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- I use the RX50DRVR on my AT which allows my 1.2 MB drive to read RX50
- diskettes. What this does is to create a new driveletter (F:) which
- spins the HD drive as if it were an RX50 drive.
-
- RX50DRVR does not know anything about the directory structure on
- the disks. If I do 'dir F:' it assumes DOS directory structure,
- which works fine on Rainbow diskettes, since they use the DOS
- directory structure.
-
- To read RT11 formatted diskettes, there is a utility called RT11
- which groks the RT11 file structure. I have not yet found a similar
- utility which handles the RMS-11 file structure of the PRO 3xx series.
-
- I can use Norton Utilities with RX50DRVR to examine the RX50 diskette
- in the F: drive, but then I am accessing the diskette sector by sector,
- not by logical file.
-
- I haven't explored the new utilities from the gentlemen in the Former
- Soviet Union who have announced some DOS environment tools for
- manipulating RX50 diskettes.
-
- Using RX50DRVR in combination with the RT11 utility program, I can
- low-level format a blank HD diskette as an RX50 diskette, then
- put it in the PRO and do a high-level RMS-11 style Initialization.
- This allows me to create new RX50 diskettes out of plain old unformatted
- or recycled 1.2 MB HD diskettes.
-
- Using Venix on the PRO, I can do a raw image copy of a diskette in one
- drive to a blank diskette in another drive. (This kind of copy will fail
- if the target diskette has any bad sectors, since there is no attempt
- to rearrange sectors to detour around any bad blocks.)
-
- Finally, by hooking up the PRO to a Unix or DOS machine via the
- COM port (or to a Unix host via Ethernet/DECnet if you have a DECNA
- card), you can transfer files via any number of techniques, ranging
- >from straight ASCII upload/capture using ordinary terminal emulators,
- Kermit file transfers if you have Kermit on both machines, or by
- DECnet file transfer using NFT or dcp utilities.
-
- None of this is particularly trivial to implement, but the bottom
- line is that there are many ways to pull files off RX50 diskettes
- and transfer them to Unix or DOS machines.
-
- Barry Kort
-
-