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Compaq FTAM Responder Support of
ISO FTAM Functions
OSI/FTAM Responder Manual—425199-001
4-16
Storage Group File Attributes
filesize parameter is not specified in a create request, the responder creates a file with a
future-filesize value of 8 MB.
Subsequent change-attribute requests can change the value of max-extents. In all cases,
the minimum value of max-extents is 16, and the maximum value is 978. The extent
size cannot be changed.
Because of file-size limitations imposed by the Guardian file system, the Compaq
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.) No diagnostic message is returned in this
case.
Note that the maximum size of files is limited by the physical storage capacity of the
Compaq disk device being used. If an application attempts to write to a Compaq
responder a file larger than 1 GB or larger than the disk device can hold, a file-system
error 43 (unable to obtain disk space for file extent) will eventually occur in a WRITE
call, and the Compaq responder will send a cancel to the application.
Table 4-11 summarizes the Compaq support for the storage attributes.
Table 4-11. FTAM Storage Attributes and Corresponding Compaq File
Attributes
Storage
Attributes Level of Support Compaq File Attributes
Storage account Partial
Date and time of
creation
Partial if protected by
Safeguard security software;
Full if protected by Guardian
environment
creation date-time for files other than
NBS-9; current time for NBS-9
Date and time of
last modification
Partial if protected by
Safeguard security software;
Full if protected by Guardian
environment
last modification date-time for files other
than NBS-9; current time for NBS-9
Date and time of
last read access
Partial if protected by
Safeguard security software;
Full if protected by Guardian
environment
last open date-time for files other than
NBS-9; current time for NBS-9
Date and time of
last attribute
modification
Partial