RS 5 - NFS/VMFS and RDM

Similar Questions

• Is it possible to use Storage Vmotion with VMFS and RDM virtual tool?

  Hello!

  You can use the tool Storage Vmotion to move a server that is running both VMFS disks and RDM virtual drives inside?

  Both SAN is EMC and Vmware ESX and Virtual Center can be reached.

  Thank you!

  For storage on the SAN again the two hosts will need access to the storage. You can then you copuld cold migrate the virtual computer. First, you will need to stop the virtual machine and delete the mapping of RDM. Once the virtual machine is the new data store re-create the mapping of RDM (Bothe hosts will need to access the LUN backend).

• VMFS and RDM issue

  The limit of 256 LUNS is that RDM + VMFS or can you have 256 of each?

  Yes, that's the limit for each host. It doesn't matter if it is used as a data store (formatted with the VMFS) or a unit logic RAW number (formatted with the file system for the operating system on the guest).

  André

• VMFS-4 on ESXi 5 and RDM

  Hi, I have two hosts ESXi 4.1 and I introduced just an ESXi 5 host to the mix (iSCSI SAN).  All guests can see all LUNS.  I wanted to test the presentation of a new physics-4 to RDM LUN an exisiting VM, but when I try to do, I get the message 'mappings LUN with a capacity greater than 2 TB can be stored on VMFS5 data storage only.
  
  

  1. Should I first put the hosts ESXi 4.1?
  2. The upgrade will convert iSCSI VMFS-4 VMFS-5 data warehouses?
  3. Will it hurt anything to have the VMFS-4 data warehouses presented an ESXi 5 host
  4. Just to clarify, physical RDM disks over 2 TB are now supported in ESXi 5 - correct?

  Thank you for your help.  I'm about to buy VMware Essentianl is told by the way.

  Should I first put the hosts ESXi 4.1?

  -No - you can do it with the existing configuration, but the virtual machine would be limited to just the 5 ESXi host.  You will need to create a new data store, present it to the host ESXi 5 and create a vmfs5 data store.

  The upgrade will convert iSCSI VMFS-4 VMFS-5 data warehouses?

  -No - upgrade is a manual step that you perform on the data store.

  Will it hurt anything to have the VMFS-4 data warehouses presented an ESXi 5 host

  -There is no problem doing this.   If the virtual machine is version 7, you can run the virtual machine on ESXi 4 or 5 of material.  Once that you upgrade the version of the hardware for the virtual machine can only be executed on the host ESXi 5.

  Just to clarify, physical RDM disks over 2 TB are now supported in ESXi 5 - correct?

  -Yes - RDM physical and data warehouses can exceed 2 TB.   Virtual disks and RDM virtual are still limited to 2 TB.

• Storage vmotion a VM with so many vmdk and RDM for NFS

  I try a virtual machine that has so much Storage VMotion vmdk and RDM disks to a NFS data store.

  I do NOT need convert the RDM disks just move the pointer with the VMDK file will be converted.

  Is this possible?

  Now if I try this hot svmotion, I get an error on the RDM which set out the following "virtual disk" drive hard 3' is a direct access mapped LUN that is not supported on the data store 'myEMCNFSds'.»»

  If I try this svmotion cold then I get no warning, but it seems that svmotion is trying to convert the RDM NFS drive.

  Is your RDM in physical compatibility mode?   Check out this article KB http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1001856

  If you have found this device or any other useful post please consider the use of buttons useful/correct to award points

• People are leaning more towards VMFS or RDM these days? What YOU're running and why?

  Hello world

  I know there is a wealth of information on the subject and the standard response is to use both... whether you want array or snapshot level vm, etc..

  However, my environment is staged, I did some torture tests, tests of backup and restore. I'm almost ready to go wild p2v, but I'm still on the fence about the places where use RDM vs. VMFS. I'm running a cx500 and I was bitten by a flare code bug earlier that caused corruption unnoticed in my clone BCV we were using for backups - what was going on FOR the MONTH up to what we found out after we met weird with a cloned Oracle instance anomalies. From there I never did trust snaps or clones on the side of the table. On the other hand, I like the features of sleep to a vmdk.

  Looks like there are great benefits to go especially with VDR VMFS and similar tools push up. BUT... There is always this weird feeling relying on these vmdk files. Just curious to know what percentage of vs. VMFS, RDM people are running and why you personally and absolutely chosen RDM vs. vmfs.

  Thanks in advance.

  As we are ISCSI worldwide 3.5 we directly glued to the MSISCSI on virtual methods, it was for reasons of performance 3.5 with no MPIO

  4.0 worldwide we are leaning toward VMFS functionality set and the behavior of an interruption of SAN are advantageous for us and now with MPIO, we see large absolute performance of VMFS

  Jered Rassier

  * Professional technical EqualLogic certified

  * Dell Enterprise foundations certified professional v.2

  ##If you found my post answered your question or helpful please mark it as such.

• Please specify disadvantage of RDM, and how to modify vmfs to RDM lun?

