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What does rezero do in robtest?

Created: 10 May 2013 • Updated: 30 Jun 2013 | 2 comments
This issue has been solved. See solution.

Does anyone know what the command "rezero" do in the robtest utility? I cannot find any information or documentation.

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mph999's picture

It send a scsi command descriptor block 0x01, which to be more helpful simply Initializes (resets) the library.

What the reset actually does, is down to the firmwre on the library, and as far as I know, we hold no documentation on this.

Martin

Regards,  Martin
 
Setting Logs in NetBackup:
http://www.symantec.com/docs/TECH75805
 
Nicolai's picture

Just to support Martin very fine post:

From Oracle SCSI documentation for L20/L40/60:

http://docs.oracle.com/cd/E19827-01/CRCM2231/CRCM2231.pdf

The Rezero Unit command (01h) performs no actions. The library accepts this 

command only for compatibility with existing host applications.
 
and a example form Plasmon:
 
 
The Rezero Unit command reinitializes the medium changer device. Then, depending upon the
ChgrEjects and LmtErrRec bits in the Mode Select Vendor Unique Mode Parameter Page (see Section
10.7.1), cartridges in the medium transport element and loaded data transfer elements (optical drives)
may be put back in the storage elements from which they originally came. The medium changer device
will then go to its home position. 
 
As you can see the implementation of the command is completely different from vendor to vendor (or from firmware to firmware).

Assumption is the mother of all mess ups.

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