> Surely there is some way to tell device-mapper to leave things alone?
> I simply need four drives that I can use as four separate units - no
> RAIDing, nothing fancy, but this it seems impossible to tell the OS
> that...
>
Did you try blacklisting in /etc/multipath.conf?
I don't know which keyword for your setup - either blacklist or
devnode_blacklist.
Something like this should work:
devnode_blacklist {
devnode "^sd[a-d]$"
}
_or_
blacklist {
devnode "^sd[a-d]$"
}
To blacklist everything use devnode "*".
To verify the blacklist use the multipath command:
# multipath -d -v3 | grep sd
sda: blacklisted
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