Re: What is the best way to set up RAID-1 on new Ubuntu install

[Adam Niescierowicz <adam.niescierowicz@justnet.pl>]

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W dniu 3.09.2025 o 23:04, Jeffery Small pisze:
> I will be installing Xubuntu 24.04.3 on a newly built system having two
> 4TB Samsung M.2 SSDs which will be mirrored using RAID-1.  My question is
> what is the better way to set up the mirror.  I'll have 128GB of RAM and
> will be using a swapfile after installation.
>
> Method #1: After the UEFI partition is created on both disks, create GPT
>             /boot, / and /home partitions on each SSD and then create
> 	   three separate mirrors:
>
> 	   md0: /boot
>
> 	   md1: /
>
> 	   md2: /home
>
> Method #2: After the UEFI partition is created on both disks, mirror md0
> 	   using the rest of the free space.  Then create GPT partitions
> 	   directly on the mirror:
>
> 	   md0p1: /boot
>
> 	   md0p2: /
>
> 	   md0p3: /home
>
> This will be a straightforward desktop workstation, with no encryption or
> support for multiple OS installs.  Are there advantages or possible pitfalls
> with either approach?
>
> I'm also considering eliminating the boot and home partitions and just
> using a single root partition which feels strange after using UNIX for over
> 40 years. From a raid perspective does this also have advantages/pitfalls?
>
> Thanks.
> --
> Jeffery Small

What about:

sda1 and sdb1 for EFI no raid sda2 and sdb2 RAID-10 with -f2 option 
(diffrent offset that gives double speed of read and single speed of write)

md0: LVM and on top of LVM you can create partitions with XFS 
filesystem. XFS allows you to realtime grow partitons.

-- 
---
Thanks
Adam Nieścierowicz

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