[Last Call] Learn how to a build a cloud-first strategyRegister Now

x
?
Solved

Datastore disappeared after Logical Disk resize on ESXi 5

Posted on 2014-02-16
9
Medium Priority
?
627 Views
Last Modified: 2014-02-27
As mentioned in Question Q_28363425, I migrated a RAID Array from RAIS 1+0 to RAID 5. After it's completion I extended the Logical Disk from roughly 1.8TB to 2.8TB (4x 1TB disks approx).
Now the datastore is gone and not viewable in ESXi.
Looking back I now realise that what has happened is that as the original Logical Disk was in MBR, that now it's over the 2TB limit it's unreadable... Is there any way to revert it or change it without data lost??
0
Comment
Question by:kiwistag
  • 5
  • 3
9 Comments
 
LVL 124
ID: 39862446
ESXi 5.0 is not limited to 2TB VMFS datastores anymore, it's 64TB

see here

https://www.vmware.com/pdf/vsphere5/r50/vsphere-50-configuration-maximums.pdf
0
 
LVL 6

Author Comment

by:kiwistag
ID: 39862516
.. For a GPT disk yes, but as the disk/partitions are still in MBR I'm in trouble.
This system is an upgrade from ESXi 4.1 so doesn't have a GPT format (let alone UEFI).
0
 
LVL 6

Author Comment

by:kiwistag
ID: 39862521
gPartEd sees all partitions which is a start. I'm looking at here for assistance..
https://communities.vmware.com/thread/412601
0
Granular recovery for Microsoft Exchange

With Veeam Explorer for Microsoft Exchange you can choose the Exchange Servers and restore points you’re interested in, and Veeam Explorer will present the contents of those mailbox stores for browsing, searching and exporting.

 
LVL 124
ID: 39862539
Okay, this was VMware vSphere 4.0 partition before. You question title suggests ESXi 5.0.

This is the issue.

Has the partition been expanded, as you have just expanded the logical disk?

I would shrink back the VMFS partition, to under 2TB if possible.

Did you take backups before the alteration?
0
 
LVL 6

Author Comment

by:kiwistag
ID: 39862602
The system has been ESXi for the last year, however beforehand was ESXi 4.1.
The logical disk has been expanded to 3TB, but the partition has not.
The VMFS partition is 1.8TB still, however ESXi 5 cannot read it in this state, I can only assume that as the (RAID LV) disk is bigger than 2TB and it is not GPT that ESXi doesn't know how to read it.
By using the MightyCare Recovery Disk, with it's later FUSE system supporting VMFS-5, I can now read the disk.
I'm copying it now to a NFS share (via SCP - since there are issues with our NAS/SAN and the Linux NFS version it seems), but at 5MBps it's going to be slow copying a main VM of 1.4TB... :/

As for backups, it looks like 1x didn't take and the other one (split-site) is 4-5 days old..

The other VM on there hasn't backed up successfully this week also. At least it's not as mission critical..
0
 
LVL 124
ID: 39862651
I think your solution is this is the best course of action, rather than meddle with the logical disk!
0
 
LVL 6

Assisted Solution

by:kiwistag
kiwistag earned 0 total points
ID: 39864139
It looks like files over 150GB(ish) can't be easily copied. So far through Linux via cp or ftp I get an I/O error.
SCP works but is phenominally slow (1-6MBps max) and from experience seems to time out.
I'm trying dd  from the logical disk to a iSCSI disk.
0
 
LVL 17

Accepted Solution

by:
Gerald Connolly earned 1500 total points
ID: 39864187
A classic example of why you should always take a backup before changing things - Just in case

and always make its a viable backup!
0
 
LVL 6

Author Closing Comment

by:kiwistag
ID: 39891396
Solution is the prevention in a way, ensure backups are consistent.
The recovery was a rather extended process in this scenario.
0

Featured Post

Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Giving access to ESXi shell console is always an issue for IT departments to other Teams, or Projects. We need to find a way so that teams can use ESXTOP for their POCs, or tests without giving them the access to ESXi host shell console with a root …
It’s time for spooky stories and consuming way too much sugar, including the many treats we’ve whipped for you in the world of tech. Check it out!
Teach the user how to join ESXi hosts to Active Directory domains Open vSphere Client: Join ESXi host to AD domain: Verify ESXi computer account in AD: Configure permissions for domain user in ESXi: Test domain user login to ESXi host:
Advanced tutorial on how to run the esxtop command to capture a batch file in csv format in order to export the file and use it for performance analysis. He demonstrates how to download the file using a vSphere web client (or vSphere client) and exp…
Suggested Courses

834 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question