Partition naming, fstab, and geli
jerrymc at msu.edu
Mon Nov 16 14:59:02 UTC 2009
On Sun, Nov 15, 2009 at 07:23:15PM -0700, David Allen wrote:
> Say I have performed a standard installation of FreeBSD onto a single IDE
> drive with the following entries in /etc/fstab:
> /dev/ad0s1b none swap sw 0 0
> /dev/ad0s1a / ufs rw 1 1
> /dev/ad0s1d /var ufs rw 2 2
> /dev/ad0s1e /tmp ufs rw 2 2
> /dev/ad0s1f /usr ufs rw 2 2
> Then I added more drives.
> 1. The Handbook suggests there is a convention that when partitioning a a
> drive that's been added, to label the first new partition on that drive as
> 'e' as opposed to 'a' (which is reserved for the /root partition). Does
> the following satisfy that convention, or would starting with 'a' in each
> case make more sense?
It really doesn't matter. Just don't use 'c' and I usually skip
using 'b' and even often use it for a little additional swap.
But, just pick a habit that works for you and stick with it.
> /dev/ad1e /foo1 ufs rw 2 2
> /dev/ad1f /bar1 ufs rw 2 2
> /dev/ad1g /baz1 ufs rw 2 2
> /dev/ad2e /foo2 ufs rw 2 2
> /dev/ad2f /bar2 ufs rw 2 2
> /dev/ad3e /foo3 ufs rw 2 2
> /dev/ad3f /bar3 ufs rw 2 2
> 2. My second question is in regards to using the 'xx' fstype to have the
> system ignore that device.
Leave the fstype alone.
Use the noauto option.
Probably set dump and pass to 0 also.
So, for example, if you do not want it to try and mount /dev/ad3f at
boot time, the line would look like:
/dev/ad3f /bar3 ufs rw,noauto 0 0
> Consider, for example, a geli encrypted partition. The .eli device
> doesn't exist at boot time. I discovered by accident that the system
> won't boot with an fstab entry for a device that doesn't exist. So if I
> was to record an entry in fstab, I couldn't use
> /dev/ad1e.eli /home/david/private ufs rw 0 0
> Does that mean that the following is what's typically to record fstab
> entries for ignored devices?
> /dev/ad1e.eli /home/david/private xx rw 0 0
> /dev/ad3e /fake xx rw 0 0
> /dev/ad3f /reserved xx rw 0 0
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