multipath: failed to set dev_loss_tmo

[dea]

Hi !!

I use several fc/sas SAN.. but on IBM 1814 i've this error.
In /dev/mapper/device works, but path 1 and path 2 switch from ready to ghost, continuously, and this is not normal.
On /var/log/syslog I can see a multipath error:

failed to set /class/fc_remote_ports/rport-0:0-0/dev_loss_tmo

Any idea ?

PS, the configuration from multipath.conf is the standard for RDAC IBM 1814

Luca

 

[tom]

show the multipath.conf

 

[dea]

Hi Tom !

This is my settings :

**************
devices {
device {
vendor "IBM"
product "^1814"
path_grouping_policy group_by_prio
getuid_callout "/lib/udev/scsi_id --whitelisted --replace-whitespace --device=/dev/%n"
path_selector "round-robin 0"
path_checker rdac
features "0"
hardware_handler "1 rdac"
prio rdac
failback immediate
rr_weight uniform
no_path_retry queue
rr_min_io 1000
rr_min_io_rq 1
}
}
blacklist {
wwid *
}
blacklist_exceptions {
wwid "3600a0b80002add84000009a55268bbd8"
}
multipaths {
multipath {
wwid "3600a0b80002add84000009a55268bbd8"
alias ds4200
}
}
**************

 

[dea]

SOLVED ! Re: multipath: failed to set dev_loss_tmo

Another SAN BIOS configuration problem !!!

Set SAN BIOS as "Linux cluster" and works fine !
On another RDAC IBM model "Linux cluster" dosn't work, works as "Linux AVT"