Conformance and Interoperatility | Limitations on Value of Future-Filesize Attribute |
Attributes
Aspects of attributes that can affect interoperability include the optional groups of attributes, the level of support for each individual attribute (see Table 4-4) and its optional components, and the range of values supported for each attribute. The Compaq FTAM implementation supports three attribute groups: kernel, storage, and security. For more information on attributes and attribute support for the Compaq FTAM responder, see Section 4.
FTAM Parameters
Aspects of FTAM parameters that can affect interoperability include the supported optional parameters and the range of values for all parameters. If they are to interoperate, both implementations must support all parameters and ranges required by the services to be performed. For more information on the optional parameters and parameter value ranges supported by the Compaq FTAM responder, see Section 4.
Limitations on Value of Future-Filesize Attribute
Because of file-size limitations imposed by the Guardian file system, the Compaq FTAM responder cannot support all possible values of the future-filesize attribute sent in create and change-attribute requests. The Compaq responder creates files with a maximum future-filesize value of 1 GB. If a value greater than 1 GB is requested, the responder returns an informative diagnostic message and creates the file with a future- filesize value of 1 GB.
The smallest file the Compaq responder can create has a future-filesize value of 64 KB. If a smaller future-filesize value is requested, the responder creates the file with a future- filesize value of 64 KB. (Note, however, that the entire 64K is not necessarily allocated; only as many extents as needed are allocated.)
In addition, the maximum size of files is limited by the physical storage capacity of the Compaq disk device being used.
Document Types and Related Parameters
Both implementations must support one or more common document types to interoperate. Compaq FTAM supports the following document types: FTAM-1, FTAM- 2, FTAM-3, and NBS-9. In addition, both implementations must be aware of how the parameters associated with document type (the maximum-string-length, string- significance, and universal-classparameters) are used in the FTAM software with which they wish to interoperate.
The NBS-9 document type allows reading of directory information using an attribute bit string.
For more information on Compaq FTAM document types and related parameters, see Section 4.
OSI/FTAM Responder Manual—425199-001
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