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At─▒f CEYLAN 09-30-2011 01:56 PM

Dell MD3600F
 
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"

┬*┬*┬*┬*┬*┬*┬* }

}





--

/**

* @author At─▒f CEYLAN

* Software Developer & System Admin

* http://www.atifceylan.com

*/


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