Sorry, Alan.

The comments before yours were bottom-posted.

I'm afraid under these circumstances I can't find your top-posted comments pertinent.

I simply can't make any sense of them.

Your mailer also used HTML.

If you wish to make postings of this kind then I would be grateful if you could place me on your ignore list, and not make such replies to my messages.

Stroller.



On 5 Oct 2009, at 09:02, Alan E. Davis wrote:

With Flash drive partitions labeled, the mounting is consistent. I have a git bare repo directory, on each of two flash drives to keep certain directories in sync on three machines. The repos are found consistently by git this method. I don't remember any specific method I used to get this mounting behavior into place, but I have had to specifically set GID for my user account on each machine to keep permissions in line.

By the way, when I reformatted a drive, I just used the same label, which seemed to work fine. I wonder though whether this system might be defeated by convolutions of various kinds outside my control at a future time.

Alan

On Sun, Oct 4, 2009 at 5:24 AM, Stroller <strol...@stellar.eclipse.co.uk > wrote:

On 3 Oct 2009, at 20:11, daid kahl wrote:
...
Another useful notion is to use udev to automount flash drives (or external usb harddrives) to a specified location based on serial number. ... I can either give an overview or dig up the url if anyone likes.

I'd have assumed you simple used any of the usual "automount drives with udev" guides. Am I wrong?

This is the way I have always intended to approach this problem, so I'd be grateful to be corrected in advance if there's a better way.

That's correct, except not all of these guides discuss the drive serial number. If you want to ensure that different drives are mounted at different points, you have to rely on the device serial (since the /dev nodes are filled in order of the device connection, regardless of which drive it is).

There are plenty of guides that mention how to find the serial number and how to write the correct udev rules, but most the guides are outdated and suggest use of the symlink udevinfo, which was removed upstream recently. So, to get a device's serial number, for example (replace /dev/sdb with the correct node) :

# udevadm info -a -p $(udevadm info -q path -n /dev/sdb) | grep ATTRS{serial}

and use the (first) serial that doesn't have colons and periods. Then for the udev rule you just need to include ATTRS{serial}==" 0000000000"

This is also useful when you have external harddrives that use ext3 formatting and flashdrives that don't.

Ooooops... I omitted a paste - I went to a terminal to check the details and then appear to have completely forgotten to include them. Thus my question is misphrased & incomplete.

I intended to ask:

I'd have assumed you simple used any of the usual "automount drives with udev" guides, but based their entry in "/dev/disk/by- uuid/". Am I wrong?

How do you find the serial, please? I'm guessing from `dmesg`?

I think the entry in "/dev/disk/by-uuid/" may change if you reformat the drive, so your response is most helpful.

Thank you for your help,

Stroller.




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