http://bugzilla.kernel.org/show_bug.cgi?id=11635 Summary: strange message in dmesg for IDE HDD: cannot use LBA48 DMA - PIO mode will be used for accessing sectors > 268435456 Product: IO/Storage Version: 2.5 KernelVersion: 2.6.26.1 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: IDE AssignedTo: io_ide@xxxxxxxxxxxxxxxxxxxx ReportedBy: enrique_pinos@xxxxxxxx Latest working kernel version: unknown Earliest failing kernel version: detected on kernel-2.6.25 Distribution: gentoo Hardware Environment: Asus A7A266 motherboard with BIOS upgraded to latest release (no beta version of upgrade) lspci output: 00:00.0 Host bridge: ALi Corporation M1647 Northbridge [MAGiK 1 / MobileMAGiK 1] (rev 04) 00:01.0 PCI bridge: ALi Corporation PCI to AGP Controller 00:02.0 USB Controller: ALi Corporation USB 1.1 Controller (rev 03) 00:04.0 IDE interface: ALi Corporation M5229 IDE (rev c4) 00:05.0 Multimedia audio controller: C-Media Electronics Inc CM8738 (rev 10) 00:06.0 USB Controller: ALi Corporation USB 1.1 Controller (rev 03) 00:07.0 ISA bridge: ALi Corporation M1533/M1535 PCI to ISA Bridge [Aladdin IV/V/V+] 00:0a.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10) 00:0c.0 Serial controller: Rockwell International HCF 56k Data/Fax Modem (rev 01) 00:11.0 Bridge: ALi Corporation M7101 Power Management Controller [PMU] 01:00.0 VGA compatible controller: nVidia Corporation NV4 [RIVA TNT] (rev 04) Software Environment: Gentoo Linux. Problem Description: Hdd is slow and dmesg show a strange message Steps to reproduce:compile kernel and boot Output of script/ver_linux If some fields are empty or look unusual you may have an old version. Compare to the current minimal requirements in Documentation/Changes. Linux AServer 2.6.26.1 #1 Wed Sep 24 00:18:06 CEST 2008 i686 AMD Athlon(TM) XP1600+ AuthenticAMD GNU/Linux Gnu C 4.1.2 Gnu make 3.81 binutils 2.18 util-linux 2.13.1.1 mount 2.13.1.1 module-init-tools 3.4 e2fsprogs 1.40.9 reiserfsprogs 3.6.19 Linux C Library 2.6.1 Dynamic linker (ldd) 2.6.1 Procps 3.2.7 Net-tools 1.60 Kbd 1.13 Sh-utils 6.9 udev 124 Modules Loaded ipt_REJECT ipt_LOG ipt_addrtype xt_pkttype xt_multiport xt_MARK xt_mac xt_iprange xt_tcpudp xt_state nf_conntrack_ipv4 nf_conntrack iptable_mangle nfnetlink iptable_filter ip_tables x_tables ohci_hcd usbcore i2c_ali1535 dmesg output: ide0 at 0x1f0-0x1f7,0x3f6 on irq 14 ide1 at 0x170-0x177,0x376 on irq 15 hda: max request size: 128KiB hda: cannot use LBA48 DMA - PIO mode will be used for accessing sectors > 268435456 hda: 488397168 sectors (250059 MB) w/8192KiB Cache, CHS=30401/255/63 hda: cache flushes supported hda: hda1 hda2 hda3 hda4 hdc: max request size: 128KiB hdc: cannot use LBA48 DMA - PIO mode will be used for accessing sectors > 268435456 hdc: 488397168 sectors (250059 MB) w/8192KiB Cache, CHS=30401/255/63 hdparm output: hdparm -Tt /dev/hdc output: /dev/hdc: Timing cached reads: 388 MB in 2.01 seconds = 193.07 MB/sec Timing buffered disk reads: 142 MB in 3.03 seconds = 46.89 MB/sec (I want to get something above 500MB/sec) May it help (googled) i found that related info: https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.20/+bug/119730 http://osdir.com/ml/ide/2005-03/msg00064.html -- Configure bugmail: http://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug, or are watching the assignee. -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
