Hi All on the list, I have some problem with a dual Intel Xeon HT with Fedora 5 x86_64 the system reports the log below: sd 0:0:0:0: rejecting I/O to offline device sd 0:0:0:0: rejecting I/O to offline device sd 0:0:0:0: rejecting I/O to offline device sd 0:0:0:0: rejecting I/O to offline device sd 0:0:0:0: rejecting I/O to offline device sd 0:0:0:0: rejecting I/O to offline device sd 0:0:0:0: rejecting I/O to offline device the problem is that two identical box have the same problem. The boxes have 4Gb of ECC memory each. The board is an ASUS NCT-D with two Xeon HT 3,2GHz 2Mb cache. I've checked: the memory with memcheck and each SATA hdd (4 each box) with the controller checking utility but none of those have any problem so far. I guess there's some problem on the linux driver and/or by the handling of the data in the DAC 64bit mode from the controller itself. Does anyone have some tips? Thanks in advance. uname -a reports Linux server 2.6.16-1.2122_FC5 #1 SMP Sun May 21 15:01:10 EDT 2006 x86_64 x86_64 x86_64 GNU/Linux The controller is an Adaptec SATA 2420SA below is relevant part of the boot log: Adaptec aacraid driver (1.1-4 May 21 2006 15:27:29) ACPI: PCI Interrupt 0000:04:02.0[A] -> GSI 27 (level, low) -> IRQ 18 AAC0: kernel 5.1-0[8373] AAC0: monitor 5.1-0[8373] AAC0: bios 5.1-0[8373] AAC0: serial 4fe049 AAC0: 64bit support enabled. AAC0: 64 Bit DAC enabled scsi0 : aacraid Vendor: Adaptec Model: Main Rev: V1.0 Type: Direct-Access ANSI SCSI revision: 02 SCSI device sda: 1757157376 512-byte hdwr sectors (899665 MB) sda: assuming Write Enabled sda: assuming drive cache: write through SCSI device sda: 1757157376 512-byte hdwr sectors (899665 MB) sda: assuming Write Enabled sda: assuming drive cache: write through sda: sda1 sda2 sda3 sd 0:0:0:0: Attached scsi removable disk sda lspci -v reports 00:00.0 Host bridge: Intel Corporation E7525 Memory Controller Hub (rev 0c) Subsystem: ASUSTeK Computer Inc. Unknown device 814a Flags: bus master, fast devsel, latency 0 Capabilities: [40] Vendor Specific Information 00:00.1 Class ff00: Intel Corporation E7525/E7520 Error Reporting Registers (rev 0c) Subsystem: ASUSTeK Computer Inc. Unknown device 814a Flags: fast devsel 00:02.0 PCI bridge: Intel Corporation E7525/E7520/E7320 PCI Express Port A (rev 0c) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=01, subordinate=01, sec-latency=0 I/O behind bridge: 0000a000-0000afff Capabilities: [50] Power Management version 2 Capabilities: [58] Message Signalled Interrupts: 64bit- Queue=0/1 Enable- Capabilities: [64] Express Root Port (Slot-) IRQ 0 Capabilities: [100] Advanced Error Reporting 00:03.0 PCI bridge: Intel Corporation E7525/E7520/E7320 PCI Express Port A1 (rev 0c) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=02, subordinate=02, sec-latency=0 I/O behind bridge: 0000b000-0000bfff Memory behind bridge: d7a00000-d7afffff Capabilities: [50] Power Management version 2 Capabilities: [58] Message Signalled Interrupts: 64bit- Queue=0/1 Enable- Capabilities: [64] Express Root Port (Slot-) IRQ 0 Capabilities: [100] Advanced Error Reporting 00:04.0 PCI bridge: Intel Corporation E7525/E7520 PCI Express Port B (rev 0c) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=03, subordinate=03, sec-latency=0 I/O behind bridge: 0000c000-0000cfff Memory behind bridge: d7b00000-d7bfffff Prefetchable memory behind bridge: 00000000d8000000-00000000dff00000 Capabilities: [50] Power