I have a new dell md3600f ( 2 controller ) fiber channel storage, two qlogic 2560 single port HBAs and two brocade 300 switches. FC cables are redundant connected between switches and storage controllers.
I have installed multipath-tools and configured my multipath.conf file. I couldn't find and understand the "mpath_prio_rdac" file. There isn't the file on the disk and repos.
What / Where is the file?
The multipath software and failover mechanism are work fine. But I get lot of failures at computer boot time and when after down/up the switch port. These failures are shown as "Buffer I/O error on device sdc, logical block" in kern.log but there is no problem on runtime and I can access to the all disk volume on the storage.
My system is debian/squeeze. How can I solve this problem?
The multipath.conf file content is below:
# System disks
path_selector "round-robin 0"
hardware_handler "1 rdac"
#features "2 pg_init_retries 50"
prio_callout "/sbin/mpath_prio_rdac /dev/%n"
getuid_callout "/lib/udev/scsi_id --whitelisted --device=/dev/%n"
* @author Atıf CEYLAN
* Software Developer & System Admin