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hp-ux 11iv3 multipath VERY SLOW .. hp rp3440 and ibm ds4300
Hi there-
Have an hp-ux 11iv3 rp3440 with AB379-60101 dual port HBA hooked up to a HP Storageworks 4/8 San Switch hooked up to an IBM ds4300.
Basically the multipath is not working at all. I usually do quick tests of writing files
# dd if=/dev/zero of=1gigfile bs=1024 count=1000000
which takes anywhere between 15 to 30 seconds. In this case it takes over 10 minutes. When I pull the cable from the left port or the right port, it takes the 15 to 30 seconds. When both cables are plugged in it takes over 10 minutes
any ideas? Googled around a bit and tried a few things. Updated the driver to
FibrChanl-01 B.11.31.0909 FibrChnl;HW=A6826A,A9782A,
Also found that commonio was not installed on the system so downloaded and installed that.
Any ideas? I'm coming to my wit's end here.
I am not using pvlinks (that I know of). When I ran the ioscan it already showed the multipath to the disk. Here is the ioscan output:
# ioscan -f -n -N -C disk
Class I H/W Path Driver S/W State H/W Type Description
==========================
disk 3 64000/0xfa00/0x0 esdisk CLAIMED DEVICE HP 73.4GST373455LC /dev/disk/disk3 /dev/rdisk/disk3
disk 4 64000/0xfa00/0x1 esdisk CLAIMED DEVICE HP 73.4GST373455LC /dev/disk/disk4 /dev/rdisk/disk4
disk 5 64000/0xfa00/0x2 esdisk CLAIMED DEVICE TEAC DV-28E-C /dev/disk/disk5 /dev/rdisk/disk5
disk 46 64000/0xfa00/0xc esdisk CLAIMED DEVICE IBM 1722-600 /dev/disk/disk46 /dev/rdisk/disk46
# ioscan -f -n -C disk
Class I H/W Path Driver S/W State H/W Type Description
==========================
disk 2 0/0/2/0.0.0.0 sdisk CLAIMED DEVICE TEAC DV-28E-C /dev/dsk/c0t0d0 /dev/rdsk/c0t0d0
disk 0 0/1/1/0.0.0 sdisk CLAIMED DEVICE HP 73.4GST373455LC /dev/dsk/c2t0d0 /dev/rdsk/c2t0d0
disk 1 0/1/1/1.2.0 sdisk CLAIMED DEVICE HP 73.4GST373455LC /dev/dsk/c3t2d0 /dev/rdsk/c3t2d0
disk 6 0/3/1/0.1.7.0.0.0.0 sdisk CLAIMED DEVICE IBM 1722-600 /dev/dsk/c9t0d0 /dev/rdsk/c9t0d0
disk 30 0/3/1/1.1.7.0.0.0.0 sdisk CLAIMED DEVICE IBM 1722-600 /dev/dsk/c8t0d0 /dev/rdsk/c8t0d0
#
Any guesses?
Thanks in advance!
Unix OSStorage
Last Comment
uayneb
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ASKER
well, i basically left it as active active but changedd the load_bal_method to preferred path and gave one of the ports as the preferred path and that seemed to work.
Do you suggest I leave it as such or should i change to active/passive? (Or is it basically the same thing with HP-UX?)
Thanks for the tip!
Do you suggest I leave it as such or should i change to active/passive? (Or is it basically the same thing with HP-UX?)
Thanks for the tip!
ASKER
Also had to make sure that the active path went to the proper controller. I"m good now.
# scsimgr lun_map -D /dev/rdisk/disk46
LUN PATH INFORMATION FOR LUN : /dev/rdisk/disk46
Total number of LUN paths = 2
World Wide Identifier(WWID) = 0x600a0b80001980ae00005350
LUN path : lunpath35
Class = lunpath
Instance = 35
Hardware path = 0/3/1/1.0x200600a0b81984d5
SCSI transport protocol = fibre_channel
State = ACTIVE
Last Open or Close state = ACTIVE
LUN path : lunpath36
Class = lunpath
Instance = 36
Hardware path = 0/3/1/0.0x200700a0b81984d6
SCSI transport protocol = fibre_channel
State = ACTIVE
Last Open or Close state = ACTIVE
#
Should I change to active/standby? Why wouldn't active/active work?