Avatar of EES2020
EES2020
 asked on

ESXI 5.1

Hello,

After a major storm that knocked out power for miles, I come to notice our esxi server no longer works. I am getting the nasty purple screen of death.

With the following error.
the system has found a problem on your machine and cannot continue
Could not mount /dev: Not found

In an attempt to try to upgrade, the installer warned that it could not save my datastore and that I should move the data to another datastore. But I dont know how without an operating esxi.

Please tell me theres a fix for this. If not how can I pull the data from the machine. I realized the latest backups that I have were on one of the VMs not yet transferred off :(

Thanks
VMware

Avatar of undefined
Last Comment
EES2020

8/22/2022 - Mon
Zephyr ICT

Could not mount /dev: Not found
Now, hopefully I'm wrong, but this could mean that your filesystem/installation got corrupted or perhaps even mean a crashed disk or damaged parition...

So the question is, even if you were able to retrieve VM's of the datastore, will they be ok or also corrupted....

I'm guessing this is a standalone ESXi server with local storage?? How is the storage configured, RAID1/10/5/6?
EES2020

ASKER
Hi spravtek

It is a RAID 10 setup. The G8 server did not report any kind of raid failure. And you are correct, this is a standalone Esxi server.
Andrew Hancock (VMware vExpert PRO / EE Fellow/British Beekeeper)

Check

1. RAID Configuration is correct with ACU.

2. Where did you install ESXi ?

on the disks ? on the array ? on a USB flash card/SD card?

3. Do you have backups of VMs ?
All of life is about relationships, and EE has made a viirtual community a real community. It lifts everyone's boat
William Peck
EES2020

ASKER
Hi Andrew
This is a production server that has been running fine since 2013. The RAID array is healthy. Configuration is fine.  The ESXI is installed on the array. Sadly, the backups resided in that datastore---mistake.....the sheer size and nature of the Vms made dealing with the data problematic.
ASKER CERTIFIED SOLUTION
Andrew Hancock (VMware vExpert PRO / EE Fellow/British Beekeeper)

THIS SOLUTION ONLY AVAILABLE TO MEMBERS.
View this solution by signing up for a free trial.
Members can start a 7-Day free trial and enjoy unlimited access to the platform.
See Pricing Options
Start Free Trial
GET A PERSONALIZED SOLUTION
Ask your own question & get feedback from real experts
Find out why thousands trust the EE community with their toughest problems.
EES2020

ASKER
I mean I can see the drive that contains my VMFS volume member. It reports at /dev/sda1
So I dont understand why Esxi is reporting it cant mount /dev: not found
EES2020

ASKER
Yes, I tried recovery mode, all it says is there are no other hypervisors avail. Im going to try the two methods you suggested. The second one just might work. Thanks.
⚡ FREE TRIAL OFFER
Try out a week of full access for free.
Find out why thousands trust the EE community with their toughest problems.
Andrew Hancock (VMware vExpert PRO / EE Fellow/British Beekeeper)

ESXi does boot ?

you can get on the console ?
Zephyr ICT

Yes, I'm with Andrew for the idea to boot of a USB stick with ESXi installed on it, or try to re-install ESXi via USB and see if it can find the datastore...

Could you perhaps get a screenshot of the purple screen?
EES2020

ASKER
Andrew, I followed your second option. I got a new exsi booted from USB and was able to see the data perfectly. Clever on the datastore. I don't know why it didn't come to mind! The original esxi install must have been very corrupt to not want to upgrade!!! High volume office and the server is too expensive to replicate. So it ran 5.1 for 2 years.

Thanks again, you saved me 50,000 dollars or more. Must be more safe and more redundant. Lesson learned big time.
Experts Exchange has (a) saved my job multiple times, (b) saved me hours, days, and even weeks of work, and often (c) makes me look like a superhero! This place is MAGIC!
Walt Forbes
EES2020

ASKER
Thanks both of your efforts for helping me. It was a highly stressful situation.