The Backup Exec Command Line Applet (BEMCMD) will not permit more than one BackupToDisk Device setting to be enabled at the same time.

Article:TECH88161  |  Created: 2009-01-30  |  Updated: 2014-07-07  |  Article URL http://www.symantec.com/docs/TECH88161
Article Type
Technical Solution

Product(s)

Issue



The Backup Exec Command Line Applet (BEMCMD) will not permit more than one BackupToDisk Device setting to be enabled at the same time.


Solution



The Backup Exec Command Line Applet (BEMCMD) will not permit more than one BackupToDisk Device setting to be enabled at the same time.

How to create or modify Backup-to-disk folders using BEMCMD is documented more in the Backup Exec Command Line Applet Guide. See Related Documents.


Using the BEMCMD -o116 or -o119 parameters, it is possible to create or modify Backup-to-disk folders and their settings. The -e switch for these parameters configures the Device Settings to Auto Detect or Buffered Read and\or Buffered Writes.

 
Create a backup-to-disk folder     -o116 <switches>  -f<folder name> -d<directory>
 
                                   (Switches:  -s<max b2d file size>  -q<max number of backup sets> -k<reserve disk space> -e<device settings> -m<number of concurrent ops> -r )
 
                                   ( -e switch options: 0 = Auto Detect settings. Backup Exec decides;  1 = Buffered Reads;  2 = Buffered Writes. 1 & 2 allow use of large data blocks)  
 


If a Backup-to-disk folder is created or modified via BEMCMD, it is not possible to have both 'Buffered Reads' and 'Buffered writes' enabled at the same time. A single -o116 or -o119 parameter command will read only the last -e switch setting, if more than one are given. It is also not possible to enter multiple values against a single -e switch.
Attempting to modify a Backup-to-disk folder using the -o119 parameter, with an -e switch, will remove the previous device settings, leaving only the most recent setting.

Example:
A Backup-to-disk folder has been created with 'Buffered reads' (-e1) enabled. If you attempt to enable 'Buffered writes' as well, using the -e2 switch, the BEMCMD result will be successful, but the folder will now only have 'Buffered writes' enabled.
The Backup Exec console (GUI) will confirm this in the Properties of the Backup-to-disk folder  


Workaround/Resolution:

 
For Backup Exec for Windows 12.5
 

To change the Buffered device settings, please use the Advanced tab of the Backup-to-disk folder Properties, in the Devices tab of the Backup Exec console (GUI), as shown below.
From here it is possible to enable both 'Buffered reads' and 'Buffered writes' at the same time. If the 'Auto Detect' option is enabled, both the 'Buffered reads' and 'Buffered writes' tick boxes will become grayed out.

 


 
For Backup Exec 2010;
 
This has been resolved in Backup Exec 2010 for Windows Servers revision 2896 Hotfix 344584. You can download the patch from here:  www.symantec.com/docs/TECH126191




 

 

 

Supplemental Materials

Value1907928
Description

BEMCMD: B2D create\modify with -o116\-o119, using -e switch will not permit more than one Buffered setting to be active at once.


Value1914984
Description

BEMCMD: B2D create\modify with -o116\-o119, using -e switch will not permit more than one Buffered setting to be active at once.



Legacy ID



337921


Article URL http://www.symantec.com/docs/TECH88161


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