(fwd) Re: Proposed road map for 1 SSD & 2 HDDs set up in btrfs as RAID1 -- success!! - luv-main

25 Feb 2019

----- Forwarded message from Andrew Greig &lt;pushin.linux(a)gmail.com&gt; -----

Date: Mon, 25 Feb 2019 21:50:56 +1100
From: Andrew Greig &lt;pushin.linux(a)gmail.com&gt;
To: Craig Sanders &lt;cas(a)taz.net.au&gt;
Subject: Re: Proposed road map for 1 SSD & 2 HDDs set up in btrfs as RAID1 --
success!!

Hi all,

I have a working GUI and and a working btrfs RAID1, data is loading at present
but it is a lot slower as the feed is from USB3 to a SATA HDD. But I can work
with that. Really overjoyed, I have learned a lot, and probably tormented
Craig and the list a lot, BUT I AM GRATEFUL!!

Thank you

Andrew

On 25/2/19 1:22 pm, Craig Sanders via luv-main wrote:
...
  On Mon, Feb 25, 2019 at 06:44:57AM +1100, Andrew Greig
wrote:
  Now it is time to see if I have learned
anything.

 1Tb SSD and 2 x 2Tb SATA HDDs, motherboard is a UEFI board but I have never
 used UEFI with this board.

 Ubuntu desktop obviously ignored it.

 Using Gparted partition the SSD thus:

 512MB EFI Partition /dev//sda1, formatted FAT32, primary       (boot?)
 8 Gb allocated to SWAP

 rest of the disk _*/*__dev/_sda2, primary, formatted btrfs mounted as /  Looks good
except that if you have an EFI partition (sda1) and a swap
 partition (sda2) then the btrfs root partition will be sda3, not sda2.

  Partition the first HDD /dev/sdb1primary,
formatted btrfs , mounted as /data

 Second HDD same size leave completely blank  The second 2TB HDD (sdc) needs to be
partitioned exactly the same as the first
 (sdb).

 I don't think gparted will let you create a partition without formatting it
 (as a filesystem or as swap or whatever), so just let it format the partition
 and then run the btrfs commands as below.

  After the system is installed add the second HDD
withtwo lines in the
 terminal

            sudo btrfs device add -f /dev/sdc1 /data
            sudo btrfs balance start -dconvert=raid1 -mconvert=raid1 /data  You can
do this after the system is installed, or from a root shell while
 booted on gparted.  It doesn't matter either way, although it's probably
 better/easier to do it from gparted (there'll only be the one /data fs for the
 ubuntu installer to detect so you won't end up with /data0 and /data1 again)

 craig

 --
 craig sanders &lt;cas(a)taz.net.au&gt;
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