Le 3 sept. 2018 à 18:31, Nir Soffer <nsoffer@redhat.com> a écrit :

On Mon, Sep 3, 2018 at 5:07 PM Fabrice Bacchella <fabrice.bacchella@orange.fr> wrote:

In the release notes, I see:

• BZ 1622700 [downstream clone - 4.2.6] [RFE][Dalton] - Blacklist all local disk in multipath on RHEL / RHEV Host (RHEL 7.5)
Feature:
Blacklist local devices in multipath.

Reason:
multipath repeatedly logs irrelevant errors for local devices.

Result:
Local devices are blacklisted, and no irrelevant errors are logged anymore.

What defines a local disk ? I'm using a SAN on SAS. For many peoples, SAS is only for local disks, but that's not the case. Will other 4.2.6 will detect that ?

We don't have any support for SAS.

What you call SAS is any block device we might want to attach directly and let oVirt manage. I was doing the same thing on old HPE hardware, using old smart array controlers. I gave the raw device to ovirt. After an upgrade, it fails as it was

blacklisted. I need to add it  to the blacklist exceptions:

cat /etc/multipath/conf.d/enable-sas.conf 

blacklist_exceptions {

    protocol "cciss"

}

I think your default rule is quite hard, and can brake many existing setup:

multipathd show blacklist

...

protocol rules:

- blacklist:

        (config file rule) .*

- exceptions:

        (config file rule) (scsi:fcp|scsi:iscsi)

        (config file rule) cciss                  <-- mine