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Re: [Xen-users] Xen 3.3.1 Windows HVM Disk I/O -> domU and dom0 hangs

Hi Philipp,
This seems to be is turning more into a Dell/RAID issue than a Xen issue so if it turns out to be more of a Dell issue, we should probably take this offline the xen-users list and you can just e-mail me directly.
"Degraded" is better than "Offline". It looks like you have six Seagate 500GB ES.2 SAS drives on your PERC6/i setup in RAID-10/RAID-01, etc (judging from the approximately 1.5TB physical volume). The RAID controller is rebuilding the array which is a good thing so don't reboot, etc. until it gets to 100% on the rebuild or if it's stuck at 30%, wait for Dell to get back to you. If it's still stuck at 30%, then something has gone horribly wrong.
Assuming your BBU for the PERC6/i card is good, "write-back" is good so leave that be. Your "read policy" is set to none and that'll cause issues to what you've described. It happened with me with a batch of PowerEdge 1950 III's I received from Dell a while back.
After you get your array back into a "Ready" or "Online" status, change the read policy to something like "Adaptive Read Ahead" as a starting point. Sometimes, Dell sets the read policy to "Adaptive Read Ahead" or similar straight from the factory. Sometimes... they don't and they're shipped turned off if you ask them to configure the array for your from the factory.
You're driver looks fine. So in a nutshell, get the array out of "Degraded" status, turn on "Adaptive Read Ahead" and go from there. You can tweak the read ahead later to whatever suits your needs on the PERC6/i. 

--
Daniel Kao
Übermind, Inc.
Seattle, WA, U.S.A.


Philipp Schmid wrote:

Hi,

we are using the stock xen 2.6.18 kernel (build form the xen sources).
Are there others drivers than in the stock kernel ones available?

I think this is the relevant dmsg output for the raid controller:


scsi0 : LSI Logic SAS based MegaRAID driver

SCSI device sda: 2927099904 512-byte hdwr sectors (1498675 MB)
sda: Write Protect is off
sda: Mode Sense: 1f 00 00 08
SCSI device sda: drive cache: write back
SCSI device sda: 2927099904 512-byte hdwr sectors (1498675 MB)
sda: Write Protect is off
sda: Mode Sense: 1f 00 00 08
SCSI device sda: drive cache: write back
 sda: sda1 sda2
sd 0:2:0:0: Attached scsi disk sda
But what conserns me now is that on all our servers, I just found out that the state of our array says "degraded" and "30% rebuild rate". I just opened a support ticket with dell about this, but has anyone an idea what this could be? 

Regards,

    Philipp



omreport output:


xen26:~# omreport storage controller
 Controller  PERC 6/i Integrated (Embedded)

Controllers
ID                                : 0
Status                            : Non-Critical
Name                              : PERC 6/i Integrated
Slot ID                           : Embedded
State                             : Degraded
Firmware Version                  : 6.0.3-0002
Minimum Required Firmware Version : Not Applicable
Driver Version                    : 00.00.03.01
Minimum Required Driver Version   : 00.00.03.13
Number of Connectors              : 2
Rebuild Rate                      : 30%
BGI Rate                          : 30%
Check Consistency Rate            : 30%
Reconstruct Rate                  : 30%
Alarm State                       : Not Applicable
Cluster Mode                      : Not Applicable
SCSI Initiator ID                 : Not Applicable
Cache Memory Size                 : 256 MB
Patrol Read Mode                  : Auto
Patrol Read State                 : Stopped
Patrol Read Rate                  : 30%
Patrol Read Iterations            : 16

xen26:~# omreport storage vdisk controller=0
List of Virtual Disks on Controller PERC 6/i Integrated (Embedded)

