Magnetic tape filesystem

Tom Sparks tom_a_sparks at
Mon Feb 9 14:26:53 CST 2015

On 09/02/15 20:29, Johnny Billquist wrote:
> On 2015-02-09 02:16, Mark J. Blair wrote:
>> This may not be close enough to what you're looking for, but DEC put
>> the RT11 filesystem on TU58 tapes. They could be used just like very
>> slow floppies. The tape drive took care of locating logical blocks on
>> the tape, essentially providing a block type device to the computer.
> Very different.
> The TU58 behaves like a disk, not a tape.
> Anyway, ANSI is a "file system" for tapes. A "normal" file system will
> be very hard, since that would require the ability to rewrite existing
> blocks in the middle of the tape, which is a scary thing to try.
>     Johnny
that got me thinking about these Log-structured file system[1]

but all of them are too modern, I have not seen one designed for a 8-bit
CPU like the 6502 and they flash memory based :(


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