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hot-extend shared vVol disk in MSCS

July 30, 2020, 6:09 am
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Hello,

 

We are evaluating the replacement of RDMs used as shared disks of MSCS deployments by vVol.

 

We are facing a blocking operational issue with this deployment as hot-extends of the shared vVol disks does not work. When trying to extend a vVol based clustered disk, extension fails:

Operation failed!

Task name

Reconfigure virtual machine

Target

xxx

Status

The disk extend operation failed: The virtual disk requires a feature not supported by this program

 

The only way to grow the disk is to power off both nodes of the cluster! Not really compatible with the type services that need failover cluster / MSCS deployments.

 

Searching for more info, we found that hot-extends of shared disks is officially not supported. Even if not supported, it perfectly works with RDMs. Is there a way to make that work with vVol even if not supported and without power off both nodes (one node to power off could be acceptable)?

 

Thanks in advance.

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Having issues getting vVOLs to work with 3PAR

March 16, 2015, 11:11 am
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Have a 3par 7200 running fw: 3.2.1.200

 

I have connected vCenter 6 on a HP BL460 G9 running vSphere to the 3PARs VASA url.  However I cannot get the PE to be visible to the ESXi host.  I run the following command:

esxcli storage core device list -–pe-only

 

And no PEs show up.

 

In Log Insight I am seeing these warnings:

WARNING: ScsiPath: 679: Sanity check failed for pathvmhba34:C0:T1:L256. The path to a VVol PE comes from adapter vmhba34 which is not PE capable. Path dropped.

 

The G9 blade is using the 536FLB CNA.

 

Any help would be appreciated.

 

Thanks,

-MattG

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Hosts losing access to NFS share

May 22, 2012, 8:56 pm
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Hey guys,

 

I have a weird problem and it is like looking for a needle in a haystack.

 

I have two vSphere 5 hosts which are connected to IBM N-Series filer running Data Ontap 8.0.2. P3

We are using this environment to test Vmware View.

 

Sometimes a host loses connectivity to some of my 3 volumes. The volume shows up as inactive.
The other hosts appears to lose no access to the same volumes at the same time.

During all this I can still ping the filer or access a volume on the same filer from the same host.

 

The weird thing is it is not always necesarilly the same host or same volume that acts weird.
I logged a job with VMware and they basically said it is an issue with filer or networking.

I cannot find anything on the network side. The connection does not go down. Remember some of the volumes are still accessible.

 

I logged a job with IBM but they don't even bother getting back to me.
I decided to add a different filer in the mix. This time a netapp 2040.

At this stage I have two different filers connected to my two hosts.

 

The Netapp volumes show the same behaviour. It loses connectivity to some volumes but not all and not necessarilly from same host or same volume.
Now that I have two filers in the mix I lose connectivity to random volumes on both filers. And they don't necessarilly have a VM on them either.
They seem to flap a lot. Some of them come back after a few minutes. Looks like a game of ping pong.

 

During this time there are no issues with the hosts networking. There is no disconnect from vcenter and only VM that happens to sit on shared volume is affected.

 

Everything appeared to have been stable for a few days but when I deployed VMs with rapid cloning utility this morning it went all pear shape.
I have also witnessed this behaviour when deploying with Vmware View Connector or just migrating VM's to the filer's datastore.

 

This rules out the filer's in my opinion.
I also don't believe it is the switch as nothing shows up in the logs.

 

To me it seems host related and potentially vSphere 5 specific.

 

Our production environment is configured the same without any issues but that is running vSphere4.

 

 

Any ideas because I don't have a clue right now :-)

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unable to increase SAN datastore in Esxi6.7

August 10, 2020, 2:22 am
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Hello Everyone,

we have a storage only have one pool and one volume, before it's mapped to one vSphere 6.5 hosts A by SAS cable, only one VM 01 is stored on this storage.

now two we have 2 of 6.7 host in one cluster, host B and host C. the storage now is also mapped to two new host by SAS cable as SAN datastore. migrated VM 01 to host host C from vCenter.

now in storage we increased capacity of volume, from host C, we can see total capacity of this SAN is correct, but we can't increase capacity of this SAN database.if select add extent, show no device with free space, if select expand, the capacity is not change of partition.

 

IncreaseDatastore.jpg

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Mark as flash Disk?

August 21, 2020, 8:51 am
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Hello all, I have a few questions about this feature.

1. What does "Mark as Flash Disk" actually do?

2. Is there an advantage of marking an SSD LUN which is falsely recognized as HDD as Flash Disk, in a non-vSAN cluster. In this case the LUN is presented from a SAN backed by a pool of physical SSD drives.

3. In a scenario where a LUN presented comes from a tiered SAN pool, i.e.: mix of HDD and SSD drives where Software-Defined SAN moves hot\cold blocks up and down from\to HDD and SSD, would it not be recommended to mark that LUN as FLash Disk?

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Storage vMotion vs LUN resize

September 2, 2020, 3:57 am
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vSphere 6.7 (storage vMotion set to manual)

 

I inherited an environment where all the LUNs (NetApp SAN) were sized at 6TB.

 

The environment is growing, at least a few (2-5 of 100) VMs are constantly growing and I find myself resizing their (usually Windows Server 2012 R2) disks twice a year.

 

I have a few VMs that are 4TB, so I'm starting to get storage warnings on a few datastores.

 

I've done a few storage vMotions on smaller VMs and the performance seems pretty terrible: some of my applications actually react to the SAN latency.  Sigh...

 

I guess the answer is obvious?  Do I:

1. Create a few bigger LUNs (10TB) and move those bigger VMs to it?

2. Just resize my existing LUNs to 10TB, and then I don't need to move any disks?

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Can we add multiple Storage to our existing License

September 22, 2020, 7:15 pm
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Hi VMware and Team,

 

We would like to enquire if our current license can support multiple SAN Storage?

 

 

 

Thanks & BR,

Logan

6017-3000398

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Delete Datastore

October 19, 2020, 3:14 pm
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Hi gurus

 

I want to delete a datastore but I am facing the "datastore in use" error, I have checked that no one VM has an iso pointing to this datastore, all VM has been migrated to another Datastore, but there is still a folder that has  some files recently modified

 

Vphere.HA and some naa  I have a protectedfile on vsphere.HA and some spotfile on the naa. folder.

 

1) do I have to unmount the datastore first before I an even think of deleting the Datastore all together

2) How do I find out what is still using the datastore so I can get rid off it and delete this datastore .

 

 

Thanks a bunch

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