Hi, Page 64 https://topics-cdn.dell.com/pdf/storage-sc2000_administrator-guide_en-us.pdf shows some steps for clearing emergency mode.

Thanks for your response.

I've already been there: I have deleted my unnnecessary volumes; I have no snapsots; and I'm using ESXi not Windows. So is the only way out to delete my necessary volumes? And what will happen if I do that and then rebuild? Why aren't the new disks being used?

Please call Dell Support.

We have often to Deal with SCv which runs out of free space. As a partner we provide some "emergency" spare disks to our customers in such cases. But it always needs Dell support to move around the blocks.

We have seen older SCOS version which doesnt free up unused blocks or have a huge amount of blocks allocated.

Regards,
Joerg

Good afternoon, The page you are referring to doesnot exist.

We are also stuck in emergency mode and try to delete the only snapshot on the volume.
When we hit the Expire button to release some space, nothing happens.
Hope you can help us out.

Dell SVC2020

MichelLotze,

I am showing that the link is working, but just in case you can find the link here. 

Let us know how it goes after the steps on page 64.

Thanks for your response! But the link to the administrator guide doesn't work for us.

Could you just copy the content of the page here? or mail me the guide: 

Thanks in Advance

This is page 64.

Emergency Mode
Storage Center enters Emergency Mode when the system can no longer operate because it does not have enough free space.

In Emergency Mode, Dell Storage Manager Client responds with the following actions:
• Generates an Emergency Mode alert.
• Expires Snapshots at a faster rate than normal.
• Prevents new volume creation.
• Volumes are taken offline. Data cannot be written to or read from volumes.

To support recovery efforts, volumes can respond to Space Recovery requests from the server or Storage Manager to release
unused blocks of data.

CAUTION: Because Emergency Mode prevents all server IO, Emergency Mode is service affecting. Administrators must
take special care to continually monitor free space on the Storage Center and add or free up space as needed to avoid
reaching the Emergency Mode threshold.

Troubleshoot Conservation or Emergency Mode
To resolve conservation or emergency mode, reclaim consumed disk space.
About this task
Perform each step, then wait a few minutes and check available disk space.
Steps
1. Delete any unnecessary volumes and then empty the recycle bin.
2. Expire unnecessary Snapshots.
3. If applicable, run a manual space recovery on Windows server volumes.

Next step

If these steps do not resolve conservation or emergency mode, contact Dell Technical Support.

Preventing Low Space Modes
Manage disk space to prevent a Storage Center from entering Conservation or Emergency mode.

Prevent low space issues using these tips:
• Empty the recycle bin regularly.
• Lower the frequency of snapshots or set snapshots to expire earlier.
• Change the storage profile to a more space efficient profile. Available profiles might include Low Priority (Tier 3) and Maximize
Efficiency.
• Configure a threshold definition to create an alert when space starts to get low.
• Run Space Recovery on Windows volumes through the Storage Manager Server Agent.
• Migrate volumes from a pagepool with a full tier to a different pagepool with more free space.
• Delete any unnecessary volumes.
• If Data Reduction is licensed, enable Compression or Deduplication with Compression on some volumes.

That's a quote from the manual... the question remains, how do I get it back online to erase some unnecessary data? When the LUNS are all offline, I cannot access them from the server. Is the only solution of the problem to add more disks and expand the volumes?

Since my system was just on test in the workshop, I simply restored factory defaults. This is of course no solution if there is valuable data on the volumes...