I have never seen this but I am very interested in this particular
instance.  Apparently there is an issue with read ahead on mfi that I
have never seen before on OpenBSD but other OS' have run into.

Is this reproducible?  If so can you try to disable read ahead in
CTRL-R (bios)?

Thanks,
/marco

On Mon, Feb 12, 2007 at 11:31:26AM -0500, Alejandro Lozanoff wrote:
> Sorry for the message without body, im a little sleepy and hitted the
> wrong button... :p
> 
> Ok,
> 
> I had this problem last night on one of our shiny Dell PowerEdge 2950s
> with RAID 10 and SAS disks.
> For no reason it started screaming "sd0: not queued: error 5" on the
> console, the  server didnt crash (no core, no trace) but was in an
> unresponsive state, i couldnt log on or anything. I was wondering if
> this error could be a hardware problem (RAID card maybe?).
> The logs dont show anything notorious, there were no heavy IO at the
> time of the problem. I'm kind of clueless at what could have been the
> problem, a quick search showed some old messages with SCSI cards
> problems only.
> 
> This is 4.0 Stable as shown below.
> 
> dmesg follows:
> 
> OpenBSD 4.0-stable (GENERIC) #1: Mon Nov 27 16:23:49 GMT 2006
>     [EMAIL PROTECTED]:/usr/src/sys/arch/i386/compile/GENERIC
> cpu0: Intel(R) Xeon(TM) CPU 3.00GHz ("GenuineIntel" 686-class) 3 GHz
> cpu0:
> FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUS
> H,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,SBF,SSE3,MWAIT,DS-CPL,VMX,EST,CNXT-ID,C
> X16
> cpu0: Enhanced SpeedStep disabled by BIOS
> real mem  = 1072955392 (1047808K)
> avail mem = 970735616 (947984K)
> using 4256 buffers containing 53751808 bytes (52492K) of memory
> mainbus0 (root)
> bios0 at mainbus0: AT/286+(00) BIOS, date 06/21/06, BIOS32 rev. 0 @
> 0xffe90, SMBIOS rev. 2.4 @ 0x3ffbc000 (62 entries)
> bios0: Dell Inc. PowerEdge 2950
> pcibios0 at bios0: rev 2.1 @ 0xf0000/0x10000
> pcibios0: PCI IRQ Routing Table rev 1.0 @ 0xfade0/384 (22 entries)
> pcibios0: PCI Interrupt Router at 000:31:0 ("Intel 6321ESB LPC" rev 0x00)
> pcibios0: PCI bus #16 is the last bus
> bios0: ROM list: 0xc0000/0x9000! 0xc9000/0x1000 0xca000/0x1800
> 0xcb800/0x5200 0xec000/0x4000!
> ipmi0 at mainbus0: version 2.0 interface KCS iobase 0xca8/8 spacing 4
> cpu0 at mainbus0
> pci0 at mainbus0 bus 0: configuration mode 1 (no bios)
> pchb0 at pci0 dev 0 function 0 "Intel 5000X Host" rev 0x12
> ppb0 at pci0 dev 2 function 0 "Intel 5000 PCIE" rev 0x12
> pci1 at ppb0 bus 6
> ppb1 at pci1 dev 0 function 0 "Intel 6321ESB PCIE" rev 0x01
> pci2 at ppb1 bus 7
> ppb2 at pci2 dev 0 function 0 "Intel 6321ESB PCIE" rev 0x01
> pci3 at ppb2 bus 8
> ppb3 at pci3 dev 0 function 0 "ServerWorks PCIE-PCIX" rev 0xc2
> pci4 at ppb3 bus 9
> bnx0 at pci4 dev 0 function 0 "Broadcom BCM5708" rev 0x11: irq 5,
> address 00:18:8b:72:c0:fd
> brgphy0 at bnx0 phy 1: BCM5708C 10/100/1000baseT PHY, rev. 5
> ppb4 at pci2 dev 1 function 0 "Intel 6321ESB PCIE" rev 0x01
> pci5 at ppb4 bus 10
> ppb5 at pci1 dev 0 function 3 "Intel 6321ESB PCIE-PCIX" rev 0x01
> pci6 at ppb5 bus 11
> ppb6 at pci0 dev 3 function 0 "Intel 5000 PCIE" rev 0x12
> pci7 at ppb6 bus 1
> ppb7 at pci7 dev 0 function 0 "Intel IOP333 PCIE-PCIX" rev 0x00
> pci8 at ppb7 bus 2
> mfi0 at pci8 dev 14 function 0 "Dell PERC 5" rev 0x00: irq 6
> mfi0: logical drives 1, version 5.0.1-0030, 256MB RAM
> scsibus0 at mfi0: 1 targets
> sd0 at scsibus0 targ 0 lun 0: <DELL, PERC 5/i, 1.00> SCSI3 0/direct fixed
> sd0: 278784MB, 278784 cyl, 64 head, 32 sec, 512 bytes/sec, 570949632 sec
> total
> ppb8 at pci7 dev 0 function 2 "Intel IOP333 PCIE-PCIX" rev 0x00
> pci9 at ppb8 bus 3
> ppb9 at pci0 dev 4 function 0 "Intel 5000 PCIE" rev 0x12
> pci10 at ppb9 bus 12
> ppb10 at pci0 dev 5 function 0 "Intel 5000 PCIE" rev 0x12
> pci11 at ppb10 bus 13
> ppb11 at pci0 dev 6 function 0 "Intel 5000 PCIE" rev 0x12
> pci12 at ppb11 bus 14
> ppb12 at pci0 dev 7 function 0 "Intel 5000 PCIE" rev 0x12
