Change ISCSI block size

[massimofabbri]

Hi,

totally new to vmware, so please forgive me.

Scenario:

Vsphere 4

2 hosts

production VMs are on an IBM ISCSI storage (3 partitions: IBMSTORAGE01, IBMSTORAGE02, IBMSTORAGE03)

backup on Buffalo ISCSI storage (3 partitons: Tera-nas-01, Tera-nas-02, Tera-nas-03) using Veeam.

some VMs from IBMSTORAGE01 are currently backupped in Tera-nas-01. No problem.

I  added in IBMSTORAGE03 a new VM that is 500GB in size. I want to backup it in  tera-nas03. The  new VM cannot be backupped because block size of tera-nas-03 is 1MB.

Tha question: how do I change block size for nas2?

I suppose:

- in vcenter go to Configuration->Storage

- right click on nas2 and choose delete (nas2 is actually empty)

Is this correct?

But after that? How do I re-create the new storage?

Thanks

[aravinds3107]

Welcome to the Communities..

If the datastore is empty and then you could just format and re-cerate the new datastore with new block size.

The option which you said for deleting is correct

To re-add datastore follow this section Create VMFS Datastore

[massimofabbri]

Thanks for your reply.

I already knew the documentation article you suggested; my problem is point 5: "Select a device to use for your datastore and click Next".

How do I choose the correct device? Will the wizard show me only the formatted space of the Buffalo storage or do I have to specify it by IP or any other identificator?

Another question about the delete of the actual datastore: Buffalo's Tera-nas-03 (the partition I'd like to reformat) is empty, but is a datastore listed in both my hosts.

It makes no difference which host I select to right click and delete, or do I have to do the procedure for both hosts?

(maybe it's a silly question, but cluster is in production, I have no experience in Vmware and I really want to be careful)

Thanks

[aravinds3107]

Buffalo's Tera-nas-03 (the partition I'd like to reformat) is empty, but is a datastore listed in both my hosts.

Delete on one of the host, once deleted a rescan will be initiated automatically and you will datastore is missing on both host

Select a device to use for your datastore and click Next".How do I choose the correct device

Only the unformatted lun would be visible

[massimofabbri]

Thanks!

I'll try in the next days.