![linux softraid setup which drives are mirrors linux softraid setup which drives are mirrors](https://cloudcone.com/docs/wp-content/uploads/sites/2/2019/01/file-system-setup.png)
- #LINUX SOFTRAID SETUP WHICH DRIVES ARE MIRRORS SOFTWARE#
- #LINUX SOFTRAID SETUP WHICH DRIVES ARE MIRRORS FREE#
#LINUX SOFTRAID SETUP WHICH DRIVES ARE MIRRORS FREE#
Checking the free space to create a partition. Before creating partition make sure that how many cylinders has been used and how many are free. In our case, we will create two partitions using fdisk command (you can use a partition or whole disk). We'll create the first softRAID partition (md0) by selecting the two "partition 2" entries (one from each disk). To create LVM mirror, you need to be sure having free space.
#LINUX SOFTRAID SETUP WHICH DRIVES ARE MIRRORS SOFTWARE#
Now click on "Create software RAID (md)" under AVAILABLE DEVICES.Under each disk on AVAILABLE DEVICES you will now see "partition 4". "Add GPT Partition" on the 1st disk, do not set a size (so it uses all available) and choose to leave it unformatted as with all the other partitions you created so far. Under each disk on AVAILABLE DEVICES you will now see "partition 3". let's say 16G cause we have 16G of actual RAM - but it's really up to you to decide that) and choose to leave it unformatted. "Add GPT Partition" on the 1st disk, give it the same or half the size of your RAM (e.g.
![linux softraid setup which drives are mirrors linux softraid setup which drives are mirrors](https://blogtechnology.net/storage/2021/06/Select-Anarchy-Install-Drive.png)
Now we'll prepare the swap partitions.Under each disk on AVAILABLE DEVICES you will now see "partition 2". These will be the /boot partitions for the softRAID array. So go ahead and "Add GPT Partition" on the 1st disk, give it a 1G size and choose to leave it unformatted.The trick to setup a softRAID array is to create partitions for /boot, swap and / on each disk, but WITHOUT formatting them (and as such, there won't be a mount point for now).These small partitions will be used by GRUB for booting the server. With my two-way mirror setup of 3 6TB WD Reds, I get 120-140MB/s write on the drives which is very fast for me whereas I get 170MB/s write on the drives individually. You should now see two 1.000M bios_grub partitions created under USED DEVICES. Two-way mirrors require 2 or more drives and allow 1 disk failure, Three-way mirrors require 5 or more drives and allow 2 disk failures.Now select the 1st disk to add as "boot" disk (same menu that had REFORMAT in).This will (temporarily) wipe out the partitions. If the disks have existing partitions, click on each disk under AVAILABLE DEVICES and then select REFORMAT.Select "Custom storage layout" when you reach the storage configuration step of the installer.And as of March 2021 it's possible that there's a bug as well with how the bios_grub partitions are created when using multiple disks. Let's start with the basics: the official guide by Ubuntu ( ) is outdated/wrong. Looking to create a Software RAID 1 setup for your 2-disk server on Ubuntu Server 20.04?