Archive for the ‘san’ Category

Another take on Dynamic Volume Resize in RHEL 6

Being able to resize an LVM volume without reboot is quite handy. I had described one way here. This is a slightly different take on the same topic, this time on RHEL 6. I had resized /dev/sdb from 48GB to 140GB in vCenter. However, the operating system is still seeing the old size: [root@build ~]# […]

Posted on December 17, 2013 at 09:37 by somedude · Permalink · Leave a comment
In: centos, fibre channel, linux, linux tips, lvm2, san, storage

Dynamically discovering disk volume in RedHat

This is one of those “note to myself” posts. Discovering a new volume on a Linux server is little cruder than it is in Solaris. Obviously, you have to provision a LUN on the storage. I have never tried it but I suppose you could use /usr/bin/ script from sg3_utils package. Anyway, then you need […]

Posted on April 28, 2013 at 16:18 by somedude · Permalink · Leave a comment
In: centos, fibre channel, linux, linux tips, redhat, san, storage

Logging into Engineering Mode on Clariion Array

I have been playing around with a new Clariion array and it turns out that there is this thing call “Engineering Mode” that allows some extra functionality. It is especially useful when connecting hosts manually. Normally, PowerPath takes care of host registration on the array, but I am using Sun’s Leadville drivers, so I have […]

Posted on December 8, 2010 at 16:55 by somedude · Permalink · 2 Comments
In: clariion, san, storage

Solaris 10 VTOC weirdness on EMC Clariion Array

I was doing some Solaris 10 8/07 testing with EMC Clariion CX4-960 array. One of the tests was to dynamically grow LUN. Until now, I have been doing this on HP EVA array. It was pretty straight forward: Grow the LUN on the array itself On the server use type subcommand of the format utility […]

Posted on July 19, 2010 at 10:33 by somedude · Permalink · Leave a comment
In: clariion, mpxio, multipathing, san, solaris, solaris tips, storage

Linux multipathing

I use MPxIO in Solaris quite often and it works very well for me. This time I needed to test out I/O multipathing in RedHat. What I really needed to do: have a server with two HBA’s manage a mirror which has submirrors on separate SAN’s; so that the server has multiple paths to each […]

Posted on November 27, 2009 at 22:40 by somedude · Permalink · Leave a comment
In: centos, fibre channel, hp eva, linux, linux tips, multipathing, redhat, san, storage