HA with RDM

Similar Questions

• VMotion VM with RDM failure

  I am facing a problem that I can not vmotion/migrate a VM with RDM. Other virtual machines with the RDM can vmotion, but I have a problem with a virtual machine. The error is:

  Incompatible device

  specified for the device backup

  "33."

  Copy the configuration of the Virtual Machine

  Check the compatibility mode and check the bottom of the article for more information.

  VMware KB: Difference between RDMs physical compatibility and virtual RDM compatibility

• MSSQL server VM cluster should be in the same host or different hosts with RDM

  Could someone me on how to place the code SQL cluster s VM with RDMs in ESXi hosts for advice.

  What is the best practice to place the SQL VM s in ESXi hosts.

  Affinity or an anti-affinite...?

  Appreciated your valuable answers.

  Depends entirely on the use case.

  • 2 MS SQL nodes on the same host to see the availability of the software
  • 2 nodes on different hosts to see the availability of the equipment

  I'd say MS Clusters on the same host (at the time of HA and vSMP FT) are redundant VMware features and represent an increase in management fees. The MS cluster on hosts provide something in addition to what VMware vSphere alone can provide!

• Poor with RDM only when added to the CAB MSCS cluster performance

  Hey guys, thanks for taking a peek at this question... I'm looking for some ideas.

  I have 2 virtual machines running Windows 2008R2.  They put MSCS in place and works as a taxi (cluster across boxes).  I use a 7500 VNX, fiber channel and RDM physical drives.  Is on an 8 node ESXI 5.1 v1117900 implemented.  Functionally, everything works fine.

  The problem is that the performance is very poor on only the RDM that have been added to the MSCS cluster.  I can take the same drive, remove the cluster, run IOmeter and it's fast.  I add to the cluster, MSCS, leaving in storage, and it is 1/15th the IOPS performance / s.  Remove the drive of MSCS and it goes back to when you run as usual.

  I tried different controllers SCSI (LSI Logic SAS vs Paravirtual) and it doesn't seem to make a difference.  I have physical MSCS clusters that do not seem to present this kind of performance problem, so I wonder if it was not something goofy with the MSCS on the configuration of virtual machines.

  I've already implemented in this article: http://kb.vmware.com/selfservice/microsites/search.do?language=en_US & cmd = displayKC & externalId = 1016106

  I saw this poor bus rescan the performance issue until I put the RDM perpetually booked, but it was not a problem since I implemented the fix.

  For any help or suggestion is appreciated...

  Thank you

  -dave

  Recently, I upgraded my esxi from 5.0 to 5.1 environment and have a bunch of systems with RDM. I had a problem as well. What I found, was that during the upgrade it changed all the policies of path to the LUN and rdm, it's the turn of robin. This causes a huge performance issue in my environment. I changed all the paths to MRU and it solved the problem.

• RS 5 with netapp SRA, FCOE site iSCSI with RDM

  Hi team, could someone please help to veify if it works in this scenario.

  We have PROD site running vmware vcenter 5.0, esxi5.0, SRM 5.0, Netapp 3210 ONTAP8.1 version file server. The VMs are windows Server2008, MS SQL2008 as major DB. Virtual RDM database files. Only FCOE for this site. AD is a physical Server 2003. The rest are virtual machines

  We offer you to have SRM for DR site deployment. The DR site is synchronized with netapp SRA snapmirrror, controlled by the console SRM5.0. Recovery site has no FCOE, only iSCSI and NFS license availble. Always RDM but using iScsi. vCenter 5.0, 5.0, netapp ONTAP8.1 2040 esxi.

  My questions are:

  1. If VMware SRM support DR failover for this case with the different protocol, PROD is FCoE, iscsi DR

  2. If the SRM supports failover with RDM in our case

  3. If the AD DR Server site need to be installed as a new best practices, or we will have to use SRM to switch production announced on website of Dr. What is recommended.

  4. If the physical AD can be kept as the common way and always taken SRM supported

  5. to the recovery site, which is the best practice? To use NFS to store data and iSCSI for iscsi? Or store data and RDM using iSCSI LUNS to simplify?

