After increasing the buffer size setting on a Disk Storage Device in Backup Exec 2012 and restarting the service the Buffer size reverts back to default value of 64K. Figure 1
NOTE: Block Size is not affected. Changing the block size on the Disk Storage Location and restarting the Backup Exec service will not revert to the default setting of 1kb.
Using the Backup Exec 2012 BEMCLI interface to set the Buffer Size produced the same behavior. After the Backup Exec service are restarted the Buffer Size reverts back to 64k.
A hotfix is now available for this issue in the current version(s) of the product(s) mentioned in this article. Refer to the Hotfix link under Related Articles at the end of this article to obtain the hotfix needed to resolve the issue.
Backup Exec 2012 Rev 1798 Hotfix 201596. Device Driver Installer DDI20121215 (December 15th, 2012) (TECH201596)
Backup Exec 2012
Disk Storage Devices