Hello, oVirt guru's ! I installed oVirt 4.0 on several servers HP ProLiant DL360 G5 with QLogic/Emulex 4G dual-port HBAs. These servers have multipath connection to the storage system HP 3PAR 7200. Before installing oVirt to servers I set up the configuration file /etc/multipath.conf according to the vendor recommendations from document "HPE 3PAR Red Hat Enterprise Linux and Oracle Linux Implementation Guide (emr_na-c04448818-9.pdf)" https://blog.it-kb.ru/2016/06/12/configuring-device-mapper-multipathing-dm-m... Before installing oVirt my multipath.conf was the: ---> start of /etc/multipath.conf <----- defaults { polling_interval 10 user_friendly_names no find_multipaths yes } blacklist { devnode "^cciss\/c[0-9]d[0-9]*" } multipaths { multipath { wwid 360002ac000000000000000160000cec9 alias 3par-vv2 } multipath { wwid 360002ac000000000000000170000cec9 alias 3par-vv1 } } devices { device { vendor "3PARdata" product "VV" path_grouping_policy group_by_prio path_selector "round-robin 0" path_checker tur features "0" hardware_handler "1 alua" prio alua failback immediate rr_weight uniform no_path_retry 18 rr_min_io_rq 1 detect_prio yes } } ---> end of /etc/multipath.conf <----- But after installing oVirt file multipath.conf has changed to: ---> start of /etc/multipath.conf <----- defaults { polling_interval 5 no_path_retry fail user_friendly_names no flush_on_last_del yes fast_io_fail_tmo 5 dev_loss_tmo 30 max_fds 4096 } devices { device { all_devs yes no_path_retry fail } } ---> end of /etc/multipath.conf <----- Now I'm not sure that this configuration is optimal. What do you advise?