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USB Pen Drive: Not in hardware list


Posts: 10

Hello all,
I can only use my PEN DRIVE once per restart, and it must be plugged in during start up,
and when i unplug it, it disappears from the "Info Center" under the USB section, and won't
come back when i plug the device in, meaning i have to restart if i want to transfer more
data from the pen drive.

Could someone please help?

Regards, Mehtaw.

vlaporte's picture

USB pen drive

Dear Methaw,
Look at this comment -
http://www.mepis.org/node/4494
Luck,
Vince

Vince LaPorte
Marshall, MN 56258

Already tried that, but:

I have already tried that, but the problem is that my pen drive doesnt even show up in "Info Center" which lists hardware, after i follow them intructions, i still cannot use the pen drive.

I think MEPIS is not even knowing the usb device is in existence, let alone not auto mounting!

Any more help? i need it!

Regards, Mehtaw.

Oops, forgot to say

The error message that appears if i try to remount after unmounting the pen drive (after also restarting the computer with it plugged in) is:

"mount: special device /dev/sda1 does not exist
Please check that the disk is entered correctly."

Also no /dev/sda* exist after i unmount, or unplug the pen drive than plug it back in.

2nd time

Hey Mehtaw,

You already posted this same issue, for which I gave you the solution. Look here: http://www.mepis.org/node/6744

Check it out and let us know what the results are. This should not fail.

Newbie or not Newbie, there's always a question

carlops, did you not read this post?

That solution doesnt work, because it not a mount problem, the system doesnt detect my usb hardware AT ALL unless i restart!
not even in "Info Center".

Regards, Mehtaw.

I know it is not a mount

I know it is not a mount problem, but a hotplug problem. It is fairly common that devices only get detected upon boot. This creates a dynamic section in /etc/fstab, which gets deleted when you unplug the drive. That's why you get the mount error.

The solution I gave you will prevent the fstab entry from being deleted, so you can mount / unmount to your heart's content.

Another solution is to mount it manually as root, by issuing the following command: mount /dev/sda1 /mnt/sda1. I recommend the fstab solution however.

Newbie or not Newbie, there's always a question

I mentioned i tried editing the /etc/fstab file

I edited the fstab file, all it did was add a permanent icon to the desktop thats useless unless i start the computer with the pen drive, and not take the pen drive out!

Manually mounting:

root@3[~]# mount /dev/sda1 /mnt/sda1
mount: special device /dev/sda1 does not exist

I have a number of debian

I have a number of debian based distros installed on my system. Most use something called "Hotplug" to handle USB devices. I have an Apacer 1 Gb USB 2.0 pen drive & have never had any problems with it. You might have problems with cheap/spurious Chinese imitation devices using non standard driver chipset.

What you might wanna try is

What you might wanna try is edit the file /etc/hotplug/usb.usermap. The data you need will most importantly be the product id and vendor id. Both are to be found in KDE infocenter when the drive is plugged in. The rest of the settings you could just copy from what is mostly used.

Yesterday I succeeded in getting my USB drive fully hotpluggable in KDE 3.4, also installing hal, udev, pmount, usbmount. I'll create a howto for it, but if you want, I'll sum up the steps here.

Newbie or not Newbie, there's always a question

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