Controller PERC 6/i Integrated (Embedded)
ID                  : 0
Status              : Ok
Name                : Virtual Disk 0
State               : Ready
Progress            : Not Applicable
Layout              : RAID-10
Size                : 1,395.75 GB (1498675150848 bytes)
Device Name         : /dev/sda
Type                : SAS
Read Policy         : No Read Ahead
Write Policy        : Write Back
Cache Policy        : Not Applicable
Stripe Element Size : 64 KB
Disk Cache Policy   : Disabled




complete dmesg output:


Bootdata ok (command line is root=/dev/mapper/domU-root ro console=tty0)
Linux version 2.6.18.8netmonic-xen0-1.0 (root@xxxxxxxxxxxxxxxxxxxxxx) (gcc version 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)) #1 SMP Thu Apr 10 00:13:37 CEST 2008 
BIOS-provided physical RAM map:
 Xen: 0000000000000000 - 00000003e9433000 (usable)
DMI 2.5 present.
On node 0 totalpages: 4045101
  DMA zone: 4040 pages, LIFO batch:0
  DMA32 zone: 1030200 pages, LIFO batch:31
  Normal zone: 3010861 pages, LIFO batch:31
ACPI: RSDP (v002 DELL ) @ 0x00000000000f2190 ACPI: XSDT (v001 DELL PE_SC3 0x00000001 DELL 0x00000001) @ 0x00000000000f222c ACPI: FADT (v003 DELL PE_SC3 0x00000001 DELL 0x00000001) @ 0x00000000bfb83524 ACPI: MADT (v001 DELL PE_SC3 0x00000001 DELL 0x00000001) @ 0x00000000bfb83078 ACPI: SPCR (v001 DELL PE_SC3 0x00000001 DELL 0x00000001) @ 0x00000000bfb83130 ACPI: HPET (v001 DELL PE_SC3 0x00000001 DELL 0x00000001) @ 0x00000000bfb83184 ACPI: MCFG (v001 DELL PE_SC3 0x00000001 DELL 0x00000001) @ 0x00000000bfb831c0 ACPI: WD__ (v001 DELL PE_SC3 0x00000001 DELL 0x00000001) @ 0x00000000bfb83200 ACPI: SLIC (v001 DELL PE_SC3 0x00000001 DELL 0x00000001) @ 0x00000000bfb83338 ACPI: ERST (v001 DELL PE_SC3 0x00000001 DELL 0x00000001) @ 0x00000000bfb6ab18 ACPI: HEST (v001 DELL PE_SC3 0x00000001 DELL 0x00000001) @ 0x00000000bfb6ad28 ACPI: BERT (v001 DELL PE_SC3 0x00000001 DELL 0x00000001) @ 0x00000000bfb6a998 ACPI: EINJ (v001 DELL PE_SC3 0x00000001 DELL 0x00000001) @ 0x00000000bfb6a9c8 ACPI: TCPA (v001 DELL PE_SC3 0x00000001 DELL 0x00000001) @ 0x00000000bfb834bc ACPI: DSDT (v001 DELL PE_SC3 0x00000001 INTL 0x20050624) @ 0x0000000000000000 
ACPI: Local APIC address 0xfee00000
ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled)
ACPI: LAPIC (acpi_id[0x02] lapic_id[0x04] enabled)
ACPI: LAPIC (acpi_id[0x03] lapic_id[0x02] enabled)
ACPI: LAPIC (acpi_id[0x04] lapic_id[0x06] enabled)
ACPI: LAPIC (acpi_id[0x05] lapic_id[0x01] enabled)
ACPI: LAPIC (acpi_id[0x06] lapic_id[0x05] enabled)
ACPI: LAPIC (acpi_id[0x07] lapic_id[0x03] enabled)
ACPI: LAPIC (acpi_id[0x08] lapic_id[0x07] enabled)
ACPI: LAPIC_NMI (acpi_id[0xff] high edge lint[0x1])
ACPI: IOAPIC (id[0x08] address[0xfec00000] gsi_base[0])
IOAPIC[0]: apic_id 8, version 32, address 0xfec00000, GSI 0-23
ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
ACPI: IRQ0 used by override.
ACPI: IRQ2 used by override.
ACPI: IRQ9 used by override.
Setting APIC routing to xen
