Linux - ServerThis forum is for the discussion of Linux Software used in a server related context.
Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.
Having a problem logging in? Please visit this page to clear all LQ-related cookies.
Introduction to Linux - A Hands on Guide
This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter.
For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own.
Click Here to receive this Complete Guide absolutely free.
Hi, I needed a little help or advice with my setup. I'm trying to
configure multipathed iscsi on a CentOS 5.4 (RHEL 5.4 clone) box.
Very short version: One server with two NICs for iSCSI sees storage on
EMC. Storage shows up as four discs, but only one works.
So far single connections work: If I setup the box to use one NIC, I
get one connection and can use it just fine.
When I setup multiple connections I have problems...
I created two interfaces, and assigned each one to a NIC
iscsiadm -m iface -I iface0 --op=new
iscsiadm -m iface -I iface0 --op=update -n iface.net_ifacename -v eth2
iscsiadm -m iface -I iface1 --op=new
iscsiadm -m iface -I iface1 --op=update -n iface.net_ifacename -v eth3
Each interface saw two paths to their storage, four total, so far so good.
I logged all four of them them in with:
iscsiadm -m node -T <long ugly string here> -l
I could see I was connected to all four via
At this point, I thought I was set, I had four new devices
/dev/sdb /dev/sdc /dev/sdd /dev/sde
Ignoring multipath at this point for now, here's where the problem
started. I have all four devices, but I can only communicate through
one of them: /dev/sdc.
As a quick test I tried to fdisk all four partitions, to see if I saw
the same thing in each place, and only /dev/sdc works.
Turning on multipath, I got a multipathed device consisting of sdb sdc
sdd and sde, but sdb sdd and sde are failed with a message of
checker msg is "emc_clariion_checker: Logical Unit is unbound or LUNZ"
I'm in the dark here. Is this right? Obviously wrong?