Hi, it is nothing really serious, but neverthless strange: When using hdparm -t or dd if=/dev/sda of=/dev/null count=1024000 bs=4096, no matter how long I wait, I only get about 20-22mb/sec transfer. But stoppping above or waiting till it is finished, the second time my old transfer rate comes back: 62mb/sec. What is causing this? I am using libata with siimage and Samsung HD. Prakash le entries: 512 (order: 0, 4096 bytes) checking if image is initramfs...it isn't (ungzip failed); looks like an initrd Freeing initrd memory: 304k freed CPU: After generic identify, caps: 0383fbff c1c3fbff 00000000 00000000 CPU: After vendor identify, caps: 0383fbff c1c3fbff 00000000 00000000 CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line) CPU: L2 Cache: 256K (64 bytes/line) CPU: After all inits, caps: 0383fbff c1c3fbff 00000000 00000020 Intel machine check architecture supported. Intel machine check reporting enabled on CPU#0. CPU: AMD Athlon(tm) stepping 01 Enabling fast FPU save and restore... done. Enabling unmasked SIMD FPU exception support... done. Checking 'hlt' instruction... OK. POSIX conformance testing by UNIFIX enabled ExtINT on CPU#0 ESR value before enabling vector: 00000000 ESR value after enabling vector: 00000000 ENABLING IO-APIC IRQs init IO_APIC IRQs IO-APIC (apicid-pin) 2-0, 2-16, 2-17, 2-18, 2-19, 2-20, 2-21, 2-22, 2-23 not connected. ..TIMER: vector=0x31 pin1=2 pin2=0 ..MP-BIOS bug: 8254 timer not connected to IO-APIC ...trying to set up timer (IRQ0) through the 8259A ... ..... (found pin 0) ...works. Using local APIC timer interrupts. calibrating APIC timer ... ..... CPU clock speed is 2104.0468 MHz. ..... host bus clock speed is 400.0851 MHz. NET: Registered protocol family 16 PCI: Using configuration type 1 mtrr: v2.0 (20020519) ACPI: Subsystem revision 20040116 IOAPIC[0]: Set PCI routing entry (2-9 -> 0x71 -> IRQ 9 Mode:1 Active:0) ACPI: Interpreter enabled ACPI: Using IOAPIC for interrupt routing ACPI: PCI Root Bridge [PCI0] (00:00) PCI: Probing PCI hardware (bus 00) ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.HUB0._PRT] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.AGPB._PRT] ACPI: PCI Interrupt Link [LNK1] (IRQs 3 4 5 6 7 10 11 12 14 15) ACPI: PCI Interrupt Link [LNK2] (IRQs 3 4 5 6 7 10 11 12 14 15) ACPI: PCI Interrupt Link [LNK3] (IRQs 3 4 5 6 7 10 *11 12 14 15) ACPI: PCI Interrupt Link [LNK4] (IRQs 3 4 *5 6 7 10 11 12 14 15) ACPI: PCI Interrupt Link [LNK5] (IRQs 3 4 5 6 7 10 11 12 14 15) ACPI: PCI Interrupt Link [LUBA] (IRQs 3 4 *5 6 7 10 11 12 14 15) ACPI: PCI Interrupt Link [LUBB] (IRQs 3 4 5 6 7 *10 11 12 14 15) ACPI: PCI Interrupt Link [LMAC] (IRQs 3 4 5 6 7 *10 11 12 14 15) ACPI: PCI Interrupt Link [LAPU] (IRQs 3 4 5 6 7 *10 11 12 14 15) ACPI: PCI Interrupt Link [LACI] (IRQs 3 4 5 6 7 10 *11 12 14 15) ACPI: PCI Interrupt Link [LMCI] (IRQs 3 4 5 6 7 10 11 12 14 15) ACPI: PCI Interrupt Link [LSMB] (IRQs 3 4 5 6 7 10 *11 12 14 15) ACPI: PCI Interrupt Link [LUB2] (IRQs 3 4 5 6 7 10 *11 12 14 15) ACPI: PCI