> pci13 at ppb12 bus 15
> pchb1 at pci0 dev 16 function 0 "Intel 5000 Error Reporting" rev 0x12
> pchb2 at pci0 dev 16 function 1 "Intel 5000 Error Reporting" rev 0x12
> pchb3 at pci0 dev 16 function 2 "Intel 5000 Error Reporting" rev 0x12
> pchb4 at pci0 dev 17 function 0 "Intel 5000 Reserved" rev 0x12
> pchb5 at pci0 dev 19 function 0 "Intel 5000 Reserved" rev 0x12
> pchb6 at pci0 dev 21 function 0 "Intel 5000 FBD" rev 0x12
> pchb7 at pci0 dev 22 function 0 "Intel 5000 FBD" rev 0x12
> ppb13 at pci0 dev 28 function 0 "Intel 6321ESB PCIE" rev 0x09
> pci14 at ppb13 bus 4
> ppb14 at pci14 dev 0 function 0 "ServerWorks PCIE-PCIX" rev 0xc2
> pci15 at ppb14 bus 5
> bnx1 at pci15 dev 0 function 0 "Broadcom BCM5708" rev 0x11: irq 5,
> address 00:18:8b:72:c0:fb
> brgphy1 at bnx1 phy 1: BCM5708C 10/100/1000baseT PHY, rev. 5
> uhci0 at pci0 dev 29 function 0 "Intel 6321ESB USB" rev 0x09: irq 11
> usb0 at uhci0: USB revision 1.0
> uhub0 at usb0
> uhub0: Intel UHCI root hub, rev 1.00/1.00, addr 1
> uhub0: 2 ports with 2 removable, self powered
> uhci1 at pci0 dev 29 function 1 "Intel 6321ESB USB" rev 0x09: irq 10
> usb1 at uhci1: USB revision 1.0
> uhub1 at usb1
> uhub1: Intel UHCI root hub, rev 1.00/1.00, addr 1
> uhub1: 2 ports with 2 removable, self powered
> uhci2 at pci0 dev 29 function 2 "Intel 6321ESB USB" rev 0x09: irq 11
> usb2 at uhci2: USB revision 1.0
> uhub2 at usb2
> uhub2: Intel UHCI root hub, rev 1.00/1.00, addr 1
> uhub2: 2 ports with 2 removable, self powered
> ehci0 at pci0 dev 29 function 7 "Intel 6321ESB USB" rev 0x09: irq 11
> usb3 at ehci0: USB revision 2.0
> uhub3 at usb3
> uhub3: Intel EHCI root hub, rev 2.00/1.00, addr 1
> uhub3: 6 ports with 6 removable, self powered
> ppb15 at pci0 dev 30 function 0 "Intel 82801BA AGP" rev 0xd9
> pci16 at ppb15 bus 16
> vga1 at pci16 dev 13 function 0 "ATI ES1000" rev 0x02
> wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation)
> wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
> ichpcib0 at pci0 dev 31 function 0 "Intel 6321ESB LPC" rev 0x09: PM disabled
> pciide0 at pci0 dev 31 function 1 "Intel 6321ESB IDE" rev 0x09: DMA,
> channel 0 configured to compatibility, channel 1 configured to
> compatibility
> atapiscsi0 at pciide0 channel 0 drive 0
> scsibus1 at atapiscsi0: 2 targets
> cd0 at scsibus1 targ 0 lun 0: <HL-DT-ST, CD-ROM GCR-8240N, 1.10> SCSI0
> 5/cdrom removable
> cd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 2
> pciide0: channel 1 ignored (disabled)
> isa0 at ichpcib0
> isadma0 at isa0
> pckbc0 at isa0 port 0x60/5
> pckbd0 at pckbc0 (kbd slot)
> pckbc0: using irq 1 for kbd slot
> wskbd0 at pckbd0: console keyboard, using wsdisplay0
> pcppi0 at isa0 port 0x61
> midi0 at pcppi0: <PC speaker>
> spkr0 at pcppi0
> npx0 at isa0 port 0xf0/16: reported by CPUID; using exception 16
> pccom0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
> pccom1 at isa0 port 0x2f8/8 irq 3: ns16550a, 16 byte fifo
> biomask ffc5 netmask ffe5 ttymask ffe7
> pctr: user-level cycle counter enabled
> uhub4 at uhub3 port 5
> uhub4: Cypress Semiconductor USB2 Hub, rev 2.00/0.0b, addr 2
> uhub4: 4 ports with 4 removable, self powered, multiple transaction
> translators
> uhidev0 at uhub1 port 1 configuration 1 interface 0
> uhidev0: CHESEN PS2 to USB Converter, rev 1.10/0.10, addr 2, iclass 3/1
> ukbd0 at uhidev0: 8 modifier keys, 6 key codes
> wskbd1 at ukbd0 mux 1
> wskbd1: connecting to wsdisplay0
> uhidev1 at uhub1 port 1 configuration 1 interface 1
> uhidev1: CHESEN PS2 to USB Converter, rev 1.10/0.10, addr 2, iclass 3/1
> uhidev1: 3 report ids
> ums0 at uhidev1 reportid 1: 5 buttons and Z dir.
> wsmouse0 at ums0 mux 0
> uhid0 at uhidev1 reportid 2: input=1, output=0, feature=0
> uhid1 at uhidev1 reportid 3: input=3, output=0, feature=0
> dkcsum: sd0 matches BIOS drive 0x80
> root on sd0a
> rootdev=0x400 rrootdev=0xd00 rawdev=0xd02
> WARNING: / was not properly unmounted

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