vin01
Expert
Expert

Need to temporarly disable storage rescan to avoid APD\PDL condition


Hi Floks

Is there any possibilty to disable the continous storage discovery by esxi host for temporary purpose.

Briefly:

Our storage team is planning to perform maintenance activity on one of the stoarge box which is connected to more that 90% of hosts in different clusters in vmware environment and this storage is connected to vms also.

We are planning to powered off all vms connected to that storage to stop i/os but still esxi will discover the storage and shows APD or PDL condition so for esxi 4.1 host will go to not responding state this will effect leftover vms and for 5.0/5.1 hosts there might be chances to show not responding state so to overcome this is there any possiblity to stop discovering the particular storage for temporary purpose to carry activity.

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Regards Vineeth.K
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vmroyale
Immortal
Immortal

Note: Discussion successfully moved from Forum to VMware vSphere™ Storage

Brian Atkinson | vExpert | VMTN Moderator | Author of "VCP5-DCV VMware Certified Professional-Data Center Virtualization on vSphere 5.5 Study Guide: VCP-550" | @vmroyale | http://vmroyale.com
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vThinkBeyondVM
VMware Employee
VMware Employee

Hi Friend,

   You can keep attached datastores into maintenance mode which is carved from the storage array  that you want have maintenance. If SDRS is enabled, once you keep datastore into MM, it will automatically SVMotion all VM files to other available datastore from other storage array.

On disabling rescan I am not sure but will let you know if I could explore.


----------------------------------------------------------------
Thanks & Regards
Vikas, VCP70, MCTS on AD, SCJP6.0, VCF, vSphere with Tanzu specialist.
https://vThinkBeyondVM.com/about
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Disclaimer: Any views or opinions expressed here are strictly my own. I am solely responsible for all content published here. Content published here is not read, reviewed or approved in advance by VMware and does not necessarily represent or reflect the views or opinions of VMware.

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vin01
Expert
Expert

thanks vicky for your advice..Can you pls explain how to keep data stores in maintenance mode..any kb is available..actually we don't use storage Drs in our environment..

Regards Vineeth.K
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wmarusiak
Enthusiast
Enthusiast

He meant to create datastore cluste, Afterwards you can set certain datastores from cluster into maintenance mode. Enable and Disable Storage DRS

Best Regards, Wojciech https://wojcieh.net
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vThinkBeyondVM
VMware Employee
VMware Employee

Hi Friend,

   Storage DRS is introduced in vSphere 5.0. You need to have enterprise plus license to get SDRS to work.

If you can satisfy above requirement, creating datastore cluster is very easy.

Even if you have only 1 host & 1 VC with 5.0 version, you can achieve this.  You will have to migrate VMs one by one to 5.0 host from older version & attach all datastore to 5.0 host as that of older host. You can add all datastore into datastore cluster.

Plz refer below link for creating it from vsphere client.

VMware vSphere 5.1

From web client : (This link gives you more insight on it)

How to create a datastore cluster using the new web client. - frankdenneman.nl

To keep datastore in maintenance mode

VMware vSphere 5.1

Note:

-Collection of host is compute cluster. If you enable DRS on cluster, it helps to balance cpu & memory load on cluster & also initial placement.

-Collection of datastore is datastore cluster. : If you enable SDRS on cluster, it helps you to balance space & io load balance & initial placement.

-Both type of clusters allow to keep host or datastore into MM .

Let me know if you need any other info/help


----------------------------------------------------------------
Thanks & Regards
Vikas, VCP70, MCTS on AD, SCJP6.0, VCF, vSphere with Tanzu specialist.
https://vThinkBeyondVM.com/about
-----------------------------------------------------------------
Disclaimer: Any views or opinions expressed here are strictly my own. I am solely responsible for all content published here. Content published here is not read, reviewed or approved in advance by VMware and does not necessarily represent or reflect the views or opinions of VMware.

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depping
Leadership
Leadership

some of it you can disable, rescan as the result of storage changes that is:

Automatic rescan of your HBAs.... - Yellow Bricks

Not sure you can disable the discovery rescans to be honest, let me dig for you,

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