> Am 02.05.2023 um 16:45 schrieb Tim via users <users@lists.fedoraproject.org>:
> 
> Tim:
>>> Briefly looking at RAID information, there are things that should be
>>> unique, and there are some things that can be duplicated (not so sure
>>> that they should be, though).  Drive IDs would need to be unique for
>>> anything that uses IDs to differentiate one drive from other.  There's
>>> partition and volume IDs that are used for different purposes.
> 
> Peter Boy:
>> I agree. But it’s hard not to use  UIEDs and to ignore misconfigured
>> UUIDs. Many Fedora tools use UUID by default, e.g. Cockpit and - if I
>> remember correctly - dbus. Therefore, cloning a disc often ends up in
>> more work than cloning saves. 
> 
> Since my experience with RAID is minimal (using a motherboard with
> built-in hardware RAID that could not be shut-off on the drive ports I
> had to use), I assume that if a mirror drive dies, you swap it, and let
> the RAID do its own magic to incorporate the replacement drive into the
> system, it handles filling up the new drive with partitions and data
> from the other drive without cloning IDs.

Software Raid write various meta data on the drive. Therefor - as I understand 
the docs - you MUST NOT clone the drive. I use SW Raid on my private servers 
only, and luckily I had not so much drive failures so far. But SW Raid restored 
the drive on its own when I tested it a while ago. However, according to my 
memory, I had created a (empty) partition table. I don't remember if that was 
necessary or if it just happened.





--
Peter Boy
https://fedoraproject.org/wiki/User:Pboy
p...@fedoraproject.org

Timezone: CET (UTC+1) / CEST (UTC+2)


Fedora Server Edition Working Group member
Fedora docs team contributor
Java developer and enthusiast


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