[x]
Posted via EE Mobile

Search, ask, and monitor your questions on the go with EE Mobile. Visit Experts Exchange from your mobile device and never be out of touch again.
Question
[x]
Attachment Details
[x]
The Solution Rating System

With so many solutions, how can you tell which solutions are most likely to help you and which ones are not? To provide you with a tool to use, we rate our solutions based on various elements that most accurately determine if a solution is a quality solution. To explain what factors affect the solution rating, here are the elements we take into consideration when formulating our solution rating.

  • The Grade of the Solution
  • The Zone Rank of the Expert Providing the Solution
  • The Number of Author and Expert Comments
  • The Number of Experts Contributing
  • The Feedback of the Community

Your Input Matters
Because of the way the system is set up, the most important variable in this equation is you. As a member of Experts Exchange, you are able to cast your vote on the quality of the solutions in regard to how complete, accurate, helpful and easy to understand each solution is. When you provide your feedback, each rating is adjusted accordingly. So, if you see a solution that has a poor rating that you think is a good solution, let us know by rating it. As you do, the rating will be adjusted and will become more accurate for other members of our site.

If you have any suggestions that you would like to make for our rating system, please ask a question in the Suggestions Zone of Community Support.

Thank you!
8.6

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

Asked by uayneb in HP-UX Unix, Storage Technology


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!
[+][-]10/11/09 08:38 AM, ID: 25546252Accepted Solution

View this solution now by starting your 30-day free trial. Setting up your free trial is quick, easy, and secure. We will return you to this solution, unlocked, when you're done.

About this solution

Zones: HP-UX Unix, Storage Technology
Sign Up Now!
Solution Provided By: tfewster
Participating Experts: 1
Solution Grade: A
 
[+][-]10/08/09 12:07 PM, ID: 25528965Author Comment

Often, when Experts are collaborating with members who have asked questions, they will request additional information about the problem. Askers respond with an author comment like this one.

Start your 30-day free trial to view this Author Comment or ask the Experts your question.

 
[+][-]10/12/09 08:48 PM, ID: 25556811Author Comment

Often, when Experts are collaborating with members who have asked questions, they will request additional information about the problem. Askers respond with an author comment like this one.

Start your 30-day free trial to view this Author Comment or ask the Experts your question.

 
[+][-]10/20/09 06:30 PM, ID: 25620150Author Comment

Often, when Experts are collaborating with members who have asked questions, they will request additional information about the problem. Askers respond with an author comment like this one.

Start your 30-day free trial to view this Author Comment or ask the Experts your question.

 
 
Loading Advertisement...
20091111-EE-VQP-92 - Hierarchy / EE_QW_3_20080625