This issue is specific to SLES 11 operating system. As the parameter remove_on_dev_loss of the scsi_transport_fc module has been removed in SLES 11, the OS device files are removed after a device loss with dev_loss_tmo. When the device comes back online, the device names may have changed and DMP will then not recognize its status with the
Novell has released a kernel update on March 2, 2010 that allows users
to modify dev_loss_tmo value to up to 10 days. To utilize this
1. Download and upgrade to kernel 188.8.131.52-0.1.1 or later from
2. Create file /etc/udev/rules.d/40-rport.rules with the following
KERNEL=="rport-*", SUBSYSTEM=="fc_remote_ports", ACTION=="add",RUN+="/bin/sh -c 'echo 20 > /sys/class/fc_remote_ports/%k/fast_io_fail_tmo;echo 864000
3. Reboot the system.
NOTE# Users should run:
"udevadm trigger --action=add --subsystem-match=fc_remote_ports"
if new luns are dynamically assigned to the host.