ADC: MUP desired behavior

Paul.A.Suhler at certance.com Paul.A.Suhler at certance.com
Wed Mar 2 09:57:41 PST 2005


* From the T10 Reflector (t10 at t10.org), posted by:
* Paul.A.Suhler at certance.com
*

Hi, Kevin.

My opinion is that if the drive (not automation) front panel allows
confirmation that the inserted cartridge is indeed a microcode cartridge,
then that should be considered equivalent to setting the MUE bit and the
update should proceed.  I guess that means that the protection is against
your first option, automated insertion, although "unconfirmed insertion"
might be a better term for what's being prevented.

Perhaps in ADC-2 we should amend the description to include means beyond
the scope of the standard, blah blah blah.

Cheers,

Paul
+++++++++++++++++++++++++
Paul Suhler
Firmware Engineer
Quantum Corporation
1650 Sunflower Avenue
Costa Mesa, California  92626
(714) 641-2485 (voice)
(714) 966-7328 (fax)


                                                                                                                                       
                      "Kevin D Butt"                                                                                                   
                      <kdbutt at us.ibm.co        To:       t10 at t10.org                                                                   
                      m>                       cc:                                                                                     
                      Sent by:                 Subject:  ADC: MUP desired behavior                                                     
                      owner-t10 at t10.org                                                                                                
                                                                                                                                       
                                                                                                                                       
                      03/02/2005 07:37                                                                                                 
                      AM                                                                                                               
                                                                                                                                       
                                                                                                                                       





ADC guru's,

The MUP bit is defined as:
<< A microcode update protect (MUP) bit set to one shall prevent the DT
device from performing a microcode update process upon the loading of a
medium containing a microcode image. A MUP bit set to zero shall not
prevent the DT device from performing a microcode update process upon the
loading of a medium containing a microcode image. >>

Is the intent of this bit only to protect against automated insertion or is
it also intended to protect against manual attempts such as through a drive
maintenance panel (i.e. A user manually sets the drive for a ucode update
through a drive panel and then a cartridge is inserted)?

Thanks,

Kevin D. Butt
Fibre Channel & SCSI Architect, IBM Tape Firmware,
6TYA, 9000 S. Rita Rd., Tucson, AZ  85744
Tie-line 321; Office: 520-799-5280, Lab: 799-5751, Fax: 799-4138, Email:
kdbutt at us.ibm.com





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