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Re: bin/55383: lvm is called before raidframe
The following reply was made to PR bin/55383; it has been noted by GNATS.
From: mlelstv%serpens.de@localhost (Michael van Elst)
Subject: Re: bin/55383: lvm is called before raidframe
Date: Sat, 13 Jun 2020 08:39:58 -0000 (UTC)
> I have several raid volumes which do not autoconfigure for
> whatever reason, so I need to start raidframe. Might have had
> something to do with having higher-number raid volumes as sub-raids
> of the lower number (raid2 == raid20 + raid21)? I don't know.
Hierarchical RAID sets don't autoconfigure. Add autocnfig time, the driver
only searches disk partitions (and wedges) of type raid and assembles raid
sets from these. For hierarchical raids that process would need to recurse.
Most useful would be a mechanism that incrementally builds raid sets
and scans disks for raid compoments when they attach (like we scan
for wedges now). That would support hierarchical raids and also
support hot-plug disks. If that's not needed for the root, it could
be implemented as a devpubd hook. Of course devpubd should then run
Michael van Elst
"A potential Snark may lurk in every tree."
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