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Thread: I/O error and unshielded cable

  1. #1
    Join Date
    Jan 2006
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    Poland
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    I/O error and unshielded cable

    Hello,
    I just find out why my wl500gx produces a lot of following errors during heavy load.
    Code:
    kernel: I/O error: dev 08:01, sector 12
    kernel: SCSI disk error : host 0 channel 0 id 0 lun 0 return code = 70000
    kernel: I/O error: dev 08:01, sector 789
    kernel: SCSI disk error : host 0 channel 0 id 0 lun 0 return code = 70000
    kernel: I/O error: dev 08:01, sector 1
    it's caused by unshielded wire conecting my internal 2,5'' 40 GB toshiba hd with asus mineboard. After opening casing, when cable was not so close to board, everything was fine. I change cable for shorter and shielded one, add additional 100uF cabacitor neer to HD and now everything works fine, even when i run 10 screen sessions copying a lot of data .
    regards
    Krzysiek
    Last edited by qczek; 06-03-2006 at 14:44.

  2. #2
    Join Date
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    I can also confirm that this is a way to go. Shortened cable to 40cm and added 1000uF+100uF @ 5V, 200uF @ 12V supply. But I think that capacitors is the solution. Not the cable length. Anyway, worth trying when SCSI errors pop up.
    Last edited by oleo; 27-03-2006 at 21:37.

  3. #3
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    Jan 2006
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    Hello,
    Where did you find 12V cable? Do you have 3,5 inch hard drive with external power supply instaled ?
    regards
    krzysiek
    Last edited by qczek; 28-03-2006 at 22:53.

  4. #4
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    Yes. External Revoltec 3.5" alu case with both 12V and 5V supply wires. +12V seems to be obsolete nowdays for many drives.

  5. #5
    Hello!
    My external HDD is good working with my PC(WinXP), but with the router it makes errors.
    Log:
    May 21 12:03:11 kernel: SCSI disk error : host 1 channel 0 id 0 lun 0 return code = 8000002
    May 21 12:03:11 kernel: Current sd08:11: sns = 70 0
    May 21 12:03:11 kernel: Raw sense data:0x70 0x00 0x00 0x00 0x00 0x00 0x00 0x0a 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
    May 21 12:03:11 kernel: I/O error: dev 08:11, sector 17042424
    When I try to copy big files on it the router freezes or the HDD hangs. I have tried 2 different HDD-s, but the same result. I have now an 160GB Seagate HDD, with an LC POWER External USB 2.0 enclosure. Is that a cable issue too?
    Sorry for my bad english

  6. #6
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    Try it and you will know.

  7. #7
    I had a USB key plugged in with the HDD when the error happened. Since only the HDD is plugged in, it works fine. Neither errors on heavy load. The problem is gone...

  8. #8
    Quote Originally Posted by oleo View Post
    I can also confirm that this is a way to go. Shortened cable to 40cm and added 1000uF+100uF @ 5V, 200uF @ 12V supply. But I think that capacitors is the solution. Not the cable length. Anyway, worth trying when SCSI errors pop up.
    Hi Oleo,

    Could you be more specific? I'm having the same problem. Where should I add the capacitor? USB HD side or WL-500gp side?

    Thanks,
    Simon

  9. #9
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    Shortening cable works. Capacitors are optional. It should be added at the connector inside case.

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