comments on X3T10/94-031 SCSI-3 Logical Unit Addressing

[Doug, dtn 237-2145 Flames to NL: 02-Mar-1994 1431]

Here are a couple of things I noticed while reading 94-031r1 recently.
Mostly editorial, and I think some of these were noticed at the
RAID meeting last month.




>   An Active bit of zero indicates the translation table shall
>   not be used.  An Active bit one indicate that the translation
>   table shall be used to determine to which bus/target/LUN to
>   send the command.

How about: "An Active bit of one indicates that..."


>   A VolSel bit of zero specifies that a SDA peripheral device
>   type shall use the LUN as either a reference into the LUN
>   mapping mode page (if the active bit within the LUN mapping
>   mode page is set to one) or as the address of a P-LUI within a

The text switches back and forth between "LUN mapping mode page"
and "translation table". In this case I think it should be:

"...reference into the LUN translation table (if the active bit within
the LUN mapping mode page is set to one)..."



>   A VolSel bit of one specifies that a SDA peripheral device
>   type shall use the LUN as the address of a V-LUI controlled by
>   the SDA.

Add: "The value of the Active bit in the LUN translation table
is disregarded."


>   Layer 4   M:P:T or M:L or u
>
>   Where:
>      M is the Address Method (2 bit field)
>      P is the Bus Number (6 bit field)
>      T is the Target (8 bit field)
>      L is the Logical Unit Number (14 bit field)
>      u is means unused and set to zero (16 bit field)

Change "P" to "B". It's used that way later anyway... Or at least
make it the same throughout. Also I think that the last line should be:

"u is unused and must be set to zero (16 bit field)"



>   Example 5:
>
>   Addressing an SDA at the second layer of the hierarchy.  Note
>   that the second layer SDA is also a physical target on the
>   first layer path.  In this example the SDA is on the fourth
>   path and third target address.
>
>   Layer 1   1:4:2
>   Layer 2   0:0:0
>   Layer 3   u
>   Layer 4   u


I believe that layer 1 should be 0:4:2.