Management version 2 Capabilities: [58] Message Signalled Interrupts: 64bit- Queue=0/1 Enable- Capabilities: [64] Express Root Port (Slot-) IRQ 0 Capabilities: [100] Advanced Error Reporting 00:1c.0 PCI bridge: Intel Corporation 6300ESB 64-bit PCI-X Bridge (rev 02) (prog-if 00 [Normal decode]) Flags: bus master, 66MHz, fast devsel, latency 64 Bus: primary=00, secondary=04, subordinate=04, sec-latency=64 I/O behind bridge: 0000d000-0000dfff Memory behind bridge: d7c00000-d7efffff Capabilities: [50] PCI-X bridge device 00:1d.0 USB Controller: Intel Corporation 6300ESB USB Universal Host Controller (rev 02) (prog-if 00 [UHCI]) Subsystem: ASUSTeK Computer Inc. Unknown device 8117 Flags: bus master, medium devsel, latency 0, IRQ 16 I/O ports at 9880 [size=32] 00:1d.1 USB Controller: Intel Corporation 6300ESB USB Universal Host Controller (rev 02) (prog-if 00 [UHCI]) Subsystem: ASUSTeK Computer Inc. Unknown device 8117 Flags: bus master, medium devsel, latency 0, IRQ 21 I/O ports at 9c00 [size=32] 00:1d.4 System peripheral: Intel Corporation 6300ESB Watchdog Timer (rev 02) Subsystem: ASUSTeK Computer Inc. Unknown device 8117 Flags: medium devsel Memory at d79ff800 (32-bit, non-prefetchable) [size=16] 00:1d.5 PIC: Intel Corporation 6300ESB I/O Advanced Programmable Interrupt Controller (rev 02) (prog-if 20 [IO(X)-APIC]) Subsystem: ASUSTeK Computer Inc. Unknown device 8117 Flags: bus master, fast devsel, latency 0 Capabilities: [50] PCI-X non-bridge device 00:1d.7 USB Controller: Intel Corporation 6300ESB USB2 Enhanced Host Controller (rev 02) (prog-if 20 [EHCI]) Subsystem: ASUSTeK Computer Inc. Unknown device 8117 Flags: bus master, medium devsel, latency 0, IRQ 19 Memory at d79ffc00 (32-bit, non-prefetchable) [size=1K] Capabilities: [50] Power Management version 2 Capabilities: [58] Debug port 00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 0a) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=05, subordinate=05, sec-latency=32 I/O behind bridge: 0000e000-0000efff Memory behind bridge: d7f00000-d7ffffff Prefetchable memory behind bridge: c2000000-c20fffff 00:1f.0 ISA bridge: Intel Corporation 6300ESB LPC Interface Controller (rev 02) Flags: bus master, medium devsel, latency 0 00:1f.1 IDE interface: Intel Corporation 6300ESB PATA Storage Controller (rev 02) (prog-if 8a [Master SecP PriP]) Subsystem: ASUSTeK Computer Inc. Unknown device 8117 Flags: bus master, medium devsel, latency 0, IRQ 17 I/O ports at <unassigned> I/O ports at <unassigned> I/O ports at <unassigned> I/O ports at <unassigned> I/O ports at fc00 [size=16] Memory at c2100000 (32-bit, non-prefetchable) [size=1K] 00:1f.3 SMBus: Intel Corporation 6300ESB SMBus Controller (rev 02) Subsystem: ASUSTeK Computer Inc. Unknown device 8117 Flags: medium devsel, IRQ 5 I/O ports at 0400 [size=32] 00:1f.5 Multimedia audio controller: Intel Corporation 6300ESB AC'97 Audio Controller (rev 02) Subsystem: ASUSTeK Computer Inc. Unknown device 80b0 Flags: bus master, medium devsel, latency 0, IRQ 24 I/O ports at 9400 [size=256] I/O ports at 9800 [size=64] Memory at d79ff400 (32-bit, non-prefetchable) [size=512] Memory at d79ff000 (32-bit, non-prefetchable) [size=256] Capabilities: [50] Power Management version 2 02:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5751 Gigabit Ethernet PCI Express (rev 11) Subsystem: ASUSTeK Computer Inc. Unknown device 814b Flags: bus master, fast devsel, latency 0, IRQ 16 