Dell EMC Unity: Dell-EMC-Unity how to change "PAX readWriteBlockSize" parameter for NDMP backup (User Correctable)
This article applies to
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
An error from backup side "Specified record size (262144) is bigger than readWriteBlockSize (65536), please refer to user document on how to increase param PAX.readWriteBlockSize,
please refer to user document on how to increase param PAX.readWriteBlockSize".
Resolution
Change parameter called readWriteBlockSizeInKB this parameter is to Specify the maximum allowed PAX buffer size for NDMP read/write in kilobytes.
Affected Products
Dell EMC Unity FamilyProducts
Dell EMC Unity FamilyArticle Properties
Article Number: 000063258
Article Type: Solution
Last Modified: 12 Dec 2025
Version: 3
Find answers to your questions from other Dell users
Support Services
Check if your device is covered by Support Services.