![]() The basic rules of thumb for 3.5” drives are: Problems can also arise when overwriting data on a DD-formatted floppy using an HD drive it’s always better to “write from blank”. Problems arise when using a DSHD floppy in a DD drive: it is possible to format a DSHD floppy using a DD format, but if the floppy was ever formatted with an HD format (or was pre-formatted, as was common in the late 90s), a DD drive won’t be able to correctly reformat it (because its write signal isn’t strong enough). HD drives can adjust their field strength to write appropriately, so an HD drive can write to a DD floppy without creating issues. ![]() DSDD and DSHD floppies use different metals, with different coercivities. The main concern with non-LS 3.5” floppies is the metal used in the medium. SuperDisk drives can be ignored as far as backwards-compatibility is concerned: they have two head assemblies, one for “standard” formats, the other for LS formats, and the “standard” head is equivalent to a high-density 3.5” drive’s. Your actual device name may be different.I’ll limit my answer to common 3.5” formats on PCs, DSDD, DSHD, and SuperDisk, as listed in your question. In the following examples, the floppy disk drive device name is given as /dev/rdsk/fds0d3.3.5. The tar, cpio, and dd tools are usually available on all UNIX systems. Also, whenever possible, change directories to the directory that contains the file and place the file on the floppy disk using a relative pathname, rather than specifying the absolute pathname.Īlso be aware that using a floppy disk to transfer files to systems made by other manufacturers may mean that the same tools are not available on the receiving system. This makes it easy for you (and others) to retrieve the files from the floppy disk. When you place files on a floppy disk, make a note on the disk label of the format or the exact command used to place the files on the floppy disk. ![]() See the mkfp(1M) reference page for additional information. Use the mkfp command to format an unformatted floppy. Use the standard tape archive commands to write files to the floppy disk if the disk is formatted. You can use a floppy disk drive like a tape drive for IRIX file transfer. Using a Floppy Disk Drive for IRIX File Transfer ![]()
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