  
  

  Thank you!
  

  1. Yes
  2. Yes
  3. I would recommend if possible having a domain controller AD, already running on the DR site - it may be a virtual machine
  4. Yes, the PROD site domain controller can be physical
  5. I'd keep all compatible iSCSI so so -.

• SRM with RDM, PRO using DR using iSCSI and FCoE

  Hello team, I plan a MRS. for a client, hoping to get your advice. the site of production using vcenter5.0, netapp3210, SRM5, esx5.0. FCoE for RDM for MS SQL server access. but DR site has only iscsi license, no FCOE, no card of the CNA. Will be RS stil works with RDM disks for data from MS SQL MON? advice please, thank you!

  Welcome to the community - there must be no descendants with presentation of RDMs fomr an iSCSI SAN-

• SRM 5.1 & NetApp - VM with RDM and MSCS

  Hello

  I implement SRM 5.1 with NetApp (with SnapMirror) and I have several questions:

  -Replication of the volumes through the table Manager, runs successfully

  -How the replication of virtual machines with RDM? can also be done through the Bay (with SnapMirror) Manager or better do with vSphere replication. Can be achieved by vSphere replication?

  -Make all the tips for the replication of virtual machines in a cluster of Microsoft?

  Thanks for all!

  I'm not a person of NetApp, but this should be documented in the documentation of the SRA.

  Another point is that MSCS RDM cannot be configured with political tourniquet (which is usually is the default value for NetApp LUN). You must reconfigure the LUNS to MRU.

  Edit: Just have done a quick search on Google and found this pdf that looks like what you need:

  http://www.NetApp.com/us/media/tr-4064.PDF

  Michael.

• Start a VM with RDM

  Is it possible to start the VM with RDM or not?

  Hi Eric,.

  I guess you want to know if a virtual machine can be started since a p/vRDM.

  It is possible

  Kind regards

  Ralf

• Storage vMotion - WITH RDM? - Or will they ignored most of the time?

  Hi all - I have a storage vMotion, 5 hosts in the cluster - five or 6 virtual machines with RDM are pinned to specific hosts for the love of the DRS, but I want to go where the readers of the OS, then to VMDK is one San to another. If the virtual machine has a C:\ drive on the data store, all the other disks on the virtual computer is through physical RDM. ALL I need to move is the c:\(VMDK) in the process of storage vmotion.

  Time without are connected and work today to the ESX host in the cluster, all hosts are sized to see the RDM.

  My question is, when we go to perform the storage vMotion, how to avoid such failure? the RDM are my concern in the past, I think I remember a machine do not migrate when he had attached RDMs.

  any comments or thoughts would be really useful.

  Nick

  You can also move the ROW pointers with the data store 'change' - Assistant. Just be sure to select "same as source" for the format of the target disk. If you choose thick or thin, the RDM will be transformed into a VMDK, but with "same format" simply the ROW pointer is moved to the new data store.

  -Andreas

• VMotion with RDM MSCS VM´s

  Hi all

  Just to check:

  -Microsoft cluster with RDM on vsphere 4.0 - I do vmotion?

  -First disk can be created in stock?

  I read vsp_40_mscs.pdf, but it is a double check. (in this guide figure how much limitation vmotion)

  I also read http://KB.VMware.com/selfservice/microsites/search.do?language=en_US & cmd = displayKC & externalId = 1005241

  Thank you all

  Post edited by: MauroBonder

  First installed the virtual machine Guest OS drive. First disk of old versions be distributed in local disk.

  MSCS documentation:

  You can put the boot disk to a virtual machine on a VMFS volume based on the SAN.

  Can I do vmotion with this scenario?

  No, you cannot vMotion with shared disks MSCS nodes.

  André

• Machines MSCS with RDM, how to change the data store?

  
  Hello world

  I'm having a problem of displacement of 2 machines with RDM disks.
  We have 2 guests ESxi 4.1 with virtualcenter, but no license for vmotion.

