Dell EMC Unity: Replication session in degraded state when destination pool is full (User Correctable)
Summary: "Cannot update destination because destination pool is full"
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This article does not apply to
This article is not tied to any specific product.
Not all product versions are identified in this article.
Symptoms
When trying to create an Asynchronous Replication session on a thick resource, Unisphere prompts an error message:
"Cannot update destination because destination pool is full"
You'll also be able to see this in Unisphere's Alerts in the GUI or in EMCSystem.log in CLI:
"[WARN] User: Replication session rep_sess_res_3_res_12_CKMXXXXXXX_CKMYYYYY can not update destination because destination pool is full."
"[WARN] User: Replication session rep_sess_nas_2_nas_6_CKMXXXXXXX_CKMYYYYY can not update destination because destination pool is full."
"[WARN] User: Replication session rep_sess_nas_2_nas_6_CKMXXXXXXX_CKMYYYYY can not update destination because destination pool is full."
Note:
If the error occurring is specifically "Destination Pool Out Of Space (0x840f)", please refer to Article Number 000537516.
Cause
This is function as design for Asynchronous Replication on thick storage resources.
The storage resource and its snapshot will each take respective space in the destination pool during the initial copy.
This is not applicable for Synchronous Replication and doesn't require to double capacity at the target when the initial copy is ongoing.
The storage resource and its snapshot will each take respective space in the destination pool during the initial copy.
This is not applicable for Synchronous Replication and doesn't require to double capacity at the target when the initial copy is ongoing.
Resolution
The issue only occurs to thick storage resources with Asynchronous Replication environments only.
To avoid excessive space used for the initial copy, please create Asynchronous Replication sessions on thin storage resources or use Synchronous Replication.
Alternatively, if the storage resources are block ones (LUNs) they can be Move as "Thin" locally in order to change its provisioning (not supported for File Systems - Article Number 000529907)
If the Asynchronous replication is already in place or intends to be created on thick storage resources, please make sure the pool on the Destination Array has enough space (at least twice the replicated resources) to prevent its pool from filling up.
To resolve already full Storage Pools on a Destination Array, please expand the Storage Pool.
To avoid excessive space used for the initial copy, please create Asynchronous Replication sessions on thin storage resources or use Synchronous Replication.
Alternatively, if the storage resources are block ones (LUNs) they can be Move as "Thin" locally in order to change its provisioning (not supported for File Systems - Article Number 000529907)
If the Asynchronous replication is already in place or intends to be created on thick storage resources, please make sure the pool on the Destination Array has enough space (at least twice the replicated resources) to prevent its pool from filling up.
To resolve already full Storage Pools on a Destination Array, please expand the Storage Pool.
Affected Products
Dell EMC Unity FamilyProducts
Dell Unity 300, Dell EMC Unity 300F, Dell EMC Unity 350F, Dell EMC Unity XT 380, Dell EMC Unity XT 380F, Dell EMC Unity 400, Dell EMC Unity 450F, Dell EMC Unity XT 480, Dell EMC Unity XT 480F, Dell EMC Unity 500, Dell EMC Unity 500F
, Dell EMC Unity 550F, Dell EMC Unity 600, Dell EMC Unity 600F, Dell EMC Unity XT 680F, Dell EMC Unity XT 880, Dell EMC Unity XT 880F, Dell EMC Unity Family |Dell EMC Unity All Flash, Dell EMC Unity Family, Dell EMC Unity Hybrid
...
Article Properties
Article Number: 000063260
Article Type: Solution
Last Modified: 12 ديسمبر 2025
Version: 3
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