Using ACPI (MADT) for SMP configuration information
Allocating PCI resources starting at c2000000 (gap: c0000000:20000000)
Built 1 zonelists.  Total pages: 4045101
Kernel command line: root=/dev/mapper/domU-root ro console=tty0
Initializing CPU#0
PID hash table entries: 4096 (order: 12, 32768 bytes)
Xen reported: 1995.033 MHz processor.
Console: colour VGA+ 80x25
Dentry cache hash table entries: 2097152 (order: 12, 16777216 bytes)
Inode-cache hash table entries: 1048576 (order: 11, 8388608 bytes)
Software IO TLB enabled:
 Aperture:     64 megabytes
 Kernel range: ffff880014d79000 - ffff880018d79000
 Address size: 27 bits
PCI-DMA: Using software bounce buffering for IO (SWIOTLB)
Memory: 15996768k/16404684k available (2380k kernel code, 398812k reserved, 1814k data, 164k init) Calibrating delay using timer specific routine.. 3991.67 BogoMIPS (lpj=7983353) 
Security Framework v1.0.0 initialized
Capability LSM initialized
Mount-cache hash table entries: 256
CPU: L1 I cache: 32K, L1 D cache: 32K
CPU: L2 cache: 6144K
CPU: Physical Processor ID: 0
CPU: Processor Core ID: 0
SMP alternatives: switching to UP code
ACPI: Core revision 20060707
SMP alternatives: switching to SMP code
Initializing CPU#1
Initializing CPU#2
CPU: L1 I cache: 32K, L1 D cache: 32K
CPU: L2 cache: 6144K
CPU: Physical Processor ID: 0
CPU: Processor Core ID: 2
Initializing CPU#3
CPU: L1 I cache: 32K, L1 D cache: 32K
CPU: L2 cache: 6144K
CPU: Physical Processor ID: 1
CPU: Processor Core ID: 2
Initializing CPU#4
CPU: L1 I cache: 32K, L1 D cache: 32K
CPU: L2 cache: 6144K
CPU: Physical Processor ID: 0
CPU: Processor Core ID: 1
Initializing CPU#5
CPU: L1 I cache: 32K, L1 D cache: 32K
CPU: L2 cache: 6144K
CPU: Physical Processor ID: 1
CPU: Processor Core ID: 1
Initializing CPU#6
CPU: L1 I cache: 32K, L1 D cache: 32K
CPU: L2 cache: 6144K
CPU: Physical Processor ID: 0
CPU: Processor Core ID: 3
Brought up 8 CPUs
Initializing CPU#7
CPU: L1 I cache: 32K, L1 D cache: 32K
CPU: L2 cache: 6144K
CPU: Physical Processor ID: 1
CPU: Processor Core ID: 3
CPU: L1 I cache: 32K, L1 D cache: 32K
CPU: L2 cache: 6144K
CPU: Physical Processor ID: 1
CPU: Processor Core ID: 0
migration_cost=12768
checking if image is initramfs... it is
Freeing initrd memory: 12645k freed
NET: Registered protocol family 16
ACPI: bus type pci registered
PCI: Using MMCONFIG at e0000000
ACPI: Interpreter enabled
ACPI: Using IOAPIC for interrupt routing
ACPI: PCI Root Bridge [PCI0] (0000:00)
PCI: Probing PCI hardware (bus 00)
PCI: Ignoring BAR0-3 of IDE controller 0000:00:1f.1
Boot video device is 0000:0e:0d.0
PCI: Transparent bridge - 0000:00:1e.0
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PEX2._PRT]
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PEX2.UPST._PRT]
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PEX2.UPST.DWN1._PRT]
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PEX2.UPST.DWN2._PRT]
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PEX3._PRT]
