troubleshooting Question

hp-ux 11iv3 multipath VERY SLOW .. hp rp3440 and ibm ds4300

Avatar of uayneb
uayneb asked on
Unix OSStorage
4 Comments1 Solution1757 ViewsLast Modified:

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,A9784A,AB378A/B,AB379A/B,AB465A,AD193A,AD194A,AD300A

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!
ASKER CERTIFIED SOLUTION
tfewster

Our community of experts have been thoroughly vetted for their expertise and industry experience.

Join our community to see this answer!
Unlock 1 Answer and 4 Comments.
Start Free Trial
Learn from the best

Network and collaborate with thousands of CTOs, CISOs, and IT Pros rooting for you and your success.

Andrew Hancock - VMware vExpert
See if this solution works for you by signing up for a 7 day free trial.
Unlock 1 Answer and 4 Comments.
Try for 7 days

”The time we save is the biggest benefit of E-E to our team. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange.

-Mike Kapnisakis, Warner Bros