Interrupt Link [LFIR] (IRQs 3 4 *5 6 7 10 11 12 14 15) ACPI: PCI Interrupt Link [L3CM] (IRQs 3 4 5 6 7 10 11 12 14 15) ACPI: PCI Interrupt Link [LIDE] (IRQs 3 4 5 6 7 10 11 12 14 15) ACPI: PCI Interrupt Link [APC1] (IRQs 16) ACPI: PCI Interrupt Link [APC2] (IRQs 17) ACPI: PCI Interrupt Link [APC3] (IRQs *18) ACPI: PCI Interrupt Link [APC4] (IRQs *19) ACPI: PCI Interrupt Link [APCE] (IRQs 16) ACPI: PCI Interrupt Link [APCF] (IRQs 20 21 22) ACPI: PCI Interrupt Link [APCG] (IRQs 20 21 22) ACPI: PCI Interrupt Link [APCH] (IRQs 20 21 22) ACPI: PCI Interrupt Link [APCI] (IRQs 20 21 22) ACPI: PCI Interrupt Link [APCJ] (IRQs 20 21 22) ACPI: PCI Interrupt Link [APCK] (IRQs 20 21 22) ACPI: PCI Interrupt Link [APCS] (IRQs *23) ACPI: PCI Interrupt Link [APCL] (IRQs 20 21 22) ACPI: PCI Interrupt Link [APCM] (IRQs 20 21 22) ACPI: PCI Interrupt Link [AP3C] (IRQs 20 21 22) ACPI: PCI Interrupt Link [APCZ] (IRQs 20 21 22) Linux Plug and Play Support v0.97 (c) Adam Belay SCSI subsystem initialized ACPI: PCI Interrupt Link [APCS] enabled at IRQ 23 IOAPIC[0]: Set PCI routing entry (2-23 -> 0xa9 -> IRQ 23 Mode:1 Active:0) 00:00:01[A] -> 2-23 -> IRQ 23 Pin 2-23 already programmed ACPI: PCI Interrupt Link [APCF] enabled at IRQ 20 IOAPIC[0]: Set PCI routing entry (2-20 -> 0xb1 -> IRQ 20 Mode:1 Active:0) 00:00:02[A] -> 2-20 -> IRQ 20 ACPI: PCI Interrupt Link [APCG] enabled at IRQ 22 IOAPIC[0]: Set PCI routing entry (2-22 -> 0xb9 -> IRQ 22 Mode:1 Active:0) 00:00:02[B] -> 2-22 -> IRQ 22 ACPI: PCI Interrupt Link [APCL] enabled at IRQ 21 IOAPIC[0]: Set PCI routing entry (2-21 -> 0xc1 -> IRQ 21 Mode:1 Active:0) 00:00:02[C] -> 2-21 -> IRQ 21 ACPI: PCI Interrupt Link [APCH] enabled at IRQ 20 Pin 2-20 already programmed ACPI: PCI Interrupt Link [APCI] enabled at IRQ 22 Pin 2-22 already programmed ACPI: PCI Interrupt Link [APCJ] enabled at IRQ 21 Pin 2-21 already programmed ACPI: PCI Interrupt Link [APCK] enabled at IRQ 20 Pin 2-20 already programmed ACPI: PCI Interrupt Link [APCM] enabled at IRQ 22 Pin 2-22 already programmed ACPI: PCI Interrupt Link [AP3C] enabled at IRQ 21 Pin 2-21 already programmed ACPI: PCI Interrupt Link [APCZ] enabled at IRQ 20 Pin 2-20 already programmed ACPI: PCI Interrupt Link [APC3] enabled at IRQ 18 IOAPIC[0]: Set PCI routing entry (2-18 -> 0xc9 -> IRQ 18 Mode:1 Active:0) 00:01:06[A] -> 2-18 -> IRQ 18 ACPI: PCI Interrupt Link [APC4] enabled at IRQ 19 IOAPIC[0]: Set PCI routing entry (2-19 -> 0xd1 -> IRQ 19 Mode:1 Active:0) 00:01:06[B] -> 2-19 -> IRQ 19 ACPI: PCI Interrupt Link [APC1] enabled at IRQ 16 IOAPIC[0]: Set PCI routing entry (2-16 -> 0xd9 -> IRQ 16 Mode:1 Active:0) 00:01:06[C] -> 2-16 -> IRQ 16 ACPI: PCI Interrupt Link [APC2] enabled at IRQ 17 IOAPIC[0]: Set PCI routing entry (2-17 -> 0xe1 -> IRQ 17 Mode:1 Active:0) 00:01:06[D] -> 2-17 -> IRQ 17 Pin 2-19 already programmed Pin 2-16 already programmed Pin 2-17 already programmed Pin 2-18 already programmed Pin 2-16 already programmed Pin 2-17 already programmed Pin 2-18 already programmed Pin 