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PEX3.PE2P._PRT]
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PEX4._PRT]
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PEX6._PRT]
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.SBEX._PRT]
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.COMP._PRT]
ACPI: PCI Interrupt Link [LK00] (IRQs 3 4 *5 6 7 10 11 12)
ACPI: PCI Interrupt Link [LK01] (IRQs 3 4 5 6 7 10 11 12) *0, disabled.
ACPI: PCI Interrupt Link [LK02] (IRQs 3 4 5 6 7 10 11 12) *0, disabled.
ACPI: PCI Interrupt Link [LK03] (IRQs 3 4 5 6 7 10 *11 12)
ACPI: PCI Interrupt Link [LK04] (IRQs 3 4 5 6 7 *10 11 12)
ACPI: PCI Interrupt Link [LK05] (IRQs 3 4 5 6 7 10 *11 12)
ACPI: PCI Interrupt Link [LK06] (IRQs 3 4 5 6 7 10 11 12) *0, disabled.
ACPI: PCI Interrupt Link [LK07] (IRQs 3 4 5 6 7 10 11 12) *0, disabled.
Linux Plug and Play Support v0.97 (c) Adam Belay
pnp: PnP ACPI init
pnp: PnP ACPI: found 12 devices
xen_mem: Initialising balloon driver.
SCSI subsystem initialized
usbcore: registered new driver usbfs
usbcore: registered new driver hub
PCI: Using ACPI for IRQ routing
PCI: If a device doesn't work, try "pci=routeirq". If it helps, post a report 
pnp: 00:08: ioport range 0x800-0x87f could not be reserved
pnp: 00:08: ioport range 0x880-0x8bf has been reserved
pnp: 00:08: ioport range 0x8c0-0x8df has been reserved
pnp: 00:08: ioport range 0x8e0-0x8e3 has been reserved
pnp: 00:08: ioport range 0x900-0x900 has been reserved
pnp: 00:08: ioport range 0xc00-0xc7f has been reserved
pnp: 00:08: ioport range 0xca0-0xca7 has been reserved
pnp: 00:08: ioport range 0xca9-0xcab has been reserved
pnp: 00:09: ioport range 0xca8-0xca8 has been reserved
pnp: 00:09: ioport range 0xcac-0xcac has been reserved
PCI: Bridge: 0000:06:00.0
  IO window: disabled.
  MEM window: f4000000-f7ffffff
  PREFETCH window: disabled.
PCI: Bridge: 0000:05:00.0
  IO window: disabled.
  MEM window: f4000000-f7ffffff
  PREFETCH window: disabled.
PCI: Bridge: 0000:05:01.0
  IO window: disabled.
  MEM window: disabled.
  PREFETCH window: disabled.
PCI: Bridge: 0000:04:00.0
  IO window: disabled.
  MEM window: f4000000-f7ffffff
  PREFETCH window: disabled.
PCI: Bridge: 0000:04:00.3
  IO window: disabled.
  MEM window: disabled.
  PREFETCH window: disabled.
PCI: Bridge: 0000:00:02.0
  IO window: disabled.
  MEM window: f2000000-f7ffffff
  PREFETCH window: disabled.
PCI: Bridge: 0000:00:03.0
  IO window: e000-efff
  MEM window: fc300000-fc4fffff
  PREFETCH window: disabled.
PCI: Bridge: 0000:00:04.0
  IO window: disabled.
  MEM window: disabled.
  PREFETCH window: disabled.
PCI: Bridge: 0000:00:05.0
  IO window: disabled.
  MEM window: disabled.
  PREFETCH window: disabled.
PCI: Bridge: 0000:00:06.0
  IO window: disabled.
  MEM window: disabled.
  PREFETCH window: disabled.
PCI: Bridge: 0000:00:07.0
  IO window: disabled.
  MEM window: disabled.
  PREFETCH window: disabled.
PCI: Bridge: 0000:02:00.0
  IO window: disabled.
  MEM window: f8000000-fbffffff
