17 Mar
2010
17 Mar
'10
2:54 p.m.
Nice IBM sales video and stills:
http://gizmodo.com/5494858/ibm-305-ramac-the-grandaddy-of-modern-hard-drives
2006 (50th anniversary) article:
http://www.newsweek.com/id/46300
IBM's info:
http://www-03.ibm.com/ibm/history/exhibits/storage/storage_350.html
5 MB (approx.) for only $3,200/month ($24,978 in 2009 dollars)!
"Disks rotated at 1,200 rpm, tracks (20 to the inch) were recorded at up to 100 bits
per inch, and typical head-to-disk spacing was 800 microinches. The execution of a
"seek" instruction positioned a read-write head to the track that contained the
desired sector and selected the sector for a later read or write operation. Seek time
averaged about 600 milliseconds."