2-19 already programmed Pin 2-17 already programmed Pin 2-18 already programmed Pin 2-19 already programmed Pin 2-16 already programmed Pin 2-18 already programmed Pin 2-19 already programmed Pin 2-16 already programmed Pin 2-17 already programmed Pin 2-18 already programmed Pin 2-18 already programmed Pin 2-18 already programmed Pin 2-18 already programmed Pin 2-19 already programmed number of MP IRQ sources: 16. number of IO-APIC #2 registers: 24. testing the IO APIC....................... IO APIC #2...... .... register #00: 02000000 ....... : physical APIC id: 02 ....... : Delivery Type: 0 ....... : LTS : 0 .... register #01: 00170011 ....... : max redirection entries: 0017 ....... : PRQ implemented: 0 ....... : IO APIC version: 0011 .... register #02: 00000000 ....... : arbitration: 00 .... IRQ redirection table: NR Log Phy Mask Trig IRR Pol Stat Dest Deli Vect: 00 001 01 0 0 0 0 0 1 1 31 01 001 01 0 0 0 0 0 1 1 39 02 000 00 1 0 0 0 0 0 0 00 03 001 01 0 0 0 0 0 1 1 41 04 001 01 0 0 0 0 0 1 1 49 05 001 01 0 0 0 0 0 1 1 51 06 001 01 0 0 0 0 0 1 1 59 07 001 01 0 0 0 0 0 1 1 61 08 001 01 0 0 0 0 0 1 1 69 09 001 01 0 1 0 0 0 1 1 71 0a 001 01 0 0 0 0 0 1 1 79 0b 001 01 0 0 0 0 0 1 1 81 0c 001 01 0 0 0 0 0 1 1 89 0d 001 01 0 0 0 0 0 1 1 91 0e 001 01 0 0 0 0 0 1 1 99 0f 001 01 0 0 0 0 0 1 1 A1 10 001 01 1 1 0 0 0 1 1 D9 11 001 01 1 1 0 0 0 1 1 E1 12 001 01 1 1 0 0 0 1 1 C9 13 001 01 1 1 0 0 0 1 1 D1 14 001 01 1 1 0 0 0 1 1 B1 15 001 01 1 1 0 0 0 1 1 C1 16 001 01 1 1 0 0 0 1 1 B9 17 001 01 1 1 0 0 0 1 1 A9 IRQ to pin mappings: IRQ0 -> 0:0 IRQ1 -> 0:1 IRQ3 -> 0:3 IRQ4 -> 0:4 IRQ5 -> 0:5 IRQ6 -> 0:6 IRQ7 -> 0:7 IRQ8 -> 0:8 IRQ9 -> 0:9-> 0:9 IRQ10 -> 0:10 IRQ11 -> 0:11 IRQ12 -> 0:12 IRQ13 -> 0:13 IRQ14 -> 0:14 IRQ15 -> 0:15 IRQ16 -> 0:16 IRQ17 -> 0:17 IRQ18 -> 0:18 IRQ19 -> 0:19 IRQ20 -> 0:20 IRQ21 -> 0:21 IRQ22 -> 0:22 IRQ23 -> 0:23 .................................... done. PCI: Using ACPI for IRQ routing PCI: if you experience problems, try using option 'pci=noacpi' or even 'acpi=off' vesafb: framebuffer at 0xc0000000, mapped to 0xf880c000, size 16384k vesafb: mode is 1280x1024x16, linelength=2560, pages=1 vesafb: protected mode interface info at c000:ea60 vesafb: scrolling: redraw vesafb: directcolor: size=0:5:6:5, shift=0:11:5:0 fb0: VESA VGA frame buffer device Machine check exception polling timer started. IA-32 Microcode Update Driver: v1.13 apm: BIOS version 1.2 Flags 0x07 (Driver version 1.16ac) apm: overridden by ACPI. highmem bounce pool size: 64 pages Loading Reiser4. See www.namesys.com for a description of Reiser4. Installing knfsd (copyright (C) 1996 okir@monad.swb.de). NTFS driver 2.1.6 [Flags: R/W]. udf: registering filesystem ACPI: Power Button (FF) [PWRF] ACPI: Fan [FAN] (on) ACPI: Processor [CPU0] (supports C1) ACPI: Thermal Zone [THRM] (18 C) bootsplash 3.1.3-2003/11/14: looking for picture.... silentjpeg size 155838 bytes, found (1280x1024, 155850 bytes, v3). Console: switching to colour frame buffer device 153x58 pty: 256 Unix98 ptys