  PREFETCH window: disabled.
PCI: Bridge: 0000:00:1c.0
  IO window: disabled.
  MEM window: f8000000-fbffffff
  PREFETCH window: disabled.
PCI: Bridge: 0000:00:1e.0
  IO window: d000-dfff
  MEM window: fc100000-fc2fffff
  PREFETCH window: d8000000-dfffffff
GSI 16 sharing vector 0xA0 and IRQ 16
ACPI: PCI Interrupt 0000:00:02.0[A] -> GSI 16 (level, low) -> IRQ 16
PCI: Setting latency timer of device 0000:00:02.0 to 64
ACPI: PCI Interrupt 0000:04:00.0[A] -> GSI 16 (level, low) -> IRQ 16
PCI: Setting latency timer of device 0000:04:00.0 to 64
ACPI: PCI Interrupt 0000:05:00.0[A] -> GSI 16 (level, low) -> IRQ 16
PCI: Setting latency timer of device 0000:05:00.0 to 64
PCI: Setting latency timer of device 0000:06:00.0 to 64
ACPI: PCI Interrupt 0000:05:01.0[A] -> GSI 16 (level, low) -> IRQ 16
PCI: Setting latency timer of device 0000:05:01.0 to 64
PCI: Setting latency timer of device 0000:04:00.3 to 64
ACPI: PCI Interrupt 0000:00:03.0[A] -> GSI 16 (level, low) -> IRQ 16
PCI: Setting latency timer of device 0000:00:03.0 to 64
ACPI: PCI Interrupt 0000:00:04.0[A] -> GSI 16 (level, low) -> IRQ 16
PCI: Setting latency timer of device 0000:00:04.0 to 64
PCI: Setting latency timer of device 0000:00:05.0 to 64
ACPI: PCI Interrupt 0000:00:06.0[A] -> GSI 16 (level, low) -> IRQ 16
PCI: Setting latency timer of device 0000:00:06.0 to 64
PCI: Setting latency timer of device 0000:00:07.0 to 64
ACPI: PCI Interrupt 0000:00:1c.0[A] -> GSI 16 (level, low) -> IRQ 16
PCI: Setting latency timer of device 0000:00:1c.0 to 64
PCI: Setting latency timer of device 0000:02:00.0 to 64
PCI: Setting latency timer of device 0000:00:1e.0 to 64
NET: Registered protocol family 2
IP route cache hash table entries: 524288 (order: 10, 4194304 bytes)
TCP established hash table entries: 262144 (order: 10, 4194304 bytes)
TCP bind hash table entries: 65536 (order: 8, 1048576 bytes)
TCP: Hash tables configured (established 262144 bind 65536)
TCP reno registered
VFS: Disk quotas dquot_6.5.1
Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
Initializing Cryptographic API
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered (default)
PCI: Setting latency timer of device 0000:00:02.0 to 64
assign_interrupt_mode Found MSI capability
Allocate Port Service[0000:00:02.0:pcie00]
Allocate Port Service[0000:00:02.0:pcie01]
PCI: Setting latency timer of device 0000:00:03.0 to 64
assign_interrupt_mode Found MSI capability
Allocate Port Service[0000:00:03.0:pcie00]
Allocate Port Service[0000:00:03.0:pcie01]
PCI: Setting latency timer of device 0000:00:04.0 to 64
assign_interrupt_mode Found MSI capability
Allocate Port Service[0000:00:04.0:pcie00]
Allocate Port Service[0000:00:04.0:pcie01]
PCI: Setting latency timer of device 0000:00:05.0 to 64
pcie_portdrv_probe->Dev[25e5:8086] has invalid IRQ. Check vendor BIOS
assign_interrupt_mode Found MSI capability
Allocate Port Service[0000:00:05.0:pcie00]
Allocate Port Service[0000:00:05.0:pcie01]