  I read through many threads and still do not understand the disadvantage of RDM.

  #1 so, technically, the virtual machine is that a pointer to the SAN with RDM lun, correct? I could introduce this RDM drive easily to any server and see the data, and there may be a slight performance with RDM advantage.

  If this is the case, what is the advantage of VMFS to RDM with a SAN?

  #2 can a san LUN be divided into RDM disks will different VM?

  #3 if I have a unused 600GO VMFS san lun and want to make that a lun RDM, how should I do this? I need to fdisk and unformat the thing first? Then remove from storage and add?

  With the help of ESX 3.5 Update 2 and vCenter 2.5 Update 2.

  Thank you.

  #1 so, technically, the virtual machine is that a pointer to the SAN with RDM lun, correct? I could introduce this RDM drive easily to any server and see the data, and there may be a slight performance with RDM advantage.

  Fix.

  If this is the case, what is the advantage of VMFS to RDM with a SAN?

  VMFS advantages are that you can put a lot of virtual disks on a single volume.  Its a one-to-many relationship when the RDM is a one-to-one relationship to a logic unit number by computer virtual.  There is currently a maximum of 256 LUNS per ESX host, so if you had a large number of virtual machines you could get into trouble in this way.  3 RDM by 100 hosts would be a problem.  Another consideration is that the RDM add more it, the more you complicate the management of your storage environment.  Its much easier to manage a LUN 3 or 4 to 30-40 of them.  Usually the RDM are perfect when you need of MSCS, want to take advantage of the options of SAN backup, or if you have LUNS that must be transferred to a physical server at a given time.

  #2 can a san LUN be divided into RDM disks will different VM?

  I think that you do not want to break the LUNS as well.  Its much easier to manage these relationships 1-1.

  #3 if I have a unused 600GO VMFS san lun and want to make that a lun RDM, how should I do this? I need to fdisk and unformat the thing first? Then remove from storage and add?

  Not exactly, but I think you could remove the ESX host data store and then add it as an RDM to a virtual machine.  Fdisk should be able to fix it!  But back to the point 2 - it might make more logical management of skin only 600 GB and distribute according to needs.

  Good luck!

• Difference between a VMDK and RDM virtual drive

  I am trying to understand the difference between above two disks. Documents from what I have found is VMware

  1. The mapping. A VMDK disk is a file within an a (hard) RDM and VMFS file system virtual isn't a mapping to a RAW LUN file (file system).

  1. Usability: Cluster VMDK disks is supported only in a box, but the virtual disks of RDM supports Cluster-in-a-Box and Cluster-through-Box.

  If the above is the only difference between them, which is the specific scenario when to go for each of them. If there is just no other difference please let me know.

  Thanks in advance

  -Sylvie

  To see difference in performance:

  http://www.VMware.com/files/PDF/performance_char_vmfs_rdm.PDF

  http://malaysiavm.com/blog/VMware-VMFS-vs-RDM-raw-device-mapping/

  André

• Virtual machines with VMFS and LUN VMFS-no?

  Is it possible to attend the ESX3.5 VMFS and Non-VMFS LUNs virtual machines simultaneously?  We are totally an environment totally VMFS/Fiber Channel VI with Windows o/s.   Although we have all our virtual machines that reside on a VMFS LUNS storage has asked if it is possible to have Non-VMFS LUNS presentable at our VM and VMFS?

  I think I remembered that Non-VMFS storage can be made available as storage but do not know if the two can be presented at the same time

  It can be done with a RDM and no special software required.

  -Matt

  VCP, vExpert, Unix Geek

• can any contact pone want me is vmfs and difference between vmfs 5.0 and vmfs3

  can any contact pone want me is vmfs and difference between vmfs 5.0 and vmfs3

  A nice Article may help: comparison between VMFS3 & VMFS5 | Vmwareminds

• VMFS and VMDK compatibility

  Hello

  I have a number of ESX 3.0.2 - Update1 host I do fresh installs of ESXi 4.1 on. The 3.0.2 hosts are connected to the external storage where is stored the VM and data warehouses. ESXi 4.1 is compatible with the version in the format/VMFS and VMDK/version of the format of the existing data? Guests of ESXi 4.1 will be able to set up warehouses of data and power ok the virtual machine?

  George.

  There are two things to look at. The first is the version of the VMFS file system, which is - as you say - 3.21 VMFS, so it's ok. The second is version of virtual equipment of the virtual machine, which must be at least 4. (see http://kb.vmware.com/kb/1003746) With ESX 3.02, this should be the case.

  André

• How to-disk snapshot RDM in physical mode and RDM issues.

  Hi all

  I want to upgrade a few VMS version 4 to 7 production equipment, so I can save them using vDR.

  One recommendation is to take snapshots of the necessary virtual machines before the hardware upgrade, I'm unable to do so because of the disc RDM in physical mode.

  I'm looking for the answers to the following questions:

  -How do we or can we change disc RDM in physical to virtual (all risks, process involved, etc...)?

  -How a US dismantle and mount RDM disk without losing any data?

