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Full Discussion: Normal VG to Enhanced Concurrent VG
Operating Systems AIX Normal VG to Enhanced Concurrent VG Post 302898894 by bakunin on Thursday 24th of April 2014 07:56:17 PM
Old 04-24-2014
What ibmtech told you is correct, just two things to add:

1. When you make changes to the VGs on one node you need to do a "learning import" of the respective VG on the other node:

Code:
importvg -L <vgname> <hdisk>

This needs to be done to synchronize VG information across nodes. Otherwise the next takeover might just fail.

2. For your VG to support ECC you need to have a storage underneath which supports concurrent access to the disks. Our old Clariion, for instance, did not.

I hope this helps.

bakunin
This User Gave Thanks to bakunin For This Post:
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LEARN ABOUT CENTOS

ehci

EHCI(4)                                                    BSD Kernel Interfaces Manual                                                    EHCI(4)

NAME

     ehci -- USB Enhanced Host Controller driver

SYNOPSIS

     device ehci

DESCRIPTION

     The ehci driver provides support for the USB Enhanced Host Controller Interface, which is used by USB 2.0 controllers.

     EHCI controllers are peculiar in that they can only handle the USB 2.0 protocol.  This means that they normally have one or more companion
     controllers (i.e., ohci(4) or uhci(4)) handling USB 1.x devices.  Consequently each USB connector is electrically connected to two USB con-
     trollers.  The handling of this is totally automatic, but can be noticed since USB 1.x and USB 2.0 devices plugged in to the same connector
     appear to connect to different USB busses.

SEE ALSO

     ohci(4), uhci(4), usb(4)

HISTORY

     The ehci device driver first appeared in FreeBSD 5.1.

BUGS

     The driver is not finished and is quite buggy.

     There is currently no support for isochronous transfers.

BSD                                                               March 20, 2005                                                               BSD
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