Ubuntu Server Guide Changes, errors and bugs

Configuration File Defaults
Currently, the multipath configuration file ONLY includes a minor defaults section that sets the
user_friendly_names parameter to yes:
d e f a u l t s {
u s e r _ f r i e n d l y _ n a m e s y e s
}
This overwrites the default value of the user_friendly_names parameter.
All the multipath attributes that can set in the defaults section of the multipath.conf file can be found
HERE with an explanation of what they mean. The attributes are:
• verbosity
• polling_interval
• max_polling_interval
• reassign_maps
• multipath_dir
• path_selector
• path_grouping_policy
• uid_attrs
• uid_attribute
• getuid_callout
• prio
• prio_args
• features
• path_checker
• alias_prefix
• failback
• rr_min_io
• rr_min_io_rq
• max_fds
• rr_weight
• no_path_retry
• queue_without_daemon
• checker_timeout
• flush_on_last_del
• user_friendly_names
• fast_io_fail_tmo
• dev_loss_tmo
• bindings_file
• wwids_file
• prkeys_file
30

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• log_checker_err
• reservation_key
• all_tg_pt
• retain_attached_hw_handler
• detect_prio
• detect_checker
• force_sync
• strict_timing
• deferred_remove
• partition_delimiter
• config_dir
• san_path_err_threshold
• san_path_err_forget_rate
• san_path_err_recovery_time
• marginal_path_double_failed_time
• marginal_path_err_sample_time
• marginal_path_err_rate_threshold
• marginal_path_err_recheck_gap_time
• delay_watch_checks
• delay_wait_checks
• marginal_pathgroups
• find_multipaths
• find_multipaths_timeout
• uxsock_timeout
• retrigger_tries
• retrigger_delay
• missing_uev_wait_timeout
• skip_kpartx
• disable_changed_wwids
• remove_retries
• max_sectors_kb
• ghost_delay
• enable_foreign
Previously the multipath-tools project used to provide a complete configuration file with all
the most used options for each of the most used storage devices. Currently you can see all those
default options by executing sudo multipath −t. This will dump used configuration file including
all the embedded default options.