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I am new to networking and am trying to implement power HA in an AIX environment. As a pre requisite I need my rootvg which is hdisk0 and another 3 additional hdisks, which will be hdisk1, hdisk2 & hdisk3. I am a little confused and wanted to know how I can add these hdisks in, is it a physical dick which needs to be added or can I create a dummy or something. When running the command lspv hdisk0 is returned.

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  • Do I request for the IT guy to add in physical disks in order to get them when the command lspv is run ? Apr 14, 2015 at 4:57
  • I want an output from lspv like this # lspv hdisk0 00c609e0a5ec1460 rootvg active hdisk1 00c609e037478aad None hdisk2 00c03b1a32e50767 None hdisk3 00c03b1a32ee4222 None Apr 14, 2015 at 5:02
  • but what I get is this # lspv hdisk0 00c0c356c313ed35 rootvg active Apr 14, 2015 at 5:03
  • Why do you need four PVs? Apr 14, 2015 at 5:03
  • Its listed as a pre requisite for running power HA, as I will need to assign resource groups to them. Apr 14, 2015 at 5:08

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To answer the original question. hdiskX devices on AIX represent physical disks, those physical disks can be internal disks (SCSI, SAS, etc) or SAN attached disks or virtual SCSI disks if you are using VIO virtualization. You cannot just create dummy hdiskX devices and expect Power HA to use them.
For you to be able to "see" the additional hdiskX devices in your server, you will need to physically add the drives to the server, or allocate additional SAN LUN's or virtual SCSI disks to it, and then run the cfgmgr command in AIX to discover them.

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