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The file /usr/share/doc/linux-doc/usb/persist.txt.gz mentions that the USB-persist capability can be enabled for a given USB device by writing 1 to the file persist in that device's directory in /sys/bus/usb/devices/$device/power. This is said — if I understood correctly — to allow mountings of volumes on the drive to persist across power loss during suspend.

However, I've discovered that the device I'd like to enable this facility for — a USB hard drive — does not have such a file in its corresponding directory, and that attempts to create it are rebuffed.

Is there perhaps a kernel module that needs to be loaded for this to work? Do I need to build a custom kernel? I'm running Ubuntu 10.10.


UPDATE: Answer posted on Unix & Linux.

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closed as too localized by fossfreedom Feb 21 '12 at 21:48

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

    
cross-posted on Unix and Linux –  intuited Jan 6 '11 at 7:51
    
Hello, this question has no information and activity for a very long time. I am closing it for now. If by any reason you think this question is still viable or useful in anyway or that there is still a good chance it will be answered please flag it to a moderator or add a comment with the reason(s) why you want it open. Regards –  fossfreedom Feb 21 '12 at 21:48

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