LVM partitions on ax external USB HD

[Antonio Montagnani]

John Austin ha scritto / wrote  il / on 12/04/2005 12:07:

>On Tue, 2005-04-12 at 09:22 +0200, Antonio Montagnani wrote:
>  
>
>>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???
>>>>        
>>>>
>
>  
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>>>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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>>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.
>>    
>>
>Hi
>I may be able to help with the second question
>I have a pdf document which I can email direct if you want
>Let me know
>John
>
>
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John, great!!! please e-mail and we (as we are trying to set this 
portable Fedora, we followed Simon's document but it worked with a 
double boot laptop, not installing Grub on USB disk) will report our efforts

-- 
Antonio Montagnani

Mob.+393386586046

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