Installation With Two Hard Drives

I would like to install one instance of Arch Linux on both of my hard drives. Arch recognizes both drives but, during the installation, I seem to only be able to select one. I realize I could go back later and reformat the second drive after installing on the first, but it would like the OS to perceive the collective disk space as one large drive. I know Red Hat will install on multiple drives during the setup. Can Arch?
Thanks in advance

I'll try to summerize the procedure:
1. start the system with the installmedia, (if needed: use km to select your keymap and consolefont) and start /arch/setup
2. prepare harddrive (select: partion harddrive):
1st hdd (depending on the version of the install cd you are using: hda/sda):
Partition 1: /boot ~100mb, bootable, type=83
Partition 2: swap 256mb - 2g (depending on your needs, the size of your ram and your hdd), type=82
Partition 3: lvm remaining space, type=8e
2nd hdd (hdb/sdb):
Partition 1: lvm, entire space, type=8e
3. after that, switch to another terminal (alt + f2) and create the lvm:
lvm pvcreate /dev/sda3
lvm pvcreate /dev/sdb1
lvm vgcreate <some volumegroup name> /dev/sda3
lvm vgextend <the same volumegroup name> /dev/sdb1
now you can use the following command to add as many logical volumes as you want:
lvm lvcreate --size <size of partition> --name <name of lgocial volume> <volumegroup name as above>
eg:
lvm lvcreate --size 10G --name root systemname
lvm lvcreate --size 50G --name home systemname
4. Now switch back to the installer (alt + F1) and select "set filesystem mountpoints". You see a list of partitions which the installer found on your system. And for every logical volume you created there should be an entry named: "/dev/mapper/<volumegroupname>-<name of logical volume>".
First you can select a partition for swap (eg: /dev/sda2)
Then you can select a partition and filesystem for / (eg: /dev/mapper/systemname-root, ext3), /boot (eg: /dev/sda1, ext2) and each other directory for which you created an logical volume (/home, /var, ...).
The rest of the installation should work as with any normal install, except a few things (Some of this is probably allready done by the installer):
You need to enable the lvm2 hook in /etc/mkinitcpio.conf (before filesystems)
Change USELVM="no" to USELVM="yes" in /etc/rc.conf
Edit /boot/grub/menu.lst and change the root parameter in your kernel commandline to something like that: "root=/dev/mapper/<volumegroupname>-<root-volume>"
I hope this isn't written to confusing and helps you.
Last edited by gothmog.todi (2007-08-18 10:59:14)

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Message was edited by: biz123

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