Commissioning of the size of the lun with SRM

Similar Questions

• extremely interesting and urgent - possible difference in appearance of the LUN with and without clichés unexposed to the initiator

  Hello

  I decided to build this case in my testlab, it seems very interesting to me. Someone here in the Group of any idea what could be or already heard of such a case?

  http://forums.Veeam.com/viewtopic.php?f=2&t=15746

  Background / idea: no accessor LUN should never see even the slightest difference between a lun as such and the same lun with snapshots not exposed. This must be absolutely and completely transparent to all - host, the initiator and the engine of the cbt. The only exception would be tools or plugins that take specifically the use of deeply integrated san-snapshot features.

  Best regards
  Joerg

  Question, you use VSM to take the initial snapshot?    If so, the same thing happens if you create a snapshot in Workgroup Manager instead?

• Protect the DHCP with SRM

  Hey guys,.

  We are in the middle of a project of DR and have come to the point that we want to have our service ready DHCP DR.  The idea of Split range (80/20) standard is an option we are looking at, but in a DR or even single server failure there is a bit of management that is necessary to ensure the secondary DHCP server can serve all the IP addresses of all scopes (before it's 20% fills).  So we have an idea to use SRM to protect DHCP.

  We have two sites, connected via the 3 layer, with two 10GB connections between the two (for fault tolerance and load balancing).  The DR site is a live environment; It is a branch across the city (such as 30 kilometers).

  The idea of the scope of Split we have DHCP running on a domain controller in each site with the server DHCP secondary (DR) serving 20% of the IP addresses of each field and the primary DHCP serving 80%.  This can be setup using the wizard of scope of Split that MS has the Server 2008.  In doing so we cover failure of the primary DHCP server (it is also a virtual machine so HA protects too), but also the Site as the secondary DHCP server failure will be in place.  If we have an extended outage of the primary DHCP server then we need to get to the secondary DHCP server and increase all scopes, ensuring that conflict detection is on.

  Our thinking is to move the DHCP on the domain controller and give it its own virtual server.  Then, we protect the service DHCP using MRS to move it on the DR site in a DR situation.  This will cause the DHCP server to get a new IP address, as the two sites are connected by Layer 3 - the same subnets cannot exist in both places.  And that's where our thought process is getting confused...

  What will happen with the DHCP service, if the server has a new IP address?

  What is the process for DHCP clients attempting to renew its IP address:

  one) to restart the computer?

  (b) to the mark 1/2 way of their lease?

  On the one hand, I think that MRS is the easiest way to protect not only the DHCP, but also to minimize the DHCP solution management.  The scope of Split idea help to ensure that any change to a DHCP server is replicated to the other server: scope changes, scope of options changes, reservation changes, etc...

  Has anyone analyzed the all around it?

  Thank you!!

  Gerald

  That is right.  DHCP server only cares about its own address.  As long as you subnet broadcast forwarders to two IP addresses of the DHCP server so that the request hits the server DHCP it matches just MAC address for reservations of IP / scopes etc. and will work.

  Only thing to check when it rises to the DR is if the DHCP server may need approval again before DHCP works. Do not remember how it works off the coast of the hand.

• HARD drive 2 TB - stuck to the size of the LUN 256 GB

  I'm unable to untilize the free space on a 2 TB HARD drive. I am told is 1.81 TB free space but I'm going to create a data store, I thought that the maximum size is 256 GB. Also, when I try to increase it, it tells me that the value is greater than the capacity of the disc (which contradicts the previous readings).

  Screenshots:

  http://img694.imageshack.us/img694/4851/FreeSpace.PNG

  http://img851.imageshack.us/img851/709/MaxSpace.PNG

  http://img714.imageshack.us/img714/5878/customspace.PNG

  Here is the result complete fdisk:

  ~ # fdisk-l
  
  Disk/dev/disks/t10. ATA___Hitachi_HDS723020BLA642___MN1220F3275YED: 2000,3 GB, 2000398934016 bytes
  255 heads, 63 sectors/track, 243201 cylinders
  Units = cylinders of 16065 * 512 = 8225280 bytes
  
  Device boot start end blocks Id system
  / dev/Disks/T10. ATA___Hitachi_HDS723020BLA642___MN1220F3275YEDp1 1 243201 1953511008 + fb VMFS
  
  Disk/dev/disks/t10. ATA___Hitachi_HDS723020BLA642___MN1220F3275XVD: 2000,3 GB, 2000398934016 bytes
  255 heads, 63 sectors/track, 243201 cylinders
  Units = cylinders of 16065 * 512 = 8225280 bytes
  
  Device boot start end blocks Id system
  / dev/Disks/T10. ATA___Hitachi_HDS723020BLA642___MN1220F3275XVDp1 1 243201 1953511008 + fb VMFS
  
  Disk/dev/disks/t10. ATA___Hitachi_HDS723020BLA642___MN5220F32ELD3K: 2000,3 GB, 2000398934016 bytes
  Heads of 64, 32 sectors/track, 1907729 cylinders
  Units = cylinders of 2048 * 512 = 1048576 bytes
  
