Migration of Oracle GI quorum disk to another diskgroup

Byetzion 28/06/201519/10/2019

When installing Oracle RAC (or in its more modern name – GI) version 11.2.0.1 and above, you can use Oracle ASM DiskGroup as your CRS+Voting file location.

It is fairly simple changing the disk membership in Oracle ASM DiskGroup, however, when you face some unknown bugs which prevent you from doing just that, or when you are required to modify the ASM DiskGroup on which the CRS+Voting files are placed, the article below is the one for you. You would have to remember, in addition, the ASM spfile.

So, as a reminder (which is one of the purposes of this blog), here’s a link to a very extensive article about how to migrate the CRS, Vote and spfile from one ASM DiskGroup to another: Migrate OCR to another DiskGroup

Clusters | Linux

Redhat Cluster NFS client service – things to notice

Byetzion 16/01/2009

I encountered an interesting bug/feature of RHCS on RHEL4. A snip of my configuration looks like this: <resources> <fs device=”/dev/mapper/mpath6p1″ force_fsck=”1″ force_umount=”1″ fstype=”ext3″ name=”share_prd” mountpint=”/share_prd” options=”” self_fence=”0″ fsid=”02001″/> <nfsexport name=”nfs export4″/> <nfsclient name=”all ro” target=”192.168.0.0/255.255.255.0″ options=”ro,no_root_sqush,sync”/> <nfsclient name=”app1″ target=”app1″ options=”rw,no_root_squash,sync”/> </resources> <service autostart=”1″ domain=”prd” name=”prd” nfslock=”1″> <fs ref=”share_prd”> <nfsexport ref=”nfs export 4″> <nfsclient ref=”all ro”/>…

Clusters | Linux

Oracle Clusterware as a 3rd party HA framework

Byetzion 12/06/2009

Oracle begin to push their Clusterware as a 3rd party HA framework. In this article we will review a quick example of how to do it. I will refer to this post as a quick-guide, as this is by no means any full-scale guide. This article assumes you have installed Oracle Clusterware following one of…

Clusters | Disk Storage | Oracle

Easily Replacing an AFD Disk in ASM DiskGroup

Byetzion 20/03/202320/03/2023

When using OracleASM in normal or high redundancy, a failed disk is nothing to be concerned with. However, when using AFD, there are several additional actions you need to take into account in order to replace the disk quickly and easily. It is imperative to understand that when using AFD, there are some unavoidable tasks…

Disk Storage

NetApp LUN Serial and SCSI Word 83

Byetzion 02/11/2014

I was wandering for a long while about the connection between NetApp’s LUN Serial and the identifier the host sees, aka “Word 83”. There was an obvious connection, but I figured it out only today. The LUN Serial is an ASCII representation of the hexadecimal Word 83, or, to be exact, the last 22 hex…

Disk Storage | General Hardware | Linux | Virtualization

XenServer 6.5 PCI-Passthrough

Byetzion 16/04/2015

While searching the web for how to perform PCI-Passthrough on XenServers, we mostly get info about previous versions. Since I have just completed setting up PCI-Passthrough on XenServer version 6. 5 (with recent update 8, just to give you some notion of the exact time frame), I am sharing it here. Hardware: Cisco UCS blades,…

Disk Storage | Scripting/Programming

Microsoft Exchange, data replication

Byetzion 27/11/2005

Here’s a little issue. If you were to replicate MS Exchange DB from one machine to another, how/what would you have done? The scenario goes as follows: You have your own domain, and you use, for your own core services AD and MS Exchange for the whole organization. While AD supports some built-in replication, so…

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