after a fresh, multipath -F and start of multipathd with -v 2 I see the following messages.
After starting multipathd I mounted /dev/mapper/vol1 and generated some simple I/O to it using dd
Aug 13 16:23:14.888 localhost kernel: device-mapper: multipath: Failing path 8:208.
Aug 13 16:23:14.000 localhost multipathd: 8:208: mark as failed
Aug 13 16:23:16.000 localhost multipathd: 8:208: reinstated
Aug 13 16:23:30.462 localhost kernel: device-mapper: multipath: Failing path 8:208.
Aug 13 16:23:30.000 localhost multipathd: 8:208: mark as failed
Aug 13 16:23:39.000 localhost multipathd: 8:208: reinstated
Aug 13 16:23:46.430 localhost kernel: device-mapper: multipath: Failing path 8:208.
Aug 13 16:23:46.000 localhost multipathd: 8:208: mark as failed
Aug 13 16:23:51.041 localhost kernel: device-mapper: multipath: Failing path 8:208.
Aug 13 16:23:51.000 localhost multipathd: 8:208: mark as failed
Aug 13 16:23:59.000 localhost multipathd: 8:208: reinstated
Aug 13 16:24:06.465 localhost kernel: device-mapper: multipath: Failing path 8:208.
Aug 13 16:24:06.000 localhost multipathd: 8:208: mark as failed
Aug 13 16:24:09.000 localhost multipathd: 8:208: reinstated
Thanks,
--
Stew
On Thu, Aug 13, 2009 at 12:42 PM, Moger, Babu <Babu.Moger@xxxxxxx> wrote:
Do you have /var/log/messages file for this problem?
Thanks
Babu Moger
> --
> -----Original Message-----
> From: dm-devel-bounces@xxxxxxxxxx [mailto:dm-devel-bounces@xxxxxxxxxx] On
> Behalf Of Stewart Smith
> Sent: Thursday, August 13, 2009 1:51 PM
> To: dm-devel@xxxxxxxxxx
> Subject: rdac path failure - Sun 6140
>
> Hello All,
>
> I am seeing many of these messages when my Sun 6140 array is under heavy
> I/O
> device-mapper: multipath: Failing path 8:208.
> device-mapper: multipath: Failing path 8:208.
> device-mapper: multipath: Failing path 8:208.
> device-mapper: multipath: Failing path 8:208.
> device-mapper: multipath: Failing path 8:208.
>
>
> I am running a Fedora 10 server, with two fiber connections to two
> different switches. Both controllers on the 6140 have one connection
> to each switch as well. The end result is that I see four paths to
> each LUN.
>
> When the volume is mounted and under significant load I see the
> messages above every few seconds. They seem to appear every
> "no_path_retry" seconds.
>
> The 6140 controller firmware is up to date at version 07.50.08.10 and
> I have installed the latest firmware for my Emulex LPe11002 cards. I
> have reproduced the problem using both Cisco MDS and Brocade fiber
> channel switches as well.
>
> Using CAM, I have set the initiator Host Type to "Linux" at the
> moment. I have tried other options as well without success.
>
> I have NOT installed the RDAC drivers from either Sun or LSI -
> primarily because they do not seem to build on my Fedora 10 kernel.
>
> Any ideas would be greatly appreciated!!!
>
> configs and debugging multipathd output is below.
