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Hi all, 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: defaults { udev_dir /dev max_fds 8192 user_friendly_names yes } blacklist { # System disks device { vendor ATA product * } device { vendor SAMSUNG product * } } multipaths { multipath { wwid 12340000004ea0984ee33874712347238 alias test_vol1 } } devices { device { vendor "DELL" product "MD36xxf" path_grouping_policy group_by_prio prio rdac polling_interval 5 path_checker rdac path_selector "round-robin 0" hardware_handler "1 rdac" failback immediate #features "2 pg_init_retries 50" no_path_retry 30 rr_min_io 100 prio_callout "/sbin/mpath_prio_rdac /dev/%n" getuid_callout "/lib/udev/scsi_id --whitelisted --device=/dev/%n" } } |