PCI: Setting latency timer of device 0000:00:06.0 to 64
assign_interrupt_mode Found MSI capability
Allocate Port Service[0000:00:06.0:pcie00]
Allocate Port Service[0000:00:06.0:pcie01]
PCI: Setting latency timer of device 0000:00:07.0 to 64
pcie_portdrv_probe->Dev[25e7:8086] has invalid IRQ. Check vendor BIOS
assign_interrupt_mode Found MSI capability
Allocate Port Service[0000:00:07.0:pcie00]
Allocate Port Service[0000:00:07.0:pcie01]
PCI: Setting latency timer of device 0000:00:1c.0 to 64
assign_interrupt_mode Found MSI capability
Allocate Port Service[0000:00:1c.0:pcie00]
Allocate Port Service[0000:00:1c.0:pcie03]
PCI: Setting latency timer of device 0000:04:00.0 to 64
Allocate Port Service[0000:04:00.0:pcie10]
Allocate Port Service[0000:04:00.0:pcie11]
PCI: Setting latency timer of device 0000:05:00.0 to 64
assign_interrupt_mode Found MSI capability
Allocate Port Service[0000:05:00.0:pcie20]
Allocate Port Service[0000:05:00.0:pcie21]
PCI: Setting latency timer of device 0000:05:01.0 to 64
assign_interrupt_mode Found MSI capability
Allocate Port Service[0000:05:01.0:pcie20]
Allocate Port Service[0000:05:01.0:pcie21]
ACPI: Power Button (FF) [PWRF]
ACPI: CPU0 (power states: C1[C1] C3[C3])
ACPI: CPU4 (power states: C1[C1] C3[C3])
ACPI: CPU2 (power states: C1[C1] C3[C3])
ACPI: CPU6 (power states: C1[C1] C3[C3])
ACPI: CPU1 (power states: C1[C1] C3[C3])
ACPI: CPU5 (power states: C1[C1] C3[C3])
ACPI: CPU3 (power states: C1[C1] C3[C3])
ACPI: CPU7 (power states: C1[C1] C3[C3])
Real Time Clock Driver v1.12ac
hpet_acpi_add: no address or irqs in _CRS
floppy0: Unable to grab DMA2 for the floppy driver
floppy0: no floppy controllers found
RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize
forcedeth.c: Reverse Engineered nForce ethernet driver. Version 0.56.
PPP generic driver version 2.4.2
Xen virtual console successfully installed as xvc0
Event-channel device installed.
Successfully initialized TPM backend driver.
Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx 
ESB2: IDE controller at PCI slot 0000:00:1f.1
ACPI: PCI Interrupt 0000:00:1f.1[A] -> GSI 16 (level, low) -> IRQ 16
ESB2: chipset revision 9
ESB2: not 100% native mode: will probe irqs later
    ide0: BM-DMA at 0xfc00-0xfc07, BIOS settings: hda:DMA, hdb:pio
Probing IDE interface ide0...
hda: TEAC DVD-ROM DV28EV, ATAPI CD/DVD-ROM drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
Probing IDE interface ide1...
hda: ATAPI 24X DVD-ROM drive, 198kB Cache, UDMA(33)
Uniform CD-ROM driver Revision: 3.20
GSI 17 sharing vector 0xA8 and IRQ 17
ACPI: PCI Interrupt 0000:00:1d.7[A] -> GSI 21 (level, low) -> IRQ 17
PCI: Setting latency timer of device 0000:00:1d.7 to 64
ehci_hcd 0000:00:1d.7: EHCI Host Controller
ehci_hcd 0000:00:1d.7: new USB bus registered, assigned bus number 1
ehci_hcd 0000:00:1d.7: debug port 1
PCI: cache line size of 32 is not supported by device 0000:00:1d.7
ehci_hcd 0000:00:1d.7: irq 17, io mem 0xfc500400
ehci_hcd 0000:00:1d.7: USB 2.0 started, EHCI 1.00, driver 10 Dec 2004
