PowerStore: Pre-Upgrade Health Check (PUHC) detects volumes of 4096 VOLUME SECTOR SIZE being replicated over iSCSI protocol

Summary: Pre-Upgrade Health Check (PUHC) detects if there are volumes of 4096 bytes VOLUME SECTOR SIZE being replicated over iSCSI protocol.

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Symptoms

The PowerStore health check (PUHC) may fail the iSCSI replication block size (off release check) validation, with the following error: "The volumes with block size 4KB are replicated over iSCSI connection. Please change the connectivity protocol to TCP. (off_release_check_iscsi_rep_block_size_failed)"

In the PowerStore Manager Upgrade window the detection of this issue appears as follows: 
details:
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Details:
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Cause

PowerStoreOS 3.5.0.x (and greater) do not handle replication of volumes of a 4k sector size properly if the transport protocol in use is iSCSI. Volumes with a 4k sector size replicate properly between clusters if the transport protocol in use is defined to use TCP (iBasic).

Resolution

Configure PowerStore to use the connectivity type of TCP (iBasic) for volumes with a 4k sector size.

If assistance is required, contact Dell Technical Support for assistance. Reference this KB Article for expedited handling. 

Additional Information

KB 000192601 PowerStore: How to Check the Health of the Cluster Before Software Upgrade Using Pre-Upgrade Health Check and System Check.

KB 000214752 PowerStore: Landing Page for In Market (off-release) System Health Checks lists all the health checks in the Health Check thin package.

Affected Products

PowerStore
Article Properties
Article Number: 000221547
Article Type: Solution
Last Modified: 14 Jun 2025
Version:  5
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