Element Address Set to zero to indicate that Ultrium tapes only support a single element.
Element Type Code Set to zero to indicate that Ultrium tapes only support a single element.
Volume Number Set to zero to indicate that Ultrium tapes only support a single volume.
Partition Number Set to zero to indicate that Ultrium tapes only support a single partition.
First Attribute ID The identifier of the first attribute to be returned. This field is not checked if the Service Action value is 01h (Attribute List). If the attribute does not exist in MAM but there are more attributes available after it, the data returned will contain the values of those attributes. Otherwise CHECK CONDITION is returned with ILLEGAL REQUEST sense.
Allocation Length The maximum amount of data (in bytes) that will be returned to the host. The drive will return the entire list of values or Allocation Length bytes, whichever is the lesser.
Returned data for service actions:
Attribute Values service action
This service reads the values of attributes for the specified volume and partition, starting at the First Attribute ID. The attributes are returned in ascending numerical order. The format of the returned data is as follows:
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| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
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| a |
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m
n
Attribute ID x
The Available Data field contains the number of bytes of attribute values returned. Even if the data returned has to be truncated because the Allocation Length is too small, the contents of the Available Data field remain the same.
For details of the available attributes and the format of the data returned for each, see “MAM attribute data” on page 115.
112 Commands