I'm setting up a CentOS 5 server that will be connected to an HP EVA4000. My previous experience is with an HP VA7400 and HP-UX. In HP-UX I can add "alternate paths" to a volume group in order to have redundant paths to the SAN via dual fiber channel HBAs just by either adding them with 'vgextend' or appending the appropriate PV paths when using 'vgcreate'. I tried doing something similar in CentOS with 'vgextend' and got some errors about duplicate PV ids. The LUN (a single one) I create on the EVA4000 show up on the CentOS box as /dev/sda, /dev/sdb, /dev/sdc, /dev/sdd. And when I partitioned /dev/sda so that I had /dev/sda1, I also saw that /dev/sdb1, /dev/sdc1 and /dev/sdd1 were automagically there. So I know that these extra devices reflect the dual fiber channel HBAs and the dual paths through our redundant fiber switches.
My question is... did I do this the right way? When I do a 'vgdisplay' now I get:
at the beginning of the expected output. I want to avoid having to test the redundancy by disconnecting the fiber if possible. And in all honesty I don't think this is the right way to set up redundant paths on CentOS (or any other Linux distro for that matter). I think the "alternate paths" functionality is specific to HP-UX's implementation of LVM. But I suspect there is a "right way" to do alternate paths on Linux for redundancy.
Last edited by deckard; 08-10-2007 at 11:16 AM..
Reason: Forgot code tags...
I have a script that i need to run from different paths.
for example
mypc/path1/path2/,
mypc/path1/path2/path3/, and
mypc/path1/path2/path3/path4
How do i set up that script so that it can execute in any
of the above paths or how can i make it run on any path on my computer?? (5 Replies)
How do i find files in more than one directory? I searched through forums, but could not land into the right thread.
I tried something like
find dir1|dir2 -name file1
but it doesn't work. Please suggest. (5 Replies)
Hi all
Right, Im a little bit thick when it comes to SAN :-) IVe got a dual port qlc in a solaris 10 server. Its all connected and I can see a number of disks. The SAN guy here has asked me about preferred paths, i.e. as the dual ports are connected to two fabrics, etc device will have 4... (2 Replies)
Hey everyone.
I am working on designing a logging solution for a deployment we have going out in a few months. Right now we have a single storage head end, connected via fibre to a SAN. Basically the plan is to create a number of smaller LUNs on the SAN, and then use LVM2 to handle concatenating... (5 Replies)
Hello All,
We have a script which when run on the host gives us the status of the internal and SAN attached disks, its paths and other information. The output of which is as follows:
Nm DEVICE VEND PROD LunID SYM DevID DISKGROUP SIZE N E... (3 Replies)
I need to update about 2400 files in a directory subtree, with a new directory path inside the files
I need to change this occurence in all files: /d2/R12AB/VIS/apps/tech_st/10.1.2
with this: /u01/PROD/apps/apps_st/10.1.3
I know how to change single words using "find . -type f -print0 |... (6 Replies)
Hi ,
I am a newbie!!!
I want to develop a script for deleting files older than x days from multiple paths. Now I could reach upto this piece of code which deletes files older than x days from a particular path. How do I enhance it to have an input from a .txt file or a .dat file? For eg:... (12 Replies)
I am working on a script for Mac OS X that, among many other things, gets a list of all the installed Applications. I am pulling the list from the system_profiler command and formatting it using grep and awk. The problem is that I want to be able to use each result individually later in the script.... (3 Replies)
HACMP two-node cluster with mirrored LVM.
HACMP two-node cluster with two SAN storages mirrored using LVM. Configured 2 disk heartbeat networks - 1 per each SAN storage. While performing redundancy tests. Once one of SAN storage is down - cluster is going to ERROR state. What are the guidelines... (2 Replies)
if I have these wildcards to download from:
path1/*.txt
path2/*.txt
path3/*.txt
path4/*.txt
path5/*.txt
under a link such as this:
http://abc .com/]abc.com
Can wget be written in such a way to extract only those files and create the corresponding paths under a target folder? So the... (4 Replies)
Discussion started by: Devyn
4 Replies
LEARN ABOUT V7
vgimportclone
VGIMPORTCLONE(8) System Manager's Manual VGIMPORTCLONE(8)NAME
vgimportclone - import and rename duplicated volume group (e.g. a hardware snapshot)
SYNOPSIS
vgimportclone [-n|--basevgname VolumeGroupName] [-i|--import] PhysicalVolume [PhysicalVolume...]
DESCRIPTION
vgimportclone is used to import a duplicated VG (e.g. hardware snapshot). Duplicate VG(s) and PV(s) are not able to be used until they are
made to coexist with the origin VG(s) and PV(s). vgimportclone renames the VG associated with the specified PV(s) and changes the associ-
ated VG and PV UUIDs.
OPTIONS
See lvm for common options.
-n|--basevgname VolumeGroupName
By default the snapshot VG will be renamed to the original name plus a numeric suffix to avoid duplicate naming (e.g. 'test_vg'
would be renamed to 'test_vg1'). This option will override the base VG name that is used for all VG renames. If a VG already
exists with the specified name a numeric suffix will be added (like the previous example) to make it unique.
-i|--import
Import exported Volume Groups. Otherwise VGs that have been exported will not be changed (nor will their associated PVs).
ENVIRONMENT VARIABLES
LVM_BINARY
The LVM2 binary to use. Defaults to "lvm".
EXAMPLES
The origin VG vg00 has origin PVs /dev/sda and /dev/sdb and the respective snapshot PVs are /dev/sdc and /dev/sdd. To rename the VG asso-
ciated with /dev/sdc and /dev/sdd from vg00 to vg00_snap (and to change associated VG and PV UUIDs) do:
vgimportclone --basevgname vg00_snap /dev/sdc /dev/sdd
SEE ALSO lvm(8)Red Hat, Inc. LVM TOOLS 2.02.95(2) (2012-03-06) VGIMPORTCLONE(8)