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List:       evms-devel
Subject:    Re: [Evms-devel] Disks segmenting and rebooting
From:       Kevin Corry <kcorry () austin ! rr ! com>
Date:       2002-11-29 17:57:49
[Download RAW message or body]

On Thursday 28 November 2002 02:57, Michel Bouissou wrote:
> Hi again,
>
> When partitioning a disk in Linux using fdisk, it is most of the times
> necessary to reboot the system for the changes in the partition table to be
> taken in account by the kernel.
>
> When I create or modify disk segments in evmsgui, should I reboot the
> system as well before trying to work further on these segments ?
>
> I've noticed that changes I made to disk segments using EVMS on /dev/hd<n>
> are *NOT* reflected by a "fdisk -l /dev/hd<n>" after I quit evmsgui.
>
> Is this of importance, or is EVMS able to compensate this for volumes it
> manages ?

There are very few circumstances when you will need to reboot in order to 
discover newly created or modified volumes. EVMS makes all of the necessary 
kernel updates on the fly.

There are a couple of oddball situations that might require a reboot. The DOS 
segment naming scheme is dependent on the relative positions of the segments 
on a disk. Thus, if you delete a segment in the middle of a disk, the 
segments above that one will need to be renamed. For example, if you start 
with:

hda5, hda6, hda7, hda8, hda9

and you decide to delete hda7, then hda8 must be renamed to hda7 and hda9 
must be renamed to hda8. Sometimes this cannot be accomplished without 
rebooting. However, if this is the case the Engine should display a warning 
telling you to reboot.

Kevin Corry


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