From owner-freebsd-stable@FreeBSD.ORG  Fri Aug  4 11:17:12 2006
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Date: Fri, 04 Aug 2006 14:17:08 +0300
From: "Ville Sulin" <grs@salaisuus.fi>
To: freebsd-stable@freebsd.org
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Subject: freebsd 6.x and 3ware 9500S-8 in 32bit pci slot
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Hi,

I have a smallish problem, got a backup server with ASUS PC-DL motherboard that doesn't have a 64 bit pci slot
and a 3ware 9500S-8 card. The machine resets the controller every now and then, but when there's enough disk
io when it tries to do that the machine crashes.

console warnings:

twa0: INFO: (0x04: 0x000c): : unit=0
twa0: ERROR: (0x05: 0x210b): Request timed out!: request = 0xc64fb1f0
twa0: INFO: (0x16: 0x1108): Resetting controller...:
twa0: INFO: (0x04: 0x0001): : SoftResetCount=1
twa0: INFO: (0x16: 0x1107): Controller reset done!:
twa0: INFO: (0x04: 0x000c): : unit=0

lspci -vv :

03:0b.0 RAID bus controller: 3ware Inc 9xxx-series SATA-RAID
        Subsystem: 3ware Inc 9xxx-series SATA-RAID
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
        Status: Cap+ 66MHz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
        Latency: 32 (2250ns min), Cache Line Size 08
        Interrupt: pin A routed to IRQ 23
        Region 0: I/O ports at b000
        Region 1: Memory at fb800000 (64-bit, non-prefetchable)
        Region 3: Memory at fb000000 (64-bit, prefetchable)
        Capabilities: [40] PCI-X non-bridge device
                Command: DPERE- ERO- RBC=512 OST=1
                Status: Dev=ff:1f.0 64bit+ 133MHz+ SCD- USC- DC=simple DMMRBC=512 DMOST=1 DMCRS=8 RSCEM- 266MHz- 533MHz-
        Capabilities: [48] Power Management version 2
                Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-

And on the risk of sounding stupid, doesn't this "64bit+" mean that freebsd is using it "with 64 bit" support?
And if it indeed does, is there any way to force it off?

If there isn't a simple solution, were just getting a motherboard with 64bit pci slot.

Thanks
-Ville