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Display and setup procedures of
dev_loss_tmo
[Function] Display of dev_loss_tmo
[Syntax]
<display>
cat /sys/class/fc_remote_ports/rport-xxxx/dev_loss_tmo
Since dev_loss_tmo exists for every SCSI target, the character string which goes into the
portion of "xxxx" with a SCSI target changes.
Please display the dev_loss_tmo parameter of each SCSI target to check dev_loss_tmo to
two or more SCSI targets.
[Function] Setup of dev_loss_tmo
[Syntax]
<Setup>
echo <setup value> > /sys/class/fc_remote_ports/rport-xxxx/dev_loss_tmo
Since dev_loss_tmo exists for every SCSI target, the character string which goes into the
portion of "xxxx" with a SCSI target changes.
Please set the dev_loss_tmo parameter of each SCSI target to set up dev_loss_tmo to two
or more SCSI targets.
The value set up by this method is reset by the initial value (15) after reboot of OS.
Please execute "[Function] Setup of the initial value of dev_loss_tmo" to change an initial
value.
[Function] Setup of the initial value of dev_loss_tmo
[Syntax]
<Setup>
/opt/hitachi/drivers/hba/hfcmgr -E hfc_dev_loss_tmo <setup value>
After hfcmgr command execution, in order to reflect the setting, please update a RAMDISK
image in the procedure of "updating procedure of a RAMDISK image."
dev_loss_tmo changing by Device
mapper multipath
When you use Device mapper multipath in SLES11, Device mapper multipath may update
the value of dev_loss_tmo automatically after OS starting.
When the actual display of dev_loss_tmo differs from the value which you set as
dev_loss_tmo, please confirm a setup and operation of Device mapper multipath.
The configuration file of Device mapper multipath is /etc/multipath.conf.
The value of dev_loss_tmo may be updated by default operation of Device mapper
multipath even if it is a case where /etc/multipath.conf does not exist.
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