Memory at d7af0000 (64-bit, non-prefetchable) [size=64K] Capabilities: [48] Power Management version 2 Capabilities: [50] Vital Product Data Capabilities: [58] Message Signalled Interrupts: 64bit+ Queue=0/3 Enable- Capabilities: [d0] Express Endpoint IRQ 0 Capabilities: [100] Advanced Error Reporting Capabilities: [13c] Virtual Channel 03:00.0 VGA compatible controller: ATI Technologies Inc RV370 5B60 [Radeon X300 (PCIE)] (prog-if 00 [VGA]) Subsystem: ASUSTeK Computer Inc. Unknown device 0082 Flags: bus master, fast devsel, latency 0, IRQ 11 Memory at d8000000 (32-bit, prefetchable) [size=128M] I/O ports at c000 [size=256] Memory at d7be0000 (32-bit, non-prefetchable) [size=64K] Expansion ROM at d7bc0000 [disabled] [size=128K] Capabilities: [50] Power Management version 2 Capabilities: [58] Express Endpoint IRQ 0 Capabilities: [80] Message Signalled Interrupts: 64bit+ Queue=0/0 Enable- Capabilities: [100] Advanced Error Reporting 03:00.1 Display controller: ATI Technologies Inc RV370 [Radeon X300SE] Subsystem: ASUSTeK Computer Inc. Unknown device 0083 Flags: bus master, fast devsel, latency 0 Memory at d7bf0000 (32-bit, non-prefetchable) [size=64K] Capabilities: [50] Power Management version 2 Capabilities: [58] Express Endpoint IRQ 0 04:02.0 RAID bus controller: Adaptec AAC-RAID (Rocket) (rev 02) Subsystem: Adaptec ASR-2420SA Flags: bus master, 66MHz, medium devsel, latency 64, IRQ 18 Memory at d7c00000 (64-bit, non-prefetchable) [size=2M] Memory at d7eff000 (64-bit, non-prefetchable) [size=4K] Expansion ROM at d7ee0000 [disabled] [size=32K] Capabilities: [40] Power Management version 2 Capabilities: [48] Message Signalled Interrupts: 64bit+ Queue=0/2 Enable- Capabilities: [58] PCI-X non-bridge device Capabilities: [60] Vital Product Data 05:01.0 Ethernet controller: 3Com Corporation 3c940 10/100/1000Base-T [Marvell] (rev 10) Subsystem: 3Com Corporation 3C941 Gigabit LOM Ethernet Adapter Flags: bus master, 66MHz, medium devsel, latency 64, IRQ 22 Memory at d7ffc000 (32-bit, non-prefetchable) [size=16K] I/O ports at e800 [size=256] Expansion ROM at c2000000 [disabled] [size=128K] Capabilities: [48] Power Management version 2 Capabilities: [50] Vital Product Data 05:02.0 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 61) (prog-if 00 [UHCI]) Subsystem: ASUSTeK Computer Inc. Unknown device 814c Flags: bus master, medium devsel, latency 64, IRQ 22 I/O ports at e480 [size=32] Capabilities: [80] Power Management version 2 05:02.1 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 61) (prog-if 00 [UHCI]) Subsystem: ASUSTeK Computer Inc. Unknown device 814c Flags: bus master, medium devsel, latency 64, IRQ 23 I/O ports at ec00 [size=32] Capabilities: [80] Power Management version 2 05:02.2 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 63) (prog-if 20 [EHCI]) Subsystem: ASUSTeK Computer Inc. Unknown device 814c Flags: bus master, medium devsel, latency 64, IRQ 20 Memory at d7ffbc00 (32-bit, non-prefetchable) [size=256] Capabilities: [80] Power Management version 2 05:03.0 FireWire (IEEE 1394): Texas Instruments TSB43AB22/A IEEE-1394a-2000 Controller (PHY/Link) (prog-if 10 [OHCI]) Subsystem: ASUSTeK Computer Inc. K8N4-E Mainboard Flags: bus master, medium devsel, latency 64, IRQ 23 Memory at d7ffb000 (32-bit, non-prefetchable) [size=2K] Memory at d7ff4000 (32-bit, non-prefetchable) [size=16K] Capabilities: [44] Power Management version 2 Roberto Fichera.