  Device boot start end blocks Id system
  / dev/Disks/T10. ATA___Hitachi_HDS723020BLA642___MN5220F32ELD3Kp1 5 900 917504 5 extended
  / dev/Disks/T10. ATA___Hitachi_HDS723020BLA642___MN5220F32ELD3Kp2 901 4995 4193280 6 FAT16
  / dev/Disks/T10. ATA___Hitachi_HDS723020BLA642___MN5220F32ELD3Kp4 * 1 4 4080 4 FAT16 < 32M

  
  / dev/Disks/T10. 5 254 255984 6 FAT16 ATA___Hitachi_HDS723020BLA642___MN5220F32ELD3Kp5
  / dev/Disks/T10. 255 504 255984 6 FAT16 ATA___Hitachi_HDS723020BLA642___MN5220F32ELD3Kp6
  / dev/Disks/T10. ATA___Hitachi_HDS723020BLA642___MN5220F32ELD3Kp7 505 614 112624 VMKcore fc
  / dev/Disks/T10. 615 900 292848 6 FAT16 ATA___Hitachi_HDS723020BLA642___MN5220F32ELD3Kp8
  
  Partition table entries are not in the order of disc
  
  Disk/dev/disks/t10. ATA___Hitachi_HDS723020BLA642___MN5220F32EGVEK: 2000,3 GB, 2000398934016 bytes
  255 heads, 63 sectors/track, 243201 cylinders
  Units = cylinders of 16065 * 512 = 8225280 bytes
  
  Device boot start end blocks Id system
  / dev/Disks/T10. ATA___Hitachi_HDS723020BLA642___MN5220F32EGVEKp1 1 243201 1953511008 + fb VMFS

  The HARD disk that relates to this is the ESXI HDD: MN5220F32ELD3K, with the FAT16 partitions.

  Even when I try to use the LUN with 256 GB in size, I gives me an error: http://img543.imageshack.us/img543/6163/errorsq.PNG

  To me, it looks like the 3 partition - which should be the VMFS partition - has been deleted at some point!

  You can (at your own risk) follow http://kb.vmware.com/kb/1009829 and try to manually recreate the VMFS partition/data store on the system disk.

  André

• PowerCLI reports wrong of the LUN size when perennial reservations are met * and * size of the LUN is changed.

  My question is: is this expected behavior?

  In short, the situation is this: we have a cluster running ESXi 5.5.0 build 1746018. Two guests Windows Server R2 2012 are running a SQL Server Cluster (MSCS), making use of RDM with a physical SCSI emulation. Which requires LUNS of perennial reservations activated. All is well until the customer decides to expand two of the LUNS. PowerCLI continues to account for the original size of those LUNs, which breaks our reports.

  Logically, it makes sense, but it still seems a bit of an ejection. Has anyone seen elsewhere this behavior and you have found ways around it?

  See you soon!

  You didn't say how to retrieve the size of the LUN.

  If not through esxcli, not the following returns the correct size (change the hostname ESXi and LUN canonicalname)?

  $esxcli = get-EsxCli - VMHost MyEsx

  $esxcli.storage.core.device.list ('naa.60050768123455af1800009876000023')

• Cannot expand the data store after you have developed the LUN size

  Greetings:

  I have an interesting problem that happens with my server ESXi.  I've expaneded a 1 logical unit number. 5 t 3 t, re-read the SAN of the host itself (not) yet ESXi always reports the LUN size as 1. 5 t and not extensible.

  SAN is an EMC VNX and Unisphere, in fact, reports the size of the LUN 3 t.  The VMFS on this logical unit number is at version 5.54.

  I did updates and renumerisations a single host and nothing does change regarding the size of the LUN as reported in VMware.  I can't imagine what is a tissue issue given that the underlying data is always available and functional.

  Does anyone have any suggestions to try this?

  Ron

  You have a RecoverPoint of installation for this logic unit number? I fell right on the same problem as you described and found this article. It worked for me.

  http://www.mikes.EU/index.php/how-to/254-how-to-resize-a-LUN-that-is-already-replicated-by-EMC-RecoverPoint

  ~ Tim

• Size of the LUN. Urgent request.

  I have a node cluster 3 ESX4.1U1 with iSCSI SAN connectivity. I have multiple VMFS LUNS mapped in the cluster, and certain RDM mapped to the guests.

  A guest, a Windows 2008 R2 VM, has a large ROW mapped. This, according to the SAN is 1.89 TB in size, and I am almost out of space. If I look at storage adapters in vCenter Configuration, it also shows that 1.89 TB, but the Windows 2008 VM shows like 1936 GB. OK, so that sounds about right.

  I want to add an another 100 GB to the LUN. I added this on the SAN, so the LUN shows now 1.99 TB. A refreshment in vCenter on each cluster node also shows the LUN now as 1.99 TB, so knowing the 2 TB LUN limit, I should be ok.

  I have re-scanned disks in the Windows 2008 VM and it shows the available extra 100 GB, so I guess I can extend the volume in free space, but this will push the volume size up to 2036 GB. I read that VMware calculates LUN size in base10, so the maximum size is 2000 GB - 512bytes. I'll have a LUN liked than that, at least in the comments.