  This 2 machines is building a MSCS Cluster (Microsoft) (file server) with multiple disks (5) RDM,
  for a total area of 8.9 TB. Of course, for use with MS cluster, the WDR is with physical compatibility.

  The problem is that the local vmdk (and also rdm.vmdk files) for these 2 machines are on the local data store (a machine for each host) and I need to move them to the shared storage. But if I power off of a computer and trying to change with the ROW data store attached, I get an error because the VMFS of the commune dastore (block size = 1 MB) does not support these large files (up to 2 TB).

  I read a lot of articles
  http://KB.VMware.com/selfservice/microsites/search.do?language=en_US & cmd = displayKC & externalId = 1031041
  http://KB.VMware.com/selfservice/microsites/search.do?language=en_US & cmd = displayKC & externalId = 1026256
  http://KB.VMware.com/selfservice/microsites/search.do?language=en_US & cmd = displayKC & externalId = 1002511
  and a few other discussions of communities.

  In accordance with article
  http://KB.VMware.com/selfservice/microsites/search.do?language=en_US & cmd = displayKC & externalId = 1005241

  I tried to turn off the machine, remove the RDM, migrate to another data store, and then reconnect the RDM.
  There is a big problem with the last point, because I don't know how readd the RDM manually (vmfsktools?).
  I want to add an existing drive, but he was in local storage, and I don't want more no reference to the file in the local storage...
  According to the documentation of vmware for MSCS, the second node of the cluster disks can be added simply to add a drive existing and selecting the
  existing node. If it is no problem of shared storage, but the host cannot read local storage to another host...

  Any suggestion to migrate a computer virtual with RDM shared storage room? Thank you

  E' possibile disabilitare he LUN filtering per vedere UN RDM gia awarded:

  http://www.yellow-bricks.com/2010/08/11/storage-filters/

  Option da diabilitare temporaneamente in vCenter config.vpxd.filter.rdmFilter

  Andrea

• Need advice. Move VM with RDM connections.

  I'm moving A VM with RDM of ESXi 3.5 5 relationships (free Version) using Veeam FASTSCP for vSphere 4.1. I copied the VMX and VMDK files for the C drive only to the new data store in vSphere.  I then tried to add RDM connections for the virtual machine in vSphere.  I get an error on the MAX # of virtual disks supported have been exceeded.

  Notes:

  1. After copying the file on the new cluster, RDM readers VMX appears as a normal virtual disk. x 5 (even though I never copied them on)
     
  2. Normally, I add the connections of RDM and remove these virtual disks 'Phantom' original and everything is fine.
     
  3. Storms, this addition is a total of 10 virtual disks, which puts me over the limit.
     
  4. Y at - it an easier way to move this virtual machine to the new cluster.
     
  5. Any help is appreciated.
     
  6. SAN (axiom of the 500-32 to Terminal)
     
  7. Cluster = 3-Dell Poweredge R710 Intel Xeon x 5690 @ 3.47 Ghz 96 GB of memory for each...
     

  Check this http://kb.vmware.com/kb/1005241 Ko

  might be useful

• Migration of storage with RDM

  I images migration towards a new framework for storage. Things work really well, but I hit came across a few images which have been implemented several there are many moons with RDM. The kicker is that they are in physical compatibility mode, so I can't just migrate and convert them to a vmdk. Any thoughts on an approach to migrate? Only the approach that comes to mind is to use VMconverter. This would require a little time to stop, so I'll have to postpone this possibility. I have a lot more flexibility on when I can migrate images if I could use the motion of storage because it requires downtime for images. At least there are only a small number who fall into this category but are images that are among the largest disc attached to like 500G - 1 TB...

  Buck

  Buck - I realize this post is old, but I came across it and thought I would fill you in on how to migrate LUNS RDM in physical compatibility mode.  I read so many messages saying it's impossible, but it's actually much easier than you think, but the virtual machine must be turned off.  Here's how:

  (1) log into the ESX console as root

  2) go to your virtual machine folder: / vmfs/volumes/vmfs-volume-freindlyname/vm-folder.

