MSS writes data sets to physical files on the PC and UNIX using the following organization and record format mapping:
| Mainframe | Physical File | |||
|---|---|---|---|---|
| Data Set Organization | Record Format | File Organization | Record Format | Comment |
| DA, DAU, PS, PSU | Any fixed (Fnn) or variable (Vnn) format | Sequential | Micro Focus | |
| DA, DAU, PS, PSU | LSEQ | Line sequential | Micro Focus | Always uses ANSI character set. Can only be edited with a text editor |
| GDG | Catalog entry only | |||
| IS, ISU | Any fixed (Fnn) or variable (Vnn) format | Indexed sequential | Micro Focus | |
| PDSM | Any fixed (Fnn) or variable (Vnn) format | Sequential | Micro Focus | |
| PDSM | LSEQ | Line sequential | Micro Focus | |
| PO, POU | Catalog entry only | |||
| VSAM | ES | Sequential | ESDS | |
| VSAM | ES | Indexed sequential | ESDS | Alternate index defined |
| VSAM | KS | Indexed sequential | Micro Focus | |
| VSAM | LS | Not supported | ||
| VSAM | RR | Relative | Micro Focus | |