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Full Discussion: Presenting current LUNs to new OS. RHEL 7, LVM
Top Forums UNIX for Advanced & Expert Users Presenting current LUNs to new OS. RHEL 7, LVM Post 303039382 by hburnswell on Wednesday 2nd of October 2019 03:20:12 PM
Old 10-02-2019
Presenting current LUNs to new OS. RHEL 7, LVM
All,

We have a physical server (Lenovo 3950) that we need to upgrade the OS from RHEL 6 to RHEL 7. We do not want to do an in-place upgrade but rather start with a fresh OS install. The plan is to remove the two local drives (Raid 1) and install two new drives for the fresh RHEL 7 install. The idea being we can put the original drives back in the server if anything goes wrong. This part is pretty straight forward, but our question concerns the presentation of the LUNs that are used for the database (SAP HANA) on the old OS.

After the installation of the OS we will want to present snapshots of the original LUNs to the new RHEL 7 system. The LUNs reside on an EMC Xtreme IO array. The LUNs have LVM VGs and LVs with XFS filesystems. We would like to understand what we should expect with the LUNs presented to the new OS.

- Would this process be as simple as using the same /etc/fstab line from the old OS in the new OS and it recognize the LVM configuration and data as before? We are defining the mount via UUID on the current RHEL 6 OS.

- Do we need to or would it be better practice to do some type of lvconvert (mirror) or similar on the new OS? I recall doing a "mklvcopy" for this type of need in AIX, similar in RHEL 7?

We are going to test this in a sandbox environment but any guidance or any advise from experience would be greatly appreciated.

Thanks in advance,

HB
 

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yum-builddep

yum-builddep(1) 														   yum-builddep(1)

NAME

       yum-builddep - install missing dependencies for building an RPM package

SYNOPSIS

       yum-builddep package

DESCRIPTION

       yum-builddep  is a program which installs the RPMs needed to build the specified package.  The source RPM for the specified package must be
       available in a Yum repository (which will be automatically enabled, if it is disabled) or it can be a local source RPM file.

EXAMPLES

       Download and install all the RPMs needed to build the kernel RPM:
	      yum-builddep kernel

FILES

       As yum-builddep uses YUM libraries for retrieving all the information, it relies on YUM configuration for its  default  values  like  which
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SEE ALSO

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       http://yum.baseurl.org/

AUTHORS

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BUGS

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Panu Matilainen 						   17 July 2005 						   yum-builddep(1)
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