I'm running multipath-tools on RHEL AS 4 update1.
I have 2 qlogic 2340 cards (qlogic multipathing disabled) attached to a
Sun StorEdge 3510 w/ dual controllers.
Multipathing appears to be working well. The devs are created
in /dev/mapper, kpartx creates the partitons, and multipath -l reports
multiple paths to a single device. I created an ext3 fs on a
multipathed dev and mounted it. To test, I ran a script to generate
constant i/o to the fs then pulled the fiber cable from one of the
qlogic cards. At this point, things still look good. My log reports...
Jan 10 14:15:01 v20z-d kernel: SCSI error : <4 0 0 4> return code =
0x10000
Jan 10 14:15:01 v20z-d kernel: end_request: I/O error, dev sdo, sector
5207
Jan 10 14:15:01 v20z-d kernel: device-mapper: dm-multipath: Failing path
8:224.
multipath -l shows a failed and active path for the device and the
script is still successfully generating i/o. The problem occurs when I
plug the fiber cable back in. My log reports...
Jan 10 14:15:53 v20z-d kernel: qla2300 0000:02:05.0: LIP reset occured
(f7f7).
Jan 10 14:15:53 v20z-d kernel: qla2300 0000:02:05.0: LIP occured (f7f7).
Jan 10 14:15:53 v20z-d kernel: qla2300 0000:03:01.0: LIP reset occured
(f7f7).
Jan 10 14:15:54 v20z-d kernel: qla2300 0000:02:05.0: LIP reset occured
(f8f7).
Jan 10 14:15:54 v20z-d kernel: qla2300 0000:03:01.0: LIP occured (f7f7).
Jan 10 14:15:54 v20z-d kernel: qla2300 0000:02:05.0: LIP occured (f8f7).
Jan 10 14:15:54 v20z-d kernel: qla2300 0000:03:01.0: LOOP UP detected (2
Gbps).
Jan 10 14:15:54 v20z-d kernel: SCSI error : <3 0 0 4> return code =
0x20000
Jan 10 14:15:54 v20z-d kernel: end_request: I/O error, dev sdf, sector
2952647
Jan 10 14:15:54 v20z-d kernel: device-mapper: dm-multipath: Failing path
8:80.
Jan 10 14:15:54 v20z-d kernel: end_request: I/O error, dev sdf, sector
2952655
Jan 10 14:15:54 v20z-d kernel: printk: 10821 messages suppressed.
Jan 10 14:15:54 v20z-d kernel: Buffer I/O error on device dm-9, logical
block 369074
Jan 10 14:15:54 v20z-d kernel: lost page write due to I/O error on dm-9
Jan 10 14:15:54 v20z-d kernel: Buffer I/O error on device dm-9, logical
block 369075
Jan 10 14:15:54 v20z-d kernel: lost page write due to I/O error on dm-9
there are many more of these errors and it ends w/...
Jan 10 14:15:55 v20z-d kernel: SCSI error : <3 0 0 4> return code =
0x20000
Jan 10 14:15:55 v20z-d kernel: end_request: I/O error, dev sdf, sector
1570127
Jan 10 14:15:55 v20z-d kernel: Aborting journal on device dm-9.
Jan 10 14:15:55 v20z-d kernel: ext3_abort called.
Jan 10 14:15:55 v20z-d kernel: EXT3-fs error (device dm-9):
ext3_journal_start_sb: Detected aborted journal
Jan 10 14:15:55 v20z-d kernel: Remounting filesystem read-only
I've tried a few different options in multipath.conf to no avail.
Here's what it looked like when these errors were generated...
defaults {
multipath_tool "/sbin/multipath -v0"
udev_dir /dev
polling_interval 120
default_selector "round-robin 0"
default_path_grouping_policy multibus
#
# From StorEdge 3510 section
default_path_checker tur
#
default_getuid_callout "/sbin/scsi_id -g -u -s /block/%n"
default_prio_callout "/bin/true"
default_features "0"
rr_wmin_io 100
failback immediate
}
software versions...
device-mapper-1.01.01-1.RHEL4
device-mapper-multipath-0.4.5-6.0.RHEL4
udev-039-10.8.EL4
kernel version - 2.6.9-11.EL
Any help would be greatly appreciated.
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