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The chdev command may be used to change the reservation policy, as follows, shown for hdisk Failed mpio path on AIX5. Notify me iax new posts via email. Run smitty aux and do preview installation and check if everything is fine, if yes then install those 3 packages in one round. Here is quick summarize of all AIX tunable settings: By continuing to use this website, you agree to their use.

I think there has been a confusion in the process because you are using two FCs to connect to a SAN boot device hdisk0 If a reboot didn’t solve the problem try the following: Last 24 Hour s: Provide a reason sddpdm quarantining this blog entry optional: The bosboot command will rebuild the boot image. I just switched 9 servers last weekend from aix default pcm to sddpcm, and this was the first time I’d built a server from one of those mksysbs.


Need Help with SDD / SDDPCM / MPIO

Students Click Here Join Us! This works fine at AIX5. Copy the device driver file from another system that has the same release level as your system, either through the network by running the ftp command, or through a diskette by using the backup and restore commands. The disk must not be ssddpcm for that command to work as shown.

Multipathing configuration maximums for IBMSystem p hosts

Find the duplicate idea: It has nothing to do aid how many ports one adapter has. Performance achieved using CIO is comparable to raw-devices — no Inode locking. You also need to know how many disks you have per hdisk. By joining you are opting in to receive e-mail.

AIX will therefore create 4 different hdisk-devices when you run cfgmgr. You can use this super-device to build VGs, LVs and all other sorts of things you use normally disks for. FC drives usually have a queue depth of There are three pcmpath commands that offer this feature: In short words, V for example have 8 paths but he is using only 4 of them even if its active-active configuration.


A “path” is just a way of looking at one disk. Email required Address never made public. Register now while it’s still free! Red Flag This Post Please let us know here why this post is inappropriate. You are commenting using sddppcm Facebook account.

Notify me of new comments via email. For the change to take effect the system must be rebooted.

You are commenting using your WordPress. The short answer is, a “path” is a certain connection from the system to the disk, using a specific way. Choose between 2 LVM stripe modes: The elevator analogy is appropriate. Mount option — for oracle you should choose CIO: