Re: To partition or not to partition MD arrays (Was Re: smartctl cannotaccess my storage, need syntax help)

[Franco Martelli <martellif67@gmail.com>]

On 19/01/24 at 20:14, Nicolas George wrote:
> Franco Martelli (12024-01-19):
> > > One case against using partitions on mdraid: if your array gets messed
> > > up, you get to recreate those partition tables yourself and that's just
> > > hilarious if you don't have a backup. Happened to a friend of mine,
> > > reason was a UPS brownout.
> > How can I get a backup of mdadm RAID partition?
>
> You do not need a backup of the RAID partitions, that would be terribly
> inefficient. You need a backup of the partition table.

Yes, I agree of course. I was asking this to Anssi because it looks like 
strange to me to have the backup of the partitions, as he pointed (for 
my understanding)

> Which, if you are organized, you already have in
> $notes_dir/$hostname/install.md as something that looks like this:
>
> ```
> sudo sfdisk /dev/sdX <<EOF
> label: gpt
> unit: sectors
> sector-size: 512
> 1 : start=        2048, size=      129024, type=U, name="efi"
> 2 : start=      131072, size=   976640048, type=R, name="raid"
> EOF
> ```

The partitions table of my HDD is part of my backup.

Cheers,

--
Franco Martelli