On Tue, Sep 4, 2018 at 11:03 PM <g.vasilopoulos@uoc.gr> wrote:

after upgrading to 4.20.39-1.el7 sas multipath stopped being detected

I did a diff to the two files

Is the current behaviour the correct one or the previous one ?
I think sas multipath should also be detected no ?

It should be detect it this is shared storage that you want to use in oVirt

It should not be detect if you have local disk using sas.

So we really cannot know.

[root@g1-car0136 etc]# diff multipath.conf multipath.conf.201809031555
1c1
< # VDSM REVISION 1.6
---
> # VDSM REVISION 1.5
101,109d100
< }
<
< # Whitelist FCP and iSCSI devices.
< blacklist {
< protocol ".*"
< }
<
< blacklist_exceptions {
< protocol "(scsi:fcp|scsi:iscsi)"

oVirt does not officially support sas, but this should work:

protocol "(scsi:fcp|scsi:iscsi|scsi:sas)"

The best way to configure it is to add a dropin configuration file:

$ cat /etc/multipath/conf.d/my.conf

blacklist_exceptions {

protocol "(scsi:fcp|scsi:iscsi|scsi:sas)"

}