Douglas Allan Tutty wrote:
8< snip

Here's how I do it.  I have two 80 GB drives.  Each is partitioned
identically with three partitions:

        1.      64 MB   Used for raid1, makes md0, JFS, /boot
                since grub can't read LVMs

2. 16 GB Used for raid1, makes md1. This one block device is the physical volume for volume group 'system'.
                Since I put the current backup in /var/local (see below), size 
this
                to hold the debian system plus the size of your backup
                set, unless you're using streaming tape or other
                direct-to-off-the-box backup setup.
        
        3.      remainder (64 GB), each used for PVs for volume group
                'local'.

VG 'system' is broken up into LVs:
        
        root    300 MB, JFS, mounted on /
        usr     4 GB, JFS, /usr
        var     6 GB, JFS, /var
        swap    1 GB.  Yes swap is on LV on raid1.

/tmp is on tmpfs

This way, one drive failure doesn't cause the system to crash since even
swap is protected by raid1.

VG 'local' right now only has one LV:
        home    12 GB, JFS, /home.
                This is just straight LVM, I can add a drive (PV) to VG
                local and extend /home anytime.

When I get into video editing, I'll likely create a stripped LV and
mount it somewhere, make it sticky like /tmp so user's can use it.

Interesting, the layout I was considering with 2 drives was to have the system (including swap and /tmp) on a RAID0 array with the resultant speed boost that entails, and have /home on a RAID1 array with the protection that offers. If a drive goes down the system crashes and I have to reinstall, but that's not hard and I've still got my personal data, plus I've been enjoying what should have been a noticeably more responsive system in the meantime.

--
Arrr, do your bit for global warming, become a pirate, you can borrow my copy of Windows 95 if you want.


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