On Fri, 27 Mar 2009 08:07:29 -0500, Mohammad Khan wrote: >Please forgive my ignorance but how does robbing Hs to pay Cs increase the >total addressable storage ? Unless off course those Hs were for show only. >Mohammad
As Bill pointed out, 3390 and 3380 have only 15 tracks per cylinder, so the head address fits in one nibble. IIRC, the 3350 had 30 tracks per cylinder. The 2305 model 2 had 768 tracks and non-movable heads, so it would have needed more bits for the head address. -- Tom Marchant ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