  (3) locate the pointer to your disk file, this isn't the file - vocation, it's the servername_1.vmdk, it's only a few KBs, inside he does nothing but point to the real disk file, which in this case will be servername_1 - rdmp.vmdk.  It is the file servername_1 - rdmp.vmdk maps of the e/s to the real lun which is still represented by ESX as something like vml.xxxxxxxxxxxxxxx and can be found in/vmfs/devices/drives.

  The source that you want to migrate (with this method, it is in fact a copy which is good, because the source is always left intact) can be a virtual disk, virtual rdm or physical rrdm, it is not «question, you will always use servername_x.vmdk as source file in the command string, you're about to see...»

  but before I continune, if you want to migrate LUNs compatibility mode physical to a new lun to physical compatibility mode, be sure to have configured the lun so that ESX can see.  If you convert virtual RDM of RDM physical mode, the same applies.  If you convert it to a virtual drive, just be sure to have a volume of vmfs with enough space to accommodate the new drive.

  (4) it is here:

  To migrate and convert physical RDM in virtual disk:

  vmkfstools-i servername_1.vmdk/vmfs/volumes/vm record/name of the server - newdisk_1.vmdk

  To migrate and convert physica RDM virtual RDM, there are two methods

  -in vi edit customer of VM VM settings, remove the drive mapped to vocation, off voltage then re - add a new hard drive by selecting the same disk make sure you only select virtual fashion, connect you and see all your data and mount points are the same.

  -from the ESX prompt in the folder of the virtual machine on the VMFS volume:

  vmkfstools-i servername_1.vmdk d rdm:/vmfs/devices/disks/vml.xxxxxxxxxxxxxxxxxxxxxxxx/vmfs/volumes/vm record/servername_1 - rdm.vmdk

  To migrate a new physical RDM physica RDM:

  vmkfstools-i servername_1.vmdk d rdmp:/vmfs/devices/disks/vml.xxxxxxxxxxxxxxxxxxxx/vmfs/volumes/vm record/servername_1 - rdmp.vmdk

  EXPLAINED command strings:

  vmkfstools-i is import-command clone

  the servername_x.vmdk is the source, the x will be held for the command of the unit, in my example I use this 1 which means that it is the second disc on the virtual computer.  the first disc file is servername.vmdk, it is generally always the system disk.

  the-d is the disc type for the destination you are converting to

  the rdm (p) is part of the type of drive saying the destination disk is gross, virtual or physical disk mode (the p stands for physics course)

  folder/servername_1 - rdm.vmdk/vmfs/volumes/vm tells us where to store the raw disk mapping file, I chose to put it in the folder of the virtual machine as you can see, you can put it on any vmfs filesystem, I like to keep things neat and clean.

  Hope you find this useful, don't let anyone tell you that you cannot migrate a physical RDM.  His false information.  This is how its done.

• Configuration of MPIO with RDM?

  Hello!  I just finshed alternating activation MPIO on all our volumes / ESX servers (HUGE reduction in latency of disk!) but I can't find a way to do it with RDM who are using virtual machines.  As they do not appear in the storage view, I don't know how to do this?  I can see the connections on the vmhba interface, and I see that they are 'Active' but not 'Active i/o.

  Can someone point me in the right direction?   Thank you!

  You can use either do it from the display of the adapter (as opposed to the storage view, right click on the logic unit number) or use in the command line esxcfg-mpath.

  -Matt

  VCP, vExpert, Unix Geek

• Upgrade ESX with RDM

  I'm under ESX 3.02, 61618 version and would like to carry up-to-date ESX 3.5.  But I have the RDM attached to it on a few virtual machines running on ESX 3.02 at this time.  Is there something that I need to know before upgrading to ESX 3.5 hosts? RDM is phyiscal... Thank you

  There should be no problem to upgrade with RDM - check out http://www.vmware.com/pdf/vi3_35/esx_3/r35u2/vi3_35_25_u2_upgrade_guide.pdf for more information-

  If you find this or any other answer useful please consider awarding points marking the answer correct or useful