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Wich HostType is correct for a RAW LUN in Physical Mode? If you've got support with VMware I'd contact them in the first instance as they have experience doing this. We tried using command line as per your guide above but we ran into issues with permissions as per some of the other comments above (even when using the root account). Reply → Joep Piscaer on October 16, 2011 at 14:22 Hi Jonathan, There simply isn’t a way to use a partition as an RDM. navigate here

As it's been mentioned above, host LUNID matching has been a best practice with ESX for a long time, but I've never known exactly why. For Microsoft Clustering Services, there are some extra caveats. But what is the VML, and how is it generated? Also, I’m beginning my preparations for the VCDX Design Exam (which I’m going to take at the end of February). https://kb.vmware.com/kb/1021187

Waiting For Timed Out Hb

Email check failed, please try again Sorry, your blog cannot share posts by email. Does anyone know why this setting is even there if it is possible to disable? We just did and it saved hours of problems! For instance, using Windows Server 2008 in a Failover Cluster scenario, you cannot use Virtual Compatibility mode.

So with an ssh open on the vmkernel log i should have try to detach and unmount those lun. When do you use a RDM? Reply Ed Grigson says: February 18, 2015 at 12:45 pm Can you clarify how you did this Kev? Partedutil Nick Reply Ed Grigson says: March 16, 2013 at 10:46 am Who are you logging in as Nicolas - root?

Compatibility with… Storage VMotion and cold migration A RDM can be included when you perform a Storage VMotion or cold migration. Lun Reset Command thanks Reply Peter says: October 5, 2012 at 1:17 pm Attempted using this and the delete command, both result in /dev/disks # partedUtil mklabel "/vmfs/devices/disks/t10.ATA_____WDC_WD1502FAEX2D007BA0________________________WD2DWMAY03053012" msdos Error: Read-only file system during You can not post a blank message. https://communities.vmware.com/thread/279273?tstart=0 I've been involved both with VMware and IBM support, no one could figure out why things failed.

Comment by photob0mb3r -- March 21, 2013 @ 7:09 pm | Reply whoah this blog is fantastic i love studying your articles. Vmkfstools Also, iSCSI is still not supported. Reply Gildas says: September 14, 2012 at 10:58 am great hint. Physical Compatibility mode RDMs cannot be migrated to a VMDK file.

Lun Reset Command

It really helped me understand how RDM works. http://support.qlogic.com/SupportCenter/articles/FAQ/2249?retURL=%2FSupportCenter%2Fapex%2FCustomer_Support_main&popup=true Virtual machines can then claim each of these virtual ports and use them for all RDM traffic. Waiting For Timed Out Hb In fact, I have worked in some environments where it was required to have a separate initiator group for each HBA in each host. Failed To Reserve Volume Related Comments (4) 4 Comments » hello, i had the same issue but can't do anything except a reboot.

VMware seems to say virtual RDM or vmdk only for cluster in a box, in the MSCS vsphere 4.1 white paper. This file, an RDM, is a mechanism for a virtual machine to have direct access to a LUN on the SAN. You realize, a lot of people are looking round for this info, you could help them greatly. At this point I resorted to Google as I had a pretty specific error message. State In Doubt; Requested Fast Path State Update

When using VMware vCenter Site Recovery Manager, make sure you include both the raw LUN as well as the VMFS datastore holding the mapping file to SAN replication schedules. You have to weigh the benefits (ease of use and automatically consistent LUN IDs) against the loss of flexibility. Remove and rebuild the RDM to generate a new vml ID that the LUN recognizes as a workaround. After following a few of your steps above I was able to remove the dead paths AND complete a successful SRM test & cleanup!!

You can select the partitions on screen and click "Delete" to remove any that are left until the drive just shows as "Unallocated space". Scsi Commands When I tried the /dev/disks # ls, I get a Permission denied. When you've finished you can go back to the VI client and add the disks successfully, no reboots required.

Thank you so much!

Can I use RDM-like features on other products than vSphere? steve on September 26, 2012 at 4:25 pm said: Keeping a consistent LUN ID across ESX hosts is a useful housekeeping best practice anyway, regardless of whether it's required or not. Who am I? Vmware Compatibility Guide Tom Gregory on October 16, 2012 at 6:43 pm said: We've run into issues with VML ID mismatches even though we use provisioning practices that ensure LUN ID consistency across cluster

Otherwise, all physical characteristics of the underlying hardware are exposed. It appears to the guest operating system exactly the same as a virtual disk file in a VMFS volume. Virtual machines with regular virtual disks continue to use the WWNs of the host’s physical HBAs. All my VMs on mine are gone due to this error after a power outage.

For iSCSI, you can still use the software iSCSI Initiator in your Guest OS. To actually find a reference to the requirement to keep the LUN ID consistent across hosts I had to go back to the Fibre Channel SAN Configuration Guide which we shipped Our primary cluster of 6 servers started to abend, half the ESX servers decided to vmotion of every vm and shutdown, the other 3 ESX servers were left running 6 servers That way, when removing a LUN, we could see half the paths drop before removing the remaining paths.

Thank you so much. Thanks once again, Habibalby Reply → Daniel Hernandez on September 17, 2010 at 06:04 How many RDM per virtual machine i can assign?? Can I detach a RDM and attach the LUN to a physical server? This requires either type RDM.

Reply Brascon says: November 11, 2013 at 10:00 pm Thank you very much Edward, i must admit this is well explained better than Vmware Kb. First one I've found which catagorically states partitions cannot be RDMd. Reply Jay says: June 12, 2016 at 10:06 am I spent hours on this one until i found your post - thank you very much for sharing this! Thank you!

I was getting so upset with this and finally resulted to google. PagesAbout Blogroll Pivot Point WordPress.com Categories: Hardware san eva OS edir Linux MS Netware Software Tivoli Virtualisation vmware ha pvscsi Search: Archives: October 2012 March 2012 September 2011 February 2011 January FAQ If using a RDM, what is written to physical disk regarding information about the RDM? Physical Compatibility Mode Physical mode for the RDM specifies minimal SCSI virtualization of the mapped device, allowing the greatest flexibility for SAN management software.

Bottom line - yes, RDMs still have a reliance on LUN IDs matching across all hosts, even in vSphere 5.1. do you know???