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Thread: Computer / disk access REALLY slow

  1. #1
    Join Date
    Mar 2005
    Location
    Sweden
    Beans
    161
    Distro
    Ubuntu 10.10 Maverick Meerkat

    Computer / disk access REALLY slow

    Hi,

    I just installed Ubuntu 10.10 on my computer and it is so slow.

    I think I have managed to narrow it down to being disk access that's slow by running hdparm.
    Code:
    /dev/sda:
     Timing cached reads:   1774 MB in  2.00 seconds = 886.99 MB/sec
     Timing buffered disk reads:    4 MB in  3.08 seconds =   1.30 MB/sec
    Also when I'm running dmesg I get the following output.
    Code:
    [   65.824014] ata1: lost interrupt (Status 0x51)
    [   65.824034] ata1.00: exception Emask 0x10 SAct 0x0 SErr 0x400100 action 0x6 frozen
    [   65.824039] ata1.00: BMDMA stat 0x26, BMDMA stat 0x0, BMDMA stat 0x0, BMDMA stat 0x0, BMDMA stat 0x0
    [   65.824043] ata1.00: SError: { UnrecovData Handshk }
    [   65.824048] ata1.00: failed command: WRITE DMA
    [   65.824056] ata1.00: cmd ca/00:08:48:a1:9a/00:00:00:00:00/e8 tag 0 dma 4096 out
    [   65.824057]          res 40/00:ff:00:00:00/00:00:00:00:00/40 Emask 0x34 (host bus error)
    [   65.824061] ata1.00: status: { DRDY }
    [   65.824070] ata1.00: hard resetting link
    [   66.144020] ata1.01: hard resetting link
    [   66.620066] ata1.00: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
    [   66.620079] ata1.01: SATA link down (SStatus 0 SControl 300)
    [   66.748063] ata1.00: configured for UDMA/133
    [   66.748068] ata1.00: device reported invalid CHS sector 0
    [   66.748076] ata1: EH complete
    [   98.820017] ata1: lost interrupt (Status 0x51)
    [   98.820037] ata1.00: exception Emask 0x10 SAct 0x0 SErr 0x400100 action 0x6 frozen
    [   98.820042] ata1.00: BMDMA stat 0x26, BMDMA stat 0x0, BMDMA stat 0x0, BMDMA stat 0x0, BMDMA stat 0x0
    [   98.820046] ata1.00: SError: { UnrecovData Handshk }
    [   98.820050] ata1.00: failed command: WRITE DMA
    [   98.820058] ata1.00: cmd ca/00:08:08:89:1a/00:00:00:00:00/e9 tag 0 dma 4096 out
    [   98.820059]          res 40/00:ff:00:00:00/00:00:00:00:00/40 Emask 0x34 (host bus error)
    [   98.820063] ata1.00: status: { DRDY }
    [   98.820072] ata1.00: hard resetting link
    [   99.140023] ata1.01: hard resetting link
    [   99.620084] ata1.00: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
    [   99.620097] ata1.01: SATA link down (SStatus 0 SControl 300)
    [   99.752050] ata1.00: configured for UDMA/133
    [   99.752056] ata1.00: device reported invalid CHS sector 0
    [   99.752067] ata1: EH complete
    [  239.808020] ata1: lost interrupt (Status 0x51)
    [  239.808041] ata1.00: exception Emask 0x10 SAct 0x0 SErr 0x400100 action 0x6 frozen
    [  239.808046] ata1.00: BMDMA stat 0x26, BMDMA stat 0x0, BMDMA stat 0x0, BMDMA stat 0x0, BMDMA stat 0x0
    [  239.808051] ata1.00: SError: { UnrecovData Handshk }
    [  239.808055] ata1.00: failed command: WRITE DMA
    [  239.808063] ata1.00: cmd ca/00:80:a8:08:a0/00:00:00:00:00/e6 tag 0 dma 65536 out
    [  239.808065]          res 40/00:00:00:4f:c2/00:00:00:00:00/00 Emask 0x34 (host bus error)
    [  239.808068] ata1.00: status: { DRDY }
    [  239.808077] ata1.00: hard resetting link
    [  240.128017] ata1.01: hard resetting link
    [  240.604073] ata1.00: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
    [  240.604085] ata1.01: SATA link down (SStatus 0 SControl 300)
    [  240.796062] ata1.00: configured for UDMA/133
    [  240.796069] ata1.00: device reported invalid CHS sector 0
    [  240.796078] ata1: EH complete
    I attach the full dmesg output.

    Any ideas?
    Attached Files Attached Files

  2. #2
    Join Date
    Mar 2005
    Location
    Sweden
    Beans
    161
    Distro
    Ubuntu 10.10 Maverick Meerkat

    Re: Computer / disk access REALLY slow

    I think I have solved it. I replaced my SATA cable + removed my wlan dongle. Strange and I'm not sure it works but it has been running for some hours now.

    The behavior was really strange. I dual boot the machine with win7 and in windows it worked fine. For some hours. Then suddenly it started acting weird in windows as well. So I figured it must be a hardware failure. I think the problem was the SATA cable being broken or not properly connected.
    Last edited by ola; December 2nd, 2010 at 11:21 AM.

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