192bytes)
ada0: Command Queueing enabled
ada0: 476940MB (976773168 512 byte sectors: 16H 63S/T 16383C)
ada0: Previously was known as ad4
ada1 at ahcich1 bus 0 scbus1 target 0 lun 0
GEOM: new disk ada0
GEOM: new disk ada1
ada1: <WDC WD5000AAKX-001CA0 15.01H15> ATA-8 SATA 3.x device
ada1: Serial Number WD-WCAYUFH32290
ada1: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 8192bytes)
ada1: Command Queueing enabled
ada1: 476940MB (976773168 512 byte sectors: 16H 63S/T 16383C)
ada1: Previously was known as ad6

Any hints?


[1] http://www.supermicro.nl/products/system/3U/5037/SYS-5037MC-H8TRF.cfm

-- 
Sincerely,
D.Marck                                     [DM5020, MCK-RIPE, DM3-RIPN]
[ FreeBSD committer:                                 marck at FreeBSD.org ]
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*** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck at rinet.ru ***
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