Problem storage iscsi

[rspadar]

Hi, I have two ESX 5.5 servers, to which I added two network cards to connect a SAN that I previously used normally through the management network.

With the new network card I see the LUNs on the SAN but the procedure would make me lose all the data, not to see the VMFS datastore 5.

I have read several discussions about regenerating uuid but I can not solve the problem. Can someone help me?

Raffaele

[daphnissov]

but the procedure would make me lose all the data, not to see the VMFS datastore 5.

You'll have to explain this a bit more because it doesn't make a lot of sense. Can you provide more details on your environment and configuration?

[rspadar]

Hi,

my configuration is:

N. 2 server each server has:

vmnic0 MGMT (eth0)

vmnic1 DMZ (eth1)

vmnic2 MZ (eth2)

vmnic3 ISCSI (eth3)

N.1 Storage

nic0 MGMT

nic1 ISCSI

nic2 ISCSI

N. 2 Switch for ISCSI connection

If i use iscsi locked with vmnic3 see storage but not see VMFS 5 partition system say me formatting, if i use iscsi without network decicate work finebut  alfter many time hang all system

Raffaele

[daphnissov]

Sorry, still very difficult to understand your environment from that description. Can you show some screenshots?

[MohamadAlhousse]

Hi rspadar,

As I understand from your request, that the LUNs are already formatted however when you attempt to add them in the datastores, the "keep the existing signature" is grayed out and the only option you have is "format the disk" which will wipe all your data as in the below snapshot:

The solution to this is to mount the LUN manually via esxcli on each host, Please follow the below procedure:

1. SSH to your ESXi hosts via SSH client like "Putty" for example.

2. list any usable LUNs that are NOT mounted, if no LUNs are displayed it means all your LUNs have been mounted:

   esxcfg-volume -l

3. If you see any LUNs listed from the command above, type this to mount each LUN one at a time:

   esxcfg-volume -M "vmfs_label_name"

   the lable name should be the friendly name you gave the LUN when originally formatted.

Please let me know if this helpful,

Regards,