Topic
2 replies Latest Post - ‏2010-06-28T08:37:53Z by SystemAdmin
SystemAdmin
SystemAdmin
706 Posts
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Pinned topic move from VIOS/vscsi to VIOS/NPIV attachment

‏2010-06-24T12:25:04Z |
Hi,
we have a test system running RHEL 5.5 on a Power6 595. The disks are currently attached via a VIOS (external disks on DS8k) using vscsi devices.
Now we plan to move to NPIV attachment.

I have changed the LPAR config and removed the vscsi device and added NPIV adapters. We also changed the SAN & DS settings so that we can see the LUN from the LPAR now. Unfortunately it doesn't boot:

Volume group 
"VolGroup00" not found mount: could not find filesystem 
'/dev/root'


Any ideas to solve this?
Thanks in advance for every response, Wolfgang
Updated on 2010-06-28T08:37:53Z at 2010-06-28T08:37:53Z by SystemAdmin
  • Brian_King
    Brian_King
    20 Posts
    ACCEPTED ANSWER

    Re: move from VIOS/vscsi to VIOS/NPIV attachment

    ‏2010-06-24T14:29:24Z  in response to SystemAdmin
    NPIV uses a different device driver to talk to the disk than virtual SCSI. This is most likely a case where the NPIV driver (ibmvfc) is not in the initrd, so does not get loaded during boot. To fix this, you need to revert to the virtual SCSI configuration, then recreate the initrd with something like:

    mkinitrd --with=ibmvfc /boot/initrd-2.6.18-194.el5.img 2.6.18-194.el5

    Then you can reconfigure to NPIV and this should hopefully resolve your issue.
    • SystemAdmin
      SystemAdmin
      706 Posts
      ACCEPTED ANSWER

      Re: move from VIOS/vscsi to VIOS/NPIV attachment

      ‏2010-06-28T08:37:53Z  in response to Brian_King
      Hi,
      thank you for this tip. This solved my problem!
      Regards, Wolfgang