>
>
>
>
>
> Kernel: 2.6.27.24-170.2.68.fc10.x86_64
>
> # multipath -lll
> vol1 (3600a0b800048335200001e5d48b68a9b) dm-1 SUN,CSM200_R
> [size=12T][features=1 queue_if_no_path][hwhandler=1 rdac][rw]
> \_ round-robin 0 [prio=6][active]
> \_ 5:0:1:2 sdj 8:144 [active][ready]
> \_ 2:0:1:2 sdn 8:208 [active][ready]
> \_ round-robin 0 [prio=0][enabled]
> \_ 2:0:0:2 sdb 8:16 [active][ghost]
> \_ 5:0:0:2 sdd 8:48 [active][ghost]
>
>
> # cat /etc/multipath.conf
>
> blacklist {
> devnode "^sd[a-z][[0-9]*]"
> devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
> devnode "^hd[a-z][0-9]*"
> devnode "^cciss!c[0-9]d[0-9](p[0-9]*)*"
> }
>
> defaults {
> udev_dir /dev
> polling_interval 10
> selector "round-robin 0"
> path_grouping_policy multibus
> getuid_callout "/sbin/scsi_id --whitelisted /dev/%n"
> prio alua
> path_checker readsector0
> rr_min_io 100
> max_fds 8192
> rr_weight priorities
> failback immediate
> no_path_retry fail
> user_friendly_names yes
> }
> devices {
> device {
> vendor "SUN"
> product "CSM200_R"
> product_blacklist "Universal Xport"
> getuid_callout "/sbin/scsi_id --whitelisted
> /dev/%n"
> features "0"
> hardware_handler "1 rdac"
> path_selector "round-robin 0"
> path_grouping_policy group_by_prio
> failback immediate
> rr_weight uniform
> no_path_retry queue
> rr_min_io 1000
> path_checker rdac
> prio rdac
> }
> }
>
> multipaths {
> multipath {
> wwid 3600a0b800048335200001e5d48b68a9b
> alias vol1
> rr_weight priorities
> no_path_retry 5
> rr_min_io 100
> }
> }
>
>
>
> # multipathd -d v3
>
>
> Aug 13 14:48:53 | sdb: ownership set to vol1
> Aug 13 14:48:53 | sdb: not found in pathvec
> Aug 13 14:48:53 | sdb: mask = 0xc
> Aug 13 14:48:53 | sdb: path checker = rdac (controller setting)
> Aug 13 14:48:53 | sdb: state = 4
> Aug 13 14:48:53 | sdb: rdac prio = 0
> Aug 13 14:48:53 | sdd: ownership set to vol1
> Aug 13 14:48:53 | sdd: not found in pathvec
> Aug 13 14:48:53 | sdd: mask = 0xc
> Aug 13 14:48:53 | sdd: path checker = rdac (controller setting)
> Aug 13 14:48:53 | sdd: state = 4
> Aug 13 14:48:53 | sdd: rdac prio = 0
> Aug 13 14:48:53 | sdj: ownership set to vol1
> Aug 13 14:48:53 | sdj: not found in pathvec
> Aug 13 14:48:53 | sdj: mask = 0xc
> Aug 13 14:48:53 | sdj: path checker = rdac (controller setting)
> Aug 13 14:48:53 | sdj: state = 2
> Aug 13 14:48:53 | sdj: rdac prio = 3
> Aug 13 14:48:53 | sdn: ownership set to vol1
> Aug 13 14:48:53 | sdn: not found in pathvec
> Aug 13 14:48:53 | sdn: mask = 0xc
> Aug 13 14:48:53 | sdn: path checker = rdac (controller setting)
> Aug 13 14:48:53 | sdn: state = 2
> Aug 13 14:48:53 | sdn: rdac prio = 3
> Aug 13 14:48:53 | vol1: pgfailback = -2 (controller setting)
> Aug 13 14:48:53 | vol1: pgpolicy = group_by_prio (controller setting)
> Aug 13 14:48:53 | vol1: selector = round-robin 0 (controller setting)
> Aug 13 14:48:53 | vol1: features = 0 (controller setting)
> Aug 13 14:48:53 | vol1: hwhandler = 1 rdac (controller setting)
> Aug 13 14:48:53 | vol1: rr_weight = 2 (LUN setting)
> Aug 13 14:48:53 | vol1: minio = 100 (LUN setting)
> Aug 13 14:48:53 | vol1: no_path_retry = 5 (multipath setting)
> Aug 13 14:48:53 | pg_timeout = NONE (internal default)
> Aug 13 14:48:53 | vol1: set ACT_CREATE (map does not exist)
> create: vol1 (3600a0b800048335200001e5d48b68a9b) n/a SUN,CSM200_R
> [size=12T][features=0][hwhandler=1 rdac][n/a]
> \_ round-robin 0 [prio=6][undef]
> \_ 5:0:1:2 sdj 8:144 [undef][ready]
> \_ 2:0:1:2 sdn 8:208 [undef][ready]
> \_ round-robin 0 [prio=0][undef]
> \_ 2:0:0:2 sdb 8:16 [undef][ghost]
> \_ 5:0:0:2 sdd 8:48 [undef][ghost]
>
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