I have a 3380 HDA I saved from my mainframe days...had a MAJOR headcrash....when I opened up the top to look, the head that crashed was vaporized!

Hi Bob, Thanks for the info ... these are 3380 "E" models. Smoked plastic cover over an AL casting. I assume the magnets & actuators must be in the ends of the drive housing. Haven't had a chance to look at them yet. I can imagine a head crash on those would have been something! Still can't get over the size of the drive motor! Craig Bob Brown wrote: > > 3380's were a product of the 80's. There were several different > flavors...the originals came out in the early > 80's. They were known as A0's or AA's. or AD's. They were 'single > density'...each hda had two addressable > actuators (one coming out each side)...each actuator addressed about 600MB > of storage. > > They later came out with AE's which were double density...then J's and K's > which were trible density. > > Did you happen to grab the magnets from the cabinets? VERY powerful > permanent magnets indeed! (very heavy too). > > I have a 3380 HDA I saved from my mainframe days...had a MAJOR > headcrash....when I opened up the top to look, the > head that crashed was vaporized! > > -Bob > > At 08:59 PM 3/18/2001 -0500, you wrote: > > Among my pickups over the weekend were a pair of these HUGE IBM > >3380 drives. Couldn't even begin to find room for the entire unit with > >its > >cabinet and controllers, but did scavange the drives and motors out of > >the cabinet. Biggest drive I've ever seen. Belt driven! from an external > >1.5 > >HP motor ..these things are Big! Cast alluminium housing w/14" discs,

Thanks. Sounds like 1.2G to 3.6G per drive. Wonder how we can tell which vintage we have? I took one to my office. Getting these babies up the steps was way much, even with help! RT -----Original Message----- From: owner-classiccmp(a)classiccmp.org [mailto:owner-classiccmp@classiccmp.org]On Behalf Of Bob Brown Sent: Monday, March 19, 2001 8:12 AM To: classiccmp(a)classiccmp.org Subject: Re: IBM 3380 disk drives / info? 3380's were a product of the 80's. There were several different flavors...the originals came out in the early 80's. They were known as A0's or AA's. or AD's. They were 'single density'...each hda had two addressable actuators (one coming out each side)...each actuator addressed about 600MB of storage. They later came out with AE's which were double density...then J's and K's which were trible density. Did you happen to grab the magnets from the cabinets? VERY powerful permanent magnets indeed! (very heavy too). I have a 3380 HDA I saved from my mainframe days...had a MAJOR headcrash....when I opened up the top to look, the head that crashed was vaporized! -Bob At 08:59 PM 3/18/2001 -0500, you wrote: > Among my pickups over the weekend were a pair of these HUGE IBM >3380 drives. Couldn't even begin to find room for the entire unit with >its >cabinet and controllers, but did scavange the drives and motors out of >the cabinet. Biggest drive I've ever seen. Belt driven! from an external >1.5 >HP motor ..these things are Big! Cast alluminium housing w/14" discs, >the whole assembly seems about 1/2 the size of a V-6 auto eng! > IBM site has several references to them, circa early 80's I gather >but they sure look older than that. What I'd like to find is IBM >publication #GC26-4491 [IBM 3380 Direct Access Storage Intro] and/or IBM >pub #GX26-1678 [Storage Reference Summary]. Neither seems to be in the >on-line library from IBM. > Any other info or dating is always welcome too. > Thanks, Craig