On Wed, Feb 23, 2011 at 02:09:28PM -0800, Rich Alderson wrote:
144,000 * 18 =
2,592,000 bits.
578 * 128 * 36 = 2,663,424 data bits, so you're close.
1474 * 129 * 12 = 2,281,752 data bits, so your figure is in the middle.
Also, I've been told that you could "compact" the tape by breaking the
reel with your finger while formatting (writing timing and mark tracks).
I'm guessing that electromechanical differences between drives would
influence the actual speed of the reel and therefore the usable size of
the tape.
Regards,
Pontus