“UbuntuHelp:DebuggingUSBStorage”的版本间的差异
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小 （New page: {{From|https://help.ubuntu.com/community/DebuggingUSBStorage}} {{Languages|php5}} === USB2 Issues === This can be worked around easily. Simply run this command: <pre><nowiki> sudo rmmod ...） |
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{{From|https://help.ubuntu.com/community/DebuggingUSBStorage}} | {{From|https://help.ubuntu.com/community/DebuggingUSBStorage}} | ||
| − | {{Languages| | + | {{Languages|UbuntuHelp:DebuggingUSBStorage}} |
| − | + | == 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> | ||
| − | + | == 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. | ||
| − | + | == Bug Reports == | |
| − | + | If you are filing a bug report, please include the following as attachments along with a detailed description of your problem. | |
| + | * Initiate the problem situation, then quickly get the output of <code><nowiki>dmesg</nowiki></code> | ||
| + | * Output of <code><nowiki>uname -a</nowiki></code> | ||
| + | * Output of <code><nowiki>lsb_release -a</nowiki></code> | ||
| + | * Output of <code><nowiki>lsusb -v</nowiki></code> | ||
| + | * any other data relevant to your problem | ||
| + | == Further Help == | ||
| + | For help with mounting external drives, see [[UbuntuHelp:Mount/USB|Mount/USB]]. | ||
| + | For further help in troubleshooting, ask on the [[UbuntuWiki:UbuntuForums|Ubuntu Forums]] at http://ubuntuforums.org/ | ||
| + | ---- | ||
| + | [[category:CategoryUsb]] | ||
[[category:UbuntuHelp]] | [[category:UbuntuHelp]] | ||
2009年11月17日 (二) 18:52的最新版本
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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.
Bug Reports
If you are filing a bug report, please include the following as attachments along with a detailed description of your problem.
- Initiate the problem situation, then quickly get the output of
dmesg - Output of
uname -a - Output of
lsb_release -a - Output of
lsusb -v - any other data relevant to your problem
Further Help
For help with mounting external drives, see Mount/USB. For further help in troubleshooting, ask on the Ubuntu Forums at http://ubuntuforums.org/
