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4.6. iSCSI and DM Multipath overrides
The
recovery_tmo
sysfs
option controls the timeout for a particular iSCSI device. The following options globally override recovery_tmo
values:
- The
replacement_timeout
configuration option globally overrides therecovery_tmo
value for all iSCSI devices. - For all iSCSI devices that are managed by DM Multipath, the
fast_io_fail_tmo
option in DM Multipath globally overrides therecovery_tmo
value. Thefast_io_fail_tmo
option in DM Multipath also overrides thefast_io_fail_tmo
option in Fibre Channel devices.The DM Multipathfast_io_fail_tmo
option takes precedence overreplacement_timeout
. Red Hat does not recommend usingreplacement_timeout
to overriderecovery_tmo
in devices managed by DM Multipath because DM Multipath always resetsrecovery_tmo
when themultipathd
service reloads.