On /dev/sda I have sda1 which is my / bootable filesystem for Debian formatted ext4. This is 256MB on a 2TB drive.
I want to set up the rest of the drive as BTRFS for various functions, and I presume that I first have to create a partition using fdisk for this? Since my first part is ext4? So I:
# fdisk /dev/sda
WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted.
WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
switch off the mode (command 'c') and change display units to
sectors (command 'u').
Command (m for help): p
Disk /dev/sda: 2000.4 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Device Boot Start End Blocks Id System
/dev/sda1 1 243202 1953514583+ ee GPT
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 2
No free sectors available
Command (m for help):
-------------------------------------------------
Whaa?
Maybe it's possible that I just mkfs.btrfs /dev/sda and it will set up -only- the remaining space, but I'm afraid that this may destroy my OS.
Also, what if I want to set up the whole drive as BTRFS? Could this be bootable, and can the canned Debian kernel load the BTRFS driver for boot at install? Or would I boot to the CD, mkfs.btrfs the drive, then install Debian? Anyone tried this?
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