usb usb1: configuration #1 chosen from 1 choice
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 8 ports detected
ohci_hcd: 2005 April 22 USB 1.1 'Open' Host Controller (OHCI) Driver (PCI) 
USB Universal Host Controller Interface driver v3.0
ACPI: PCI Interrupt 0000:00:1d.0[A] -> GSI 21 (level, low) -> IRQ 17
PCI: Setting latency timer of device 0000:00:1d.0 to 64
uhci_hcd 0000:00:1d.0: UHCI Host Controller
uhci_hcd 0000:00:1d.0: new USB bus registered, assigned bus number 2
uhci_hcd 0000:00:1d.0: irq 17, io base 0x0000cce0
usb usb2: configuration #1 chosen from 1 choice
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 2 ports detected
GSI 18 sharing vector 0xB0 and IRQ 18
ACPI: PCI Interrupt 0000:00:1d.1[B] -> GSI 20 (level, low) -> IRQ 18
PCI: Setting latency timer of device 0000:00:1d.1 to 64
uhci_hcd 0000:00:1d.1: UHCI Host Controller
uhci_hcd 0000:00:1d.1: new USB bus registered, assigned bus number 3
uhci_hcd 0000:00:1d.1: irq 18, io base 0x0000ccc0
usb usb3: configuration #1 chosen from 1 choice
hub 3-0:1.0: USB hub found
hub 3-0:1.0: 2 ports detected
ACPI: PCI Interrupt 0000:00:1d.2[C] -> GSI 21 (level, low) -> IRQ 17
PCI: Setting latency timer of device 0000:00:1d.2 to 64
uhci_hcd 0000:00:1d.2: UHCI Host Controller
uhci_hcd 0000:00:1d.2: new USB bus registered, assigned bus number 4
uhci_hcd 0000:00:1d.2: irq 17, io base 0x0000cca0
usb usb4: configuration #1 chosen from 1 choice
hub 4-0:1.0: USB hub found
hub 4-0:1.0: 2 ports detected
usb 1-5: new high speed USB device using ehci_hcd and address 2
ACPI: PCI Interrupt 0000:00:1d.3[D] -> GSI 20 (level, low) -> IRQ 18
PCI: Setting latency timer of device 0000:00:1d.3 to 64
uhci_hcd 0000:00:1d.3: UHCI Host Controller
uhci_hcd 0000:00:1d.3: new USB bus registered, assigned bus number 5
uhci_hcd 0000:00:1d.3: irq 18, io base 0x0000cc80
usb usb5: configuration #1 chosen from 1 choice
hub 5-0:1.0: USB hub found
hub 5-0:1.0: 2 ports detected
usb 1-5: configuration #1 chosen from 1 choice
hub 1-5:1.0: USB hub found
hub 1-5:1.0: 4 ports detected
usbcore: registered new driver usblp
drivers/usb/class/usblp.c: v0.13: USB Printer Device Class driver
Initializing USB Mass Storage driver...
usbcore: registered new driver usb-storage
USB Mass Storage support registered.
usbcore: registered new driver usbhid
drivers/usb/input/hid-core.c: v2.6:USB HID core driver
PNP: No PS/2 controller found. Probing ports directly.
serio: i8042 AUX port at 0x60,0x64 irq 12
serio: i8042 KBD port at 0x60,0x64 irq 1
mice: PS/2 mouse device common for all mice
xenoprofile_init: ret -19, events -12, xenoprof_is_primary 0
oprofile: using timer interrupt.
TCP bic registered
NET: Registered protocol family 1
NET: Registered protocol family 17
ACPI: (supports S0 S4 S5)
Freeing unused kernel memory: 164k freed
megasas: 00.00.03.01 Sun May 14 22:49:52 PDT 2006
megasas: 0x1000:0x0060:0x1028:0x1f0c: bus 1:slot 0:func 0
ACPI: PCI Interrupt 0000:01:00.0[A] -> GSI 16 (level, low) -> IRQ 16
