Maybe some oldtimers will be able to identify those relics. I am pretty sure the first one is from a drive that came with IBM 4361 we scrapped some 30 years ago and the other one from a VAX-11/750, but I don't know what models they are.
Update: the one on the left has been identified as IBM 3380 and the one on the right as Fujitsu M2294N https://ia803200.us.archive.org/13/items/bitsavers_fujitsubrorochure_2210946/Fujitsu_M2294_Brochure_text.pdf
Thanks to everyone who helped!
#computer #history
@blotosmetek If you still have Twatter account David of Usagi Electric could shed some light https://twitter.com/usagielectric
@blotosmetek ibm drives 3380 and 3390 had 8 plates, even today emulated devices has 15 tracks per cylinder (16 was spare). The older models had less plates, but I don’t remember any with 9 plates. See: https://ibmmainframes.com/references/disk.html
@blotosmetek Do you have any part number?
@nutilius Haven't found any numbers (except the hand-written 47050 that can be seen on the first assembly's lower right).
@nutilius @blotosmetek 3380 had 9 platters, and the weird mounting bracket seems to fit the form factor. Also fits the time period for an IBM 4361
@altomare @blotosmetek ok I assumed that software geometry (tracks per cylinder) is equivalent to hardware, my mistake, thanks!
@blotosmetek Second hard drive is very likely made by Fujitsu, it matches that picture of a Fujitsu M2294k from online