JP_Rockagetty_III
June 19th, 2016, 09:02 AM
I am trying to install a RAID-1 system on the following computer:
Asrock AM1H-ITX motherboard, AMD 5350 CPU/GPU, 8 GB Ram
Arctic Alpine M1-Passive CPU cooler
Two 3 TB HGST drives
Fractal Design Node 304 case
Seasonic 600W PSU
APC 500VA UPS is acting "flaky", but it will be replaced soon
I installed Desktop 16.04 from a USB stick using "UEFI mode" with a GPT partition table onto /dev/sda roughly as follows:
1 MB free space
199 MB EFI partition
19999 MB ext4 <-- would like to mount at /
7.5 GB swap
2.7 TB ext4 <-- would like to mount at /home
(Putting documents, spreadsheets etc. on a different partition or hard drive is an old custom I have, starting with Windows 3.1 and Mandrake 8.0, and I'd like to keep things that way if I can.)
After installing onto /dev/sda and rebooting a couple of times to make sure it worked, I used sgdisk to clone the first drive's partition table onto the second drive, and changed the partition type of /dev/sdb2 and /dev/sdb4 to type 28 (Linux Raid). Then I installed mdadm. When I tried to create an md device, here is what I type:
sudo mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/sda2 /dev/sdb2
But the computer tells me that /dev/sda2 is busy (which is true), so the raid device cannot be created.
How do I get around this to create the md device? Can I unmount /dev/sda2 (which is /, basically the whole system) while the computer is running and use mdadm?
Some people have used Ubuntu SERVER 16.04 to set up RAID-1 and then installed ubuntu-desktop 16.04, probably from the Ubuntu Software Center. Has anyone gotten this to work with 16.04? Many tutorials for RAID-1 are out of date, showing prompts and screens for 12.04 and 14.04.
I used a USB stick with SERVER 16.04 to set up RAID-1, but then the rescue software said there was a problem - there was no boot drive.
Can anybody help me out here? Thanks in advance.
(I really don't want to abandon this equipment and spend even more $$$ for a Synology unit because a few keystrokes were missing in my Ubuntu setup.)
Asrock AM1H-ITX motherboard, AMD 5350 CPU/GPU, 8 GB Ram
Arctic Alpine M1-Passive CPU cooler
Two 3 TB HGST drives
Fractal Design Node 304 case
Seasonic 600W PSU
APC 500VA UPS is acting "flaky", but it will be replaced soon
I installed Desktop 16.04 from a USB stick using "UEFI mode" with a GPT partition table onto /dev/sda roughly as follows:
1 MB free space
199 MB EFI partition
19999 MB ext4 <-- would like to mount at /
7.5 GB swap
2.7 TB ext4 <-- would like to mount at /home
(Putting documents, spreadsheets etc. on a different partition or hard drive is an old custom I have, starting with Windows 3.1 and Mandrake 8.0, and I'd like to keep things that way if I can.)
After installing onto /dev/sda and rebooting a couple of times to make sure it worked, I used sgdisk to clone the first drive's partition table onto the second drive, and changed the partition type of /dev/sdb2 and /dev/sdb4 to type 28 (Linux Raid). Then I installed mdadm. When I tried to create an md device, here is what I type:
sudo mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/sda2 /dev/sdb2
But the computer tells me that /dev/sda2 is busy (which is true), so the raid device cannot be created.
How do I get around this to create the md device? Can I unmount /dev/sda2 (which is /, basically the whole system) while the computer is running and use mdadm?
Some people have used Ubuntu SERVER 16.04 to set up RAID-1 and then installed ubuntu-desktop 16.04, probably from the Ubuntu Software Center. Has anyone gotten this to work with 16.04? Many tutorials for RAID-1 are out of date, showing prompts and screens for 12.04 and 14.04.
I used a USB stick with SERVER 16.04 to set up RAID-1, but then the rescue software said there was a problem - there was no boot drive.
Can anybody help me out here? Thanks in advance.
(I really don't want to abandon this equipment and spend even more $$$ for a Synology unit because a few keystrokes were missing in my Ubuntu setup.)