configured Real Time Clock Driver v1.12 Non-volatile memory driver v1.2 Serial: 8250/16550 driver $Revision: 1.90 $ 8 ports, IRQ sharing disabled ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A Floppy drive(s): fd0 is 1.44M FDC 0 is a post-1991 82077 loop: loaded (max 8 devices) pktcdvd: v0.1.1a 2004-01-04 Jens Axboe (axboe@suse.de) and petero2@telia.com forcedeth.c: Reverse Engineered nForce ethernet driver. Version 0.19. PCI: Setting latency timer of device 0000:00:04.0 to 64 eth0: forcedeth.c: subsystem: 0147b:1c00 bound to 0000:00:04.0 drivers/media/dvb/b2c2/skystar2.c: FlexCopII(rev.130) chip found drivers/media/dvb/b2c2/skystar2.c: the chip has 6 hardware filters driver_initialize MAC address = ff:ff:ff:ff:ff:ff:00:00 DVB: registering new adapter (Technisat SkyStar2 driver). DVB: registering frontend 0:0 (Zarlink MT312)... Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2 ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx NFORCE2: IDE controller at PCI slot 0000:00:09.0 NFORCE2: chipset revision 162 NFORCE2: not 100% native mode: will probe irqs later NFORCE2: 0000:00:09.0 (rev a2) UDMA133 controller ide0: BM-DMA at 0xf000-0xf007, BIOS settings: hda:DMA, hdb:DMA ide1: BM-DMA at 0xf008-0xf00f, BIOS settings: hdc:DMA, hdd:DMA hda: _NEC DV-5800A, ATAPI CD/DVD-ROM drive ide0 at 0x1f0-0x1f7,0x3f6 on irq 14 hdc: NU DVDRW DDW-081, ATAPI CD/DVD-ROM drive hdd: IOMEGA ZIP 100 ATAPI, ATAPI FLOPPY drive ide1 at 0x170-0x177,0x376 on irq 15 hda: ATAPI 48X DVD-ROM drive, 512kB Cache, UDMA(33) Uniform CD-ROM driver Revision: 3.20 hdc: ATAPI 40X DVD-ROM CD-R/RW drive, 2048kB Cache, UDMA(33) ide-floppy driver 0.99.newide hdd: No disk in drive hdd: 98304kB, 32/64/96 CHS, 4096 kBps, 512 sector size, 2941 rpm libata version 0.81 loaded. sata_sil version 0.52 ata1: SATA max UDMA/133 cmd 0xF983A080 ctl 0xF983A08A bmdma 0xF983A000 irq 18 ata2: SATA max UDMA/133 cmd 0xF983A0C0 ctl 0xF983A0CA bmdma 0xF983A008 irq 18 ata1: dev 0 cfg 49:2f00 82:346b 83:7f01 84:4003 85:3c69 86:3c01 87:4003 88:203f ata1: dev 0 ATA, max UDMA/100, 312581808 sectors (lba48) ata1: dev 0 configured for UDMA/100 scsi0 : sata_sil ata2: no device found (phy stat 00000000) ata2: thread exiting scsi1 : sata_sil Vendor: ATA Model: SAMSUNG SP1614N Rev: 0.81 Type: Direct-Access ANSI SCSI revision: 05 SCSI device sda: 312581808 512-byte hdwr sectors (160042 MB) SCSI device sda: drive cache: write through sda: sda1 sda2 sda3 < sda5 sda6 sda7 > Attached scsi disk sda at scsi0, channel 0, id 0, lun 0 Console: switching to colour frame buffer device 153x58 mice: PS/2 mouse device common for all mice serio: i8042 AUX port at 0x60,0x64 irq 12 input: ImPS/2 Generic Wheel Mouse on isa0060/serio1 serio: i8042 KBD port at 0x60,0x64 irq 1 input: AT Translated Set 2 keyboard on isa0060/serio0 I2O Core - (C) Copyright 1999 Red Hat Software I2O: Event thread created as pid 14 i2o: Checking for PCI I2O controllers... I2O configuration manager v 0.04. (C) Copyright 1999 Red Hat Software i2c /dev entries