On Mon, Sep 3, 2018 at 8:01 PM Fabrice Bacchella < fabrice.bacchella@orange.fr> wrote:

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.

If you SAS drives are attached to the host using FC or iSCSI, you are fine.

Nope, they are attached using SAS.

I guess oVirt see them as FCP devices? Are these disks connected to multiple hosts? Please share the output of: vdsm-client Host getDeviceList ... Where do I find the protocol multipath thinks the drives are using ? multipath.conf(5) says: The protocol strings that multipath recognizes are scsi:fcp, scsi:spi, scsi:ssa, scsi:sbp, scsi:srp, scsi:iscsi, scsi:sas, scsi:adt, scsi:ata, scsi:unspec, ccw, cciss, nvme, and undef. The protocol that a path is using can be viewed by running multipathd show paths format "%d %P" So this should work: blacklist_exceptions { protocol "(scsi:fcp|scsi:iscsi|scsi:sas)" } The best way to make this change is to create a dropin conf file, and not touch /etc/multipath.conf, so vdsm will be able to update later. $cat /etc/multipath/conf.d/local.conf blacklist_exceptions { protocol "(scsi:fcp|scsi:iscsi|scsi:sas)" } I hope it works for overriding vdsm configuration, if not, you will need to change /etc/multipath.conf, and mark it as VDSM_PRIVATE like this; $ head -3 /etc/multipath.conf # # VDSM REVISION 1.6 # VDSM PRIVATE Once it works, I suggest to file a bug to support sas disks by default. Nir