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September 16th, 2007 (as amended)
This procedure details how to add a hard disk to an existing FreeBSD installation. I had a spare drive, I wanted to install it so I could cd to it, make directories, copy files to it, etc.
- install hard drive into the computer (ensure to set jumpers correctly)
- ensure BIOS can see the drive correctly
- boot FreeBSD
- login as root
- run dmesg
- note the devicename given to the new drive - it should be visible at the end of the dmesg output (eg. ad1)
- create a mountpoint for the new drive (eg. mkdir /mnt/ad1)
- (optional) to see the existing partitions on the drive, run fdisk devicename (eg. fdisk /dev/ad1)
- run sysinstall
- select Configure, then select Fdisk
- from the drive selection menu, select the drive to work with (the devicename noted earlier will be listed here)
- press A to erase all existing partitions and allocate all the space to FreeBSD
- press W to write the new partition table to the disk (NOTE: all existing data on the drive will be lost at this point!) [accept warning if prompted]
- press Esc to select None - leave MBR untouched (unless you have reasons for doing otherwise)
- press Q, then select OK to quit Fdisk
- press Esc to exit the drive selection menu
- select Label
- press C to create a new FreeBSD slice
- define the size of the slice (press Enter to accept the default maximum size)
- select FS (filesystem)
- specify the mountpoint for the new drive made earlier (eg. /mnt/ad1) - this is the path to the new drive, created earlier
- press W to write the slice to disk [accept warning if prompted]
Note: if you do not see newfs format the slice, and/or you get an 'unable to write' message, repeat this step. When successful, a file called ".snap" should be visible in the root of the drive.
- press Q to quit the label editor
- press Esc, Esc, and Esc to exit back to the command prompt
The drive will then be available for use, in /mnt/ad1. It will also be listed in the output of the df command.
- The drive will NOT be automatically re-mounted after a reboot. To auto-mount the drive at boot, add something like this to /etc/fstab:
/dev/ad1s1d /mnt/ad1 ufs rw 0 0
- You may wish to change group ownership and permissions, if other users will be using the drive. Use syntax like this:
chgrp -R usergroup /mnt/ad1
chmod -R 775 /mnt/ad1
Those two commands will give write access to all users in the group "usergroup".
- To mount the volume manually, use a command similar to:
mount /dev/ad1s1d /mnt/ad1
Substitute the correct name of your device and mountpoint.