extending space

[Lennart Sorensen]

On Sat, Aug 20, 2011 at 05:26:29PM -0400, James Knott wrote:
> Rajinder Yadav wrote:
> >My /home partition is almost out of space, I just bought a new
> >drive, is there a way for me to increase the space on my /home
> >partition buy creating a 2nd /home partition on the other drive
> >and "double" mounting it?
> >
> >Can I do this on Linux to create a larger virtual /home partition?
> >Over do I need to copy over everything to the new /home partition
> >and only mount that under /home
> >
> >Thanks
> >
> You can move the /home to the new drive.  However, before you do
> that, you probably want to mount the new drive at a temporary mount
> point, so that you can copy the contents of /home to it.  Once the
> new drive is in service, you can then free up the space used by the
> old /home.  BTW, this indicates one of the benefits of logical
> volume management.  With it, you'd just add the new drive to the
> volume and expand partitions to use the space.  I did that a while
> ago, when I installed a much larger drive in a notebook computer.
> Rather than attempt to resize the existing system, I just added the
> new free space to the volume.  The only caveat is /boot cannot be in
> the logical volume.   I set up a server at work recently with 4 1 TB
> drives.  I created a 2 GB slice of the first drive for /boot (yeah,
> I know, far more than required) and used the 1st 2 GB on the
> remaining 3 drives for swap.  I then created a RAID 4 arrary of the
> remaining disk space, where I then created a LVM, which will allow
> me to adjust partition sizes as needed.

I run with 25G raid1 / and 25G raid1 /home, and the remainder of the 4
drives as raid5 doing LVM.

You can boot from software raid1, and having redundant boot is nice.

If you are using LVM without raid underneath then you are living very
very dangerously.  I hope your backups are good and you don't value your
time at all.

-- 
Len Sorensen
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