Migrating LUNs to new storage array Post: 303038873

Sponsored Content

Operating Systems AIX Migrating LUNs to new storage array Post 303038873 by rbatte1 on Monday 16th of September 2019 07:57:15 AM

09-16-2019

Moderator

Just a thought (and trying to avoid downtime) can you not add the new LUNs into the VG and then migrate them with the server still live? I've done this very successfully and prevented needless hours of downtime (three weekends-worth)

The team I was helping to do this were very nervous and wanted the belt & braces approach so we:-

Added the new LUNs to the VG
Mirrored the LVs (no sync) and confirmed the layout was correct (not spread to old disks etc.)
Ran a syncvg and left if. Any problems, we would drop the new leaving the old intact.

When it had completed, we:-

Removed the mirror from the old/original disk
Removed the original disks from the volume group

Like I say, this was done with the server online and processing. The volume manager deals with this very well, and whilst it takes a long time to synchronise, it's probably no worse than waiting for something else to migrate the data. It is also reversible up to the point you commit by removing the mirror copies on the old disks.

Why do you not want to have both SANs connected at the same time? The usual arrangement is to have the SAN connections passed through a switch rather than direct to the AIX host. Is there a reason that you could not just add the new SAN connections to these switches?

I hope this gives you an alternative,
Robin

Last edited by rbatte1; 09-16-2019 at 09:03 AM..

rbatte1

View Public Profile for rbatte1

Visit rbatte1's homepage!

Find all posts by rbatte1

6 More Discussions You Might Find Interesting

1. Filesystems, Disks and Memory

Storage array question

We just purchased a MOD30 disk array strage system. We have 15 drives and 2 hot spares. We're running a database app with 8 data sets. I'm trying to get the best i/o speed out of my disk configuration. Right now I have 3 raid5 arrays setup. This seems to offer the same performance as having the...

2. Filesystems, Disks and Memory

how can I monitoring the LUNs in HP storage

Hi, How can i monitoring the LUN in HP Storage with korn shells? I would like to have a shell can monitoring the LUN, VGs, lvols and raw devices. Jesus

3. Solaris

storage array simulator

hi i haven't much experience in solaris. I would like to know about storage. how to configure,how it is working etc....can i get any simulator for doing these work? plaese send me the link . please help me advance thanks to all

4. HP-UX

HP Storage Array

hi I need to check status and configure HP Storage Array device. HP Storageworks P2000 Please suggest

5. UNIX for Advanced & Expert Users

VxVM breaking mirror for migrating storage

We are in the process of migrating storage from one array to another. I know the commands I would use in LVM but I am not very familiar with VxVM. The goal is to attach the new LUNs from the new array and add them to the disk group. Then mirror the data online to these new LUNs using VxVM...

6. Red Hat

Migrating an Oracle database storage - REDHAT4

e have a RHEL4 server with an Oracle 10 ( RAC ) are migrating storage bank records. The copy is made by the storage they make a copy of the level of disk all blocks are copied and the file permissions. Problems we had Initially the Cluster service was not rising due to absence of OCR disks...

LEARN ABOUT REDHAT

vgimport

VGIMPORT(8)						      System Manager's Manual						       VGIMPORT(8)

NAME

       vgimport - make volume groups known to the system

SYNOPSIS

       vgimport [-d|--debug] [-f|--force] [-h|--help] [-v|--verbose] VolumeGroupName PhysicalVolumePath [PhysicalVolumePath...]

DESCRIPTION

       vgimport  allows  you  to  make a volume group known to the system which has previously been exported (see vgexport(8) ) on this or another
       system.

   OPTIONS
       -d, --debug
	      Enables additional debugging output (if compiled with DEBUG).

       -f, --force
	      Force import of volume group even though it is not flagged exported.  This option allows the importing of volume groups from  broken
	      systems.

       -h, --help
	      Print a usage message on standard output and exit successfully.

       -v, --verbose
	      Display verbose runtime information about vgimport's activities.

Examples
       "vgimport  myvg	/dev/sd[b-h]5"	tries to make new volume group "myvg" known to the system. The previously exported volume group (see vgex-
       port(8) ) resides on disk partitions "/dev/sdb5" to "/dev/sdh5".

DIAGNOSTICS

       vgimport returns an exit code of 0 for success and > 0 for error:

       1  no volume group name on command line
       2  invalid volume group name
       3  no physical volume(s) on command line
       4  volume group already exists
       5  physical volume occurs mutiple times on command line
       6  invalid physical volume name
       7  error reading physical volume
       8  physical volume is not exported
       9  error reallocating memory
       10 error allocating memory
       11 no valid physical volumes found
       12 physical volume belongs to a different exported volume group
       13 wrong number of physical volumes
       14 error reading VGDA from disk(s)
       15 VGDA is inconsistent
       16 invalid logical volume count
       17 error getting a free volume group number
       18 error writing VGDA to physical volumes
       19 error creating VGDA in kernel
       20 error inserting volume group into lvmtab
       21 error doing backup of VGDA to disk
       22 error storing VGDA in lvmtab
       23 not enough free logical volume manager block specials available

       95 driver/module not in kernel
       96 invalid I/O protocol version
       97 error locking logical volume manager
       98 invalid lvmtab (run vgscan(8))
       99 invalid command line

Example
       "vgimport this_import /dev/sdk3 /dev/sdj4" tries to import a volume group contained on both partitions. The volume  group  this_import  may
       not already exit. You have to specify all physical volumes belonging to the exported volume group.

See also
       lvm(8), lvcreate(8)

AUTHOR

       Heinz Mauelshagen <Linux-LVM@Sistina.com>

Heinz Mauelshagen						     LVM TOOLS							       VGIMPORT(8)