“UbuntuHelp:DebuggingUSBStorage”的版本间的差异
来自Ubuntu中文
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{{Languages|UbuntuHelp:DebuggingUSBStorage}} | {{Languages|UbuntuHelp:DebuggingUSBStorage}} | ||
=== USB2 Issues === | === USB2 Issues === | ||
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This can be worked around easily. Simply run this command: | This can be worked around easily. Simply run this command: | ||
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<pre><nowiki> | <pre><nowiki> | ||
sudo rmmod ehci_hcd | sudo rmmod ehci_hcd | ||
</nowiki></pre> | </nowiki></pre> | ||
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=== Buffer I/O Errors === | === Buffer I/O Errors === | ||
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If you see errors related to Buffer I/O when attaching a USB Storage device, there are two ways to work around it. First, try using varying max_sectors settings, as such: | If you see errors related to Buffer I/O when attaching a USB Storage device, there are two ways to work around it. First, try using varying max_sectors settings, as such: | ||
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<pre><nowiki> | <pre><nowiki> | ||
sudo sh -c "echo 120 > /sys/block/sda/queue/max_sectors_kb" | sudo sh -c "echo 120 > /sys/block/sda/queue/max_sectors_kb" | ||
</nowiki></pre> | </nowiki></pre> | ||
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Try values of 120, 64 and 32. | Try values of 120, 64 and 32. | ||
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If this does not resolve the issue, then you may need an unusual_dev entry for your device. It would look something like this: | If this does not resolve the issue, then you may need an unusual_dev entry for your device. It would look something like this: | ||
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<pre><nowiki> | <pre><nowiki> | ||
UNUSUAL_DEV(0x03eb , 0x2002, 0x0100, 0x9999, | UNUSUAL_DEV(0x03eb , 0x2002, 0x0100, 0x9999, | ||
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US_FL_IGNORE_RESIDUE), | US_FL_IGNORE_RESIDUE), | ||
</nowiki></pre> | </nowiki></pre> | ||
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The vendor and device ID's can be obtained from the output of "lsusb". The entry would be placed in drivers/usb/storage/unusual_devs.h. If you cannot compile your own kernel, please file a bug report, and we'll attempt to compile a test module for you. | The vendor and device ID's can be obtained from the output of "lsusb". The entry would be placed in drivers/usb/storage/unusual_devs.h. If you cannot compile your own kernel, please file a bug report, and we'll attempt to compile a test module for you. | ||
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[[category:CategoryDocumentation]] [[category:CategoryCleanup]] | [[category:CategoryDocumentation]] [[category:CategoryCleanup]] | ||
[[category:UbuntuHelp]] | [[category:UbuntuHelp]] | ||
2007年11月30日 (五) 16:41的版本
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USB2 Issues
This can be worked around easily. Simply run this command:
sudo rmmod ehci_hcd
Buffer I/O Errors
If you see errors related to Buffer I/O when attaching a USB Storage device, there are two ways to work around it. First, try using varying max_sectors settings, as such:
sudo sh -c "echo 120 > /sys/block/sda/queue/max_sectors_kb"
Try values of 120, 64 and 32. If this does not resolve the issue, then you may need an unusual_dev entry for your device. It would look something like this:
UNUSUAL_DEV(0x03eb , 0x2002, 0x0100, 0x9999, "Generic", "MusicDrive", US_SC_DEVICE, US_PR_DEVICE, NULL, US_FL_IGNORE_RESIDUE),
The vendor and device ID's can be obtained from the output of "lsusb". The entry would be placed in drivers/usb/storage/unusual_devs.h. If you cannot compile your own kernel, please file a bug report, and we'll attempt to compile a test module for you.