PCI: Setting latency timer of device 0000:01:00.0 to 64
scsi0 : LSI Logic SAS based MegaRAID driver
  Vendor: SEAGATE   Model: ST3500620SS       Rev: MS04
  Type:   Direct-Access                      ANSI SCSI revision: 05
  Vendor: SEAGATE   Model: ST3500620SS       Rev: MS04
  Type:   Direct-Access                      ANSI SCSI revision: 05
  Vendor: SEAGATE   Model: ST3500620SS       Rev: MS04
  Type:   Direct-Access                      ANSI SCSI revision: 05
  Vendor: SEAGATE   Model: ST3500620SS       Rev: MS04
  Type:   Direct-Access                      ANSI SCSI revision: 05
  Vendor: SEAGATE   Model: ST3500620SS       Rev: MS04
  Type:   Direct-Access                      ANSI SCSI revision: 05
  Vendor: SEAGATE   Model: ST3500620SS       Rev: MS04
  Type:   Direct-Access                      ANSI SCSI revision: 05
  Vendor: DP        Model: BACKPLANE         Rev: 1.05
  Type:   Enclosure                          ANSI SCSI revision: 05
  Vendor: DELL      Model: PERC 6/i          Rev: 1.11
  Type:   Direct-Access                      ANSI SCSI revision: 05
Broadcom NetXtreme II Gigabit Ethernet Driver bnx2 v1.4.44 (August 10, 2006) 
ACPI: PCI Interrupt 0000:07:00.0[A] -> GSI 16 (level, low) -> IRQ 16
eth0: Broadcom NetXtreme II BCM5708 1000Base-T (B2) PCI-X 64-bit 133MHz found at mem f4000000, IRQ 16, node addr 00221987c97d 
ACPI: PCI Interrupt 0000:03:00.0[A] -> GSI 16 (level, low) -> IRQ 16
eth1: Broadcom NetXtreme II BCM5708 1000Base-T (B2) PCI-X 64-bit 133MHz found at mem f8000000, IRQ 16, node addr 00221987c97b 
SCSI device sda: 2927099904 512-byte hdwr sectors (1498675 MB)
sda: Write Protect is off
sda: Mode Sense: 1f 00 00 08
SCSI device sda: drive cache: write back
SCSI device sda: 2927099904 512-byte hdwr sectors (1498675 MB)
sda: Write Protect is off
sda: Mode Sense: 1f 00 00 08
SCSI device sda: drive cache: write back
 sda: sda1 sda2
sd 0:2:0:0: Attached scsi disk sda
device-mapper: ioctl: 4.7.0-ioctl (2006-06-24) initialised: dm-devel@xxxxxxxxxx 
Attempting manual resume
kjournald starting.  Commit interval 5 seconds
EXT3-fs: mounted filesystem with ordered data mode.
pci_hotplug: PCI Hot Plug PCI Core version: 0.5
shpchp: Standard Hot Plug PCI Controller Driver version: 0.4
intel_rng: FWH not detected
EXT3 FS on dm-1, internal journal
loop: loaded (max 8 devices)
kjournald starting.  Commit interval 5 seconds
EXT3 FS on sda1, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
Adding 1048568k swap on /dev/mapper/domU-swap. Priority:-1 extents:1 across:1048568k 


On Feb 13, 2009, at 1:15 AM, Daniel Kao wrote:


Philipp Schmid wrote:

Hi,
we are using dell poweredge 2950 servers with a "PERC 6/i Integrated" hardware raid controller. 

Lg Philipp
How are the read-ahead and write-cache settings set on the PERC6/i and which/whose RAID drivers are you using under dom0 (output from dmesg, etc.) 

Cheers,
Daniel






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