driver i2c_adapter i2c-0: nForce2 SMBus adapter at 0x5000 i2c_adapter i2c-1: nForce2 SMBus adapter at 0x5100 Advanced Linux Sound Architecture Driver Version 1.0.2c. request_module: failed /sbin/modprobe -- snd-card-0. error = -16 PCI: Setting latency timer of device 0000:00:06.0 to 64 intel8x0: clocking to 47376 ALSA device list: #0: NVidia nForce2 at 0xcc081000, irq 21 NET: Registered protocol family 2 IP: routing cache hash table of 8192 buckets, 64Kbytes TCP: Hash tables configured (established 262144 bind 65536) NET: Registered protocol family 1 NET: Registered protocol family 17 ACPI: (supports S0 S3 S4 S5) found reiserfs format "3.6" with standard journal Reiserfs journal params: device sda7, size 8192, journal first block 18, max trans len 1024, max batch 900, max commit age 30, max trans age 30 reiserfs: checking transaction log (sda7) for (sda7) Using r5 hash to sort names VFS: Mounted root (reiserfs filesystem) readonly. Freeing unused kernel memory: 176k freed nvidia: no version magic, tainting kernel. nvidia: module license 'NVIDIA' taints kernel. 0: nvidia: loading NVIDIA Linux x86 NVIDIA Kernel Module 1.0-5336 Wed Jan 14 18:29:26 PST 2004 NTFS volume version 3.1. NTFS volume version 3.1. drivers/usb/core/usb.c: registered new driver usbfs drivers/usb/core/usb.c: registered new driver hub ehci_hcd 0000:00:02.2: EHCI Host Controller PCI: Setting latency timer of device 0000:00:02.2 to 64 ehci_hcd 0000:00:02.2: irq 21, pci mem f985d000 ehci_hcd 0000:00:02.2: new USB bus registered, assigned bus number 1 PCI: cache line size of 64 is not supported by device 0000:00:02.2 ehci_hcd 0000:00:02.2: USB 2.0 enabled, EHCI 1.00, driver 2003-Dec-29 hub 1-0:1.0: USB hub found hub 1-0:1.0: 6 ports detected ohci_hcd: 2003 Oct 13 USB 1.1 'Open' Host Controller (OHCI) Driver (PCI) ohci_hcd: block sizes: ed 64 td 64 ohci_hcd 0000:00:02.0: OHCI Host Controller PCI: Setting latency timer of device 0000:00:02.0 to 64 ohci_hcd 0000:00:02.0: irq 20, pci mem f985f000 ohci_hcd 0000:00:02.0: new USB bus registered, assigned bus number 2 hub 2-0:1.0: USB hub found hub 2-0:1.0: 3 ports detected ohci_hcd 0000:00:02.1: OHCI Host Controller PCI: Setting latency timer of device 0000:00:02.1 to 64 ohci_hcd 0000:00:02.1: irq 22, pci mem f9861000 ohci_hcd 0000:00:02.1: new USB bus registered, assigned bus number 3 hub 3-0:1.0: USB hub found hub 3-0:1.0: 3 ports detected hub 2-0:1.0: new USB device on port 1, assigned address 2 drivers/usb/class/usblp.c: usblp0: USB Bidirectional printer dev 2 if 0 alt 1 proto 2 vid 0x03F0 pid 0x1004 drivers/usb/core/usb.c: registered new driver usblp drivers/usb/class/usblp.c: v0.13: USB Printer Device Class driver svc: unknown version (3) atkbd.c: Unknown key released (translated set 2, code 0x7a on isa0060/serio0). atkbd.c: This is an XFree86 bug. It shouldn't access hardware directly. atkbd.c: Unknown key released (translated set 2, code 0x7a on isa0060/serio0). atkbd.c: This is an XFree86 bug. It shouldn't access hardware directly.