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Dataset and HFS File System Access
z/OS has both MVS datasets, and Hierarchical File System (HFS) files. As both types must be accessed by the SFTP server, there must be a mechanism for distinguishing between them. Traditionally, MVS datasets in z/OS are accessed using the filename format //'NAME.OF.MVS.DATASET', while HFS files are accessed using the filename format /path/to/hfs/file.
In z/OS, if a dataset name is not enclosed in single quotes, the user prefix is added in front of the dataset name. For example, if user USER1 has a dataset DATASET.NAME1, the user can access it using the dataset name //DATASET.NAME1. It is also possible to use an absolute prefixed name //'USER1.DATASET.NAME1'.
z/OS has also library datasets, whose members are accessed using the dataset name //DATASET.NAME1(MEMBER1).
SSH Tectia Server for IBM z/OS will not mount volumes or consider off-line devices when accessing datasets, instead it will issue an error message if the dataset is in the catalog but the volume is not available.
Case-Sensitivity of HFS and MVS Names
HFS file names are case-sensitive. For example, /tmp/MYFILE and /tmp/myfile result in two different files.
MVS dataset names are case-insensitive. For example //'USER1.DATASET.NAME1' and //'user1.dataset.name1' are handled the same way.
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