Visit Jeremy's Blog.
Go Back > Forums > Linux Forums > Linux - Virtualization and Cloud
User Name
Linux - Virtualization and Cloud This forum is for the discussion of all topics relating to Linux Virtualization and Linux Cloud platforms. Xen, KVM, OpenVZ, VirtualBox, VMware, Linux-VServer and all other Linux Virtualization platforms are welcome. OpenStack, CloudStack, ownCloud, Cloud Foundry, Eucalyptus, Nimbus, OpenNebula and all other Linux Cloud platforms are welcome. Note that questions relating solely to non-Linux OS's should be asked in the General forum.


  Search this Thread
Old 02-22-2010, 09:58 PM   #1
Registered: Jan 2010
Posts: 42

Rep: Reputation: 15
How do I force Xen to present same physical disk to multiple guests?

How do I force Xen to present physical devices to multiple guests simultaneously in read-write mode? (Read on before answering!)

I've got about 20 device files (multipath device files corresponding to SAN luns) on my physical host that I want presented read-write to three different guest OSes. By default, Xen tries to prevent me from doing this, which in many cases is understandable.

But what I want to do is legitimate. It's an Oracle environment, and any entity that's going to be writing to the devices in the guest OSes is cluster-aware, and will manage all of the reads/writes internally. This isn't going to be ext3. It will be a lot of OCFS2 and Oracle ASM.

Thanks in advance.
Old 02-22-2010, 10:18 PM   #2
Registered: Jan 2010
Posts: 42

Original Poster
Rep: Reputation: 15
Ah - looks like I found it. I used a '!' after the w in the 'phy' entry in the Xen config, and this seems to do what I need.

Any kinks I need to be aware of using this?


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Active volume groups and Xen guests jackpal Linux - Virtualization and Cloud 0 12-21-2009 03:01 PM
LXer: How To Enable Networking In Xen Guests On Hetzner's New EQ Servers (Debian Lenn LXer Syndicated Linux News 0 10-28-2009 10:41 AM
Cannot ping xen guests from external computer tjr856 Linux - Networking 3 06-04-2009 02:44 PM
LXer: How To Run Fully-Virtualized Guests (HVM) With Xen 3.2 On Debian Lenny (x86_64) LXer Syndicated Linux News 0 03-08-2009 08:30 AM
Only 4Gb usable RAM when 8Gb physical is present stokes Linux - Server 12 11-16-2007 06:14 AM > Forums > Linux Forums > Linux - Virtualization and Cloud

All times are GMT -5. The time now is 11:40 PM.

Main Menu
Write for LQ is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration