Hi all,
I'm trying to build a 03 node Oracle VM cluster on a Dell VRTX. In a previous question some people explained me that Oracle VM doesn't supported a DAS SAN (Directed Attached SAS SAN), so I'm thinking into some alternatives to build this 03 node cluster:
1. Assign the VRTX LUNS (02) to the third node and turn it into an "artificial" shared storage.
The third node would "share" those 02 LUNs to all three nodes (including itself) through iSCSI or NFS. My first attempt was to use NFS (it's simpler and it's available on the Oracle VM 3.4.1 vanilla install), so I accomplished the steps below:
A. Created a partition on the first LUN (1.7TB), fdisk /dev/sdb => n => p => 1 => Enter => Enter => w, everything worked as expected
B. When I tried to format /dev/sdb1, mkfs.ext4 /dev/sdb1 I got the error: /dev/sdb1 is apparently in use by the system; will not make a filesystem here! .I checked the mounted filesystems and /dev/sdb1 is not mounted at all, I "think" that Oracle VM somehow grabs all of the devices for local storage and due to this reason I'm not able to modify /dev/sdb1, so I'm stuck at this point. Just for information I've tried to issue the commands above using a ssh connection to the Oracle VM Server (no Oracle VM Manager at all)
2. My other alternative would be to install another hypervisor on the third blade (Hyper-V) and expose the 02 LUNs using a iSCSI target software like Starwind. Personally I don't like this option.
I know that this setup is not recommended, but I'm just researching some alternatives here.
The person at this link https://www.pythian.com/blog/oracle-vm-what-if-you-have-just-1-hdd-system/ did something "similar"
Thank you very much!
Marcos