Firmware upgrade to may cause Insufficient Cache Backup Device error and cache may become disabled – IBM System Storage DS3512, DS3524


When upgrading from 7.7x.xx.xx firmware to the firmware, the upgrade completes successfully, but an “Insufficient Cache Backup Device” message in the Recovery Guru may be logged. Other messages in the Recovery Guru such as “Write Cache Has Been Forcibly Disabled” may also be logged. If these messages appear, write cache will be disabled which will affect the performance of the subsystem. This problem does not cause data access or data loss issues.

This behavior has only been seen on some firmware upgrades of the DS3500 Storage Subsystem.

Affected configurations

The system may be any of the following IBM servers:

  • IBM System Storage DCS3700 Storage Subsystem, type 1818, any model
  • IBM System Storage DS3512, type 1746, any model
  • IBM System Storage DS3524, type 1746, any model

This tip is not software specific.

This tip is not option specific.

The firmware for the DS3500 is affected.

The following system firmware level(s) are affected:


The system has the symptom described above.


This behavior has been corrected in the release of the 7.83 firmware. This firmware is currently available only from IBM Support. If you would like to install this new firmware, please call IBM Support to request the latest version of the 7.83 firmware for the DS3500 or DCS3700.

If the firmware is not used to upgrade to the 7.83 release and this problem is encountered, please contact IBM Support for assistance with the recovery procedure.

When Generally Available, the firmware will be available by selecting the appropriate Product Group, type of System, Product name, Product machine type, and operating system on IBM Support’s Fix Central web page here


IBM recommends that the upgrade of a DS3500 or DCS3700 storage controller to the firmware be performed during a maintenance window or that the upgrade be postponed.

If the or later firmware is used, then the upgrade can be performed using standard upgrade processes.

Additional information

It is important to note that this issue is strictly a firmware upgrade issue. Once this upgrade issue has been corrected, the firmware operates as expected.

Leave a comment


  1. John Consalus

     /  October 9, 2012

    We just installed a new DS3524 with and still have this error. Called IBM Support to resolve.

  2. John Consalus

     /  October 9, 2012

    We just installed a new DS3524 with and still have this error. Called IBM Support to resolve.

    Update: problem fixed. Our VRAM chip had come loose during shipment!

  3. marco

     /  May 27, 2013

    hi sir we have problem regarding to DS3500 the firmware will need to updated im just to ask where can i get the latest firmware if DS3500.


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