LVM partitions on ax external USB HD

[Antonio Montagnani]

Rick Wagner ha scritto / wrote  il / on 12/04/2005 00:53:

>On Sunday 10 April 2005 2:34 am, Antonio Montagnani wrote:
>  
>
>>I tried to install Fedora on an external USB HD.
>>Of course booting from it didn't work.
>>On the disk there are an ext3 partition /boot and a LVM partition
>>If I connect the HD to a PC as USB device it is correctly mounted but I
>>see only the ext3 partition.
>>How can I see also the LVM???
>>
>>    
>>
>
>Since no one else has answered, I'll take a stab.  I have used LVM on several 
>permanent hard drives, but never on removables.  However I think what your 
>looking to do is a udev script.  Check out the information on udev.  Also 
>look for hotplug.  
>
>What you'll want your script to do is upon detecting the plugging of your USB 
>drive, it will want to scan (vgscan/lvscan) the drive for LVM volumes, then 
>activate the volume (vgchange/lvchange --available=yes).
>
>I'm not sure what you want to do for unplugging.  I expect that you'll need a 
>script to flush then deactivate the volumes prior to pulling the plug on the 
>drive.
>
>As I said, I don't know much about hotplug and udev, but this may give you 
>some additional search hints.
>
>	--rick
>
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>>    
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Rick,

Tnx for you reply.

There are two separate issues:

1) how to manage a LVM partitioned removable device (USB hard disk, key 
etc.): does it make any sense to have them partitioned as LVM??
2) how to install Fedora on a removable device (USB hard disk, for 
example) and boot off it (with Grub installed on it, in order to have a 
removable Fedora installation for every occasion)

I have not enough skill to solve them. Any idea??

-- 
Antonio M.

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