  -Can we dismantle and mount RDM disk to a different virtual computer?

  -We convert RDM to a normal virtual disk on vmfs data storage?

  Enjoy your time reading/response.

  Ta

  Hi dia,.

  Please find the answers online.

  -How do we or can we change disc RDM in physical to virtual (all risks, process involved, etc...)?

  Remove the drive from RDM virtual machine and add the ROW again using virtual mode.

  (Do not select the option Remove evil in the virtual machine and delete the files from disk)

  -How a US dismantle and mount RDM disk without losing any data?

  Same as above. (if I understand your question)

  -Can we dismantle and mount RDM disk to a different virtual computer?

  Remove from VM-1 and add the VM-2 by using the VM settings.

  -We convert RDM to a normal virtual disk on vmfs data storage?

  Yes, we convert RDM on the virtual disk using the Migration (SVMotion). To do this the virtual machine must be powered off the coast of the State.

  Let me know what answers your questions.

  Concerning

  Satya

• SQL, vmotion and RDM

  Hello

  I am a beginner and I would try to create a virtual machine with a database of sql 2005 with rdm lun.

  I created my vm on a lun that is shared between two hosts esx (for the vmotion).

  Now, I would like to add 2 rdm lun. The first on lun raid 5 for the data base, the second on a lun raid 1 for newspapers.

  But when I add the row on my vm as the vmotion and I try to migrate the virtual machine to the compatibility of field, it is 'impossible to migrate from esx1 to esx2. Virtual disk is mapped lun direct access which is not accessible.

  you have any suggestions?

  Sorry for my English

  Hello

  LUNS that are configured for the RDM plan must be visible on all ESX servers participating in the activity of vmotion. They must also have the same ranking of LU.

  for example

  ESX 1:

  READ 0 = store VMFS

  READ 1 = RDM

  ESX 2:

  READ 0 = store VMFS

  READ 1 = RDM

  http://blog.laspina.ca/

• List of virtual machines with drive and RDM details

  Hi all

  I have a script, which could give me the list of parameters

  Name

  PowerState

  IP address

  Cluster

  ESX host

  Folder

  Data store

  I would like to have disc info and info RDM with its size.

  Please help in editing the script below

  Get - VM | Select Name, PowerState,

  @{N = 'IP address'; E = {@($_.guest.) (IPAddress[0])}}, '

  @{N = 'Cluster'; {E = {Get-Cluster - VM $_}}, '

  @{N = "ESX host"; {E = {Get-VMHost - VM $_}}, '

  @{N = 'File'; E={$_. Folder.Name}} '

  @{N = "Datastore"; {E = {Get-Datastore - VM $_}} | `

  Hello

  here a modified script:

  Get-VM | Select Name, PowerState,
  
  @{N="IP Address";E={@($_.guest.IPAddress[0])}},
  @{N="Cluster";E={Get-Cluster -VM $_}},
  @{N="ESX Host";E={Get-VMHost -VM $_}},
  @{N="Folder";E={$_.Folder.Name}},
  @{N="Datastore";E={Get-Datastore -VM $_}},
  @{N="RDM type";E={(Get-HardDisk -VM $_ -DiskType RawPhysical,RawVirtual).DiskType}},
  @{N="RDM disk name";E={(Get-HardDisk -VM $_ -DiskType RawPhysical,RawVirtual).Filename}}
  

  Lines 8 and 9 are added to your script. You can add other lines in a similar way.

• vSphere replication and RDM

  Hello

  I have a site that I put in place which has Windows 2012 R2 invited with RDM in physical compatibility mode.  When I go through the wizard of replication vSphere for these servers I can configure replication for the comments and as expected I can not set up for the RDM (which is fine, I have those covered by the SRA) but on the last stage it errors with the following:

  Configure a virtual machine for replication

  VRM Server runtime error. Please check the

  documentation for troubleshooting information. The

  detailed exception: "HMS can't put disc UUID for"

  VM disks: ManagedObjectReference: type =

  VirtualMachine, vm-34 = value, serverGuid is C5ABE757 -.

  9697-4C6A-A36B-F98F72EFB5GG'.

  Contoso\tdaley

  VC1.contoso.com

  02/09/2014 14:49:40

  02/09/2014 14:49:40

  02/09/2014 14:49:41

  Is it not possible to ignore the RDM or is not my problem?

  Thank you

  Thom

  Physical RDM mode is not supported by vSphere replication and there is a known issue, you cannot configure replication for VM with RDM physical mode even if you exclude this record of replication.

  Check the release notes: VMware vSphere replication 5.5.1 Release Notes

  Cannot configure a virtual machine with disc RDM in physical mode even if the disk is excluded from replication.

  If you configure a replication of a virtual machine with the physical mode, the following error message may appear:

  VRM Server generic error. Check the documentation for any troubleshooting information. The detailed exception is: HMS can not set disk UUID for disks of VM : MoRef: type = VirtualMachine, value = , serverGuid = null'.
  

  Workaround: No.