Também achei que fosse uma unidade a tambor, mas resolvi pesquisar um pouco mais... O que parece um tambor são os discos empilhados.
A máquina funcionava como uma jukebox, trocando os discos quando necessário. AKA wrote: > HDD - google rules > olha o custo.... 35.000 US$ por ano de aluguel > > > 1956: IBM 305 RAMAC Computer with Disk Drive > > *IBM introduced the 305 RAMAC > <http://eet.com/news/98/1016news/disk.html> computer on September > 13th, 1956, which was the first computer to include a disk drive named > the IBM 350 Disk File. Prior to this magnetic computer storage had > consisted of core memory, tape, and drums. The magnetic disk was seen > as a replacement for the magnetic drum for the same reason 78 RPM > Records <http://www.cedmagic.com/history/berliner-gramophone.html> > eventually replaced Edison > <http://www.cedmagic.com/history/edison-cylinder.html> cylinders- more > storage with less space. * > > *The 350 Disk File consisted of a stack of fifty 24" discs that can be > seen to the left of the operator in the above picture. The capacity of > the entire disk file was 5 million 7-bit characters, which works out > to about 4.4 MB in modern parlance. This is about the same capacity as > the first personal computer hard drives that appeared in the early > 1980's, but was an enormous capacity for 1956. IBM leased the 350 Disk > File for a $35,000 annual fee.* > > *Today the magnetic disc is the platform of choice for the temporary > storage of digital video, but it wasn't until the late 1960's that the > magnetic disc was used for any sort of video storage. At that time the > Instant Replay Deck > <http://www.cedmagic.com/history/instant-replay-hs-100-deck.html> was > introduced, which permitted the storage and playback of brief segments > of analog video.* > > fonte: http://www.cedmagic.com/history/ibm-305-ramac.html > > > > On 12/22/06, *Rubens* <[EMAIL PROTECTED] > <mailto:[EMAIL PROTECTED]>> wrote: > > ... > AKA| CAN YOU GUESS, WHAT IS THIS? > | Its a hard disk in 1956.... > | The Volume and Size of 5MB memory storage in 1956. > | In September 1956 IBM launched the 305 RAMAC, the first > | computer with a hard disk drive (HDD). The HDD weighed > | over a ton and stored 5MB of data. > > Nao me parece um HDD, e sim um tambor magnetico, > que foi o precursor dos discos magneticos. > > [ ] Rubens > > . > > >
