On 01/19/2012 02:30 PM, Lew Wolfgang wrote:
On 01/19/2012 11:07 AM, Mark Hounschell wrote:
You probably meant 200 ips "Inches per second" which is a fast drive. As were those big IBM's. Most normal 9-track tape drives ranged from 45ips in the mid to late 70's to 125ips in the early to late 80's.
I'm fairly sure it was frames per inch. The more modern "PE" 9-tracks were up in the 6250-FPI range, if memory serves.
6250 was the recording density called GCR. That was in bytes per inch. PE was 1600 bytes per inch. NRZI was 800 bytes per inch The tape drive I mentioned earlier is capable of all 3 of those recording densities and is a 125ips drive. There was even a 2400 byte per inch but is was unnamed. Mark -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org