  Thing is, at this stage, that didn't stop me doing. I have no error or warning, and the fact that the cluster sees the LUN 1.99 TB seems to imply, I should be ok.

  Before I develop the volume free space, can someone confirm if I'm having problems with this? It's quite urgent, so a quick response would be appreciated. The volume of the guest is a basic (not dynamic or GPT) disk. I don't know that the MBR in Windows volume limit is 2.19 TB, so I should be ok with this.

  Look for example at the table at the bottom of the http://kb.vmware.com/kb/1012384 (load calculation required by the snapshot files)

  André

• The maximum size of the Lun

  Hi people,

  What is the maximum size of the LUN vmfs3 and vmfs5?

  Just to add

  In VMFS 3, you may have a data to 64, but this store will be on does not include more than 2 TB.

  This means that you will use 32 2 TB LUN 1 data store. It is not recommended. 1 LUN. bulk loose any data store.

  Where with VMFS 5 you can creat a TB 64 logic unit number (if storage supports) and do a data store.

  Keep the best ratio of 1:1 = 1LUN per Datastore 1 practice

  For more information, see VMFS 3 vs. VMFS 5

  Please mark this thread as answered in the affirmative indeed.

  I keep coming back to my son without response

• The LUN size limits

  I have a question about the size of the LUN. I'm about to have a provider setup a HP Storage Works modular Smart Array P2000 with 20 discs LFF 450 GB. I'm trying to understand the best way to configure the LUNS to maximize the available space. Can I go with 2 LUNS of 10 discs each who would each LUN 3771 GB each? I'll go with ESXi 5, all guests will be Win 2008 R2 64 bit and I intend to have two servers with about 1 TB of office space and about 15-20 with 150 GB of disk space.

  The maximum size of the LUN, VMFS data warehouses and raw physical devices in ESXi 5 is ~ 64TB.

  You can configure the MSA with the LUN sizes you mentioned. However, it also depends on the workload of computer virtual and if you make a backup with snapshots. I probably go with 3 or 4 LUNs and present them on different controllers.

  I'm not familiar with the MSA, however, you should be able to create a large RAID set several records and cut the LUNS in that RAID, the value instead of creating multiple RAID sets with fewer disks.

  André

• Increase in size of data store ESXi after increasing the size of the LUN

  Hi all

  Scenario is as follows.

  Remote site with Dell r710 ESXi 4.1 servers 2, 1 Dell MD3200i SAN with 12 600 GB drives.

  Initially when I implemented the San, I created 2 LUNS with 1 TB in each LUN.

  Now, we ran into a situation where we have 1 server which is now need more than 1 TB of sapce on it.

  I've reconfigured the table and now have a unit number logic that I spent in 2 TB to 1 TB and I now need to increase the store of data on the ESX Server.

  If I increase the size he reformatted the LUN whole or just the free space that I create?

  I don't want to remove any exisitng s VM on the SAN.

  maximum size of a vmfs is 2 TB-512 b only. extend wouldn't format the LUNS. Look at this blog: http://www.yellow-bricks.com/2009/03/26/resizing-your-vmfs-the-right-way-exploring-the-next-version-of-esxvcenter/

• Size of the LUN Max size minimum and maximum RDM?

  The Maximums on 4.1 Configuration seems to have been a change in the size of the LUN max, of the strange 2 TB - 512 bytes to just 2 TB. Can anyone confirm that it is correct in 4.1? As I understand it in 4.0, if you got your logic unit number created to exactly 2 TB, you have lost about 500 GB of space (?).

  It would be interesting to know if it is "fixed" in 4.1 and if only the use of 4.1 hosts then 2 TB LUNS could be created?

  In addition, the maximum size of RDM always seems to be 2 TB - 512 bytes in 4.1. What is the reason for this kind of limit? If the guest operating system can accept more large drives of 2 TB, which need not enough?

  ricnob wrote:

  Even on the store of NFS, the maximum size of virtual disk to a virtual machine will be 2 TB - 512 bytes?

  Yes, there is a maximum specified for the virtual machine.

  Would a connection iSCSI comments launched a LUN liked work of 2 TB (if the guest operating system can handle)?

  Yes, it's a way to work around the limitation of current 2 TB - 512 bytes.

  The information about this change in the passage of Q & A at the end of TA7121 - ' next generation VM Storage Solutions with API for integration (VAAI) Array vStorage "was held in San Francisco just a couple of weeks.

  Interesting. Did you get any sense if this possible change should come an update for 4.0 - 4.1 or may appear in a future version, 4.5 or 5.0?

  I will attend at Vmworld in Copenhagen in October, so maybe I should visit this session.

  You know, I don't really have a strong impression be it on this issue.  My stomach seems to tell me that it will be in the next version of main product.  If I remember correctly, one of the presenters of the session was one of the engineers who worked initially make VMFS.  This session was really good, so I recommend anyway.

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  Inside this loop, I'm auto-indexation four different 1 d arrays. This means that the size of the tables will be different in the different phases of the execution of the program (the size will equal the number of measures).

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