Asus DS300j G2 Series User Manual page 261

With a Fibre Channel switch, a dev_loss_tmo value set too small can result in loss of the path during failover/
failback.
Linux maintains the rports dev_loss_tmo value in the /sys/class/fc_remote_port/rport-xxxx/dev_loss_tmo file.
The Fibre Channel HBA driver sets this value at loading time.
To change the dev_loss_tmo value to the recommended 60 seconds, during runtime type the echo command:
echo 60 > /sys/class/fc_remote_port/rpot-1:0:0/dev_loss_tmo
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aMple MultIpath Conf
Below is a complete multipath.conf file for ASUS DS300f G2.
• If you have no other multipath devices on your Host, you can use this multipath.conf file as shown.
• If you have other multipath devices, add these settings to your existing multipath.conf file.
##
## This is a template multipath-tools configuration file
## for the ASUS Storage ASUS DS300f G2 subsystem
##
defaults {
user_friendly_names yes
}
blacklist {
devnode "^sda$"
devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
devnode "^hd[a-z][[0-9]*]"
devnode "^cciss!c[0-9]d[0-9]*[p[0-9]*]"
}
devices {
device {
vendor "ASUS Storage"
product "ASUS DS300f G2"
path_grouping_policy multibus
getuid_callout "/sbin/scsi_id -g -u -s /block/%n"
path_checker readsector0
path_selector "round-robin 0"
hardware_handler "0"
failback immediate
rr_weight uniform
rr_min_io 100
no_path_retry 20
features "1 queue_if_no_path"
product_blacklist " ASUS DS300f G2 V-LUN"
}
}
DS300f G2 Series User Manual
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