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Old 10-11-2019, 06:27 AM   #46
Soadyheid
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Registered: Aug 2010
Location: Near Edinburgh, Scotland
Distribution: Cinnamon Mint 17.3 (Netbook) and 18.3 (Desktop)
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@FredGSanford
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I remember working in the early 1990s for a large bank and they were still using the old magnetic disk pack. I used to hate having to unload and reload those disk packs.
Hmmm... I used to be very wary of the guys who loaded and unloaded our VAX11/780's RP06 drives, Especially the one who said, "The system wouldn't boot after loading the "cake stand", (Multi platter disk pack), on drive 0. I've tried it in drives 1 and 2 as well and nothing."

Reply: "Er... did you try booting the backup by any chance?"

"Yes, still nothing."

"AAAaaarrrggghhh!

System down and three drives with head crashes, 20 heads per drive PLUS, the backup is toast! Even the local DEC Service Centre didn't hold sixty heads. (That's thirty pairs, each pair being an "UP" and a "DOWN" facing head.

Luckily it was DEC who had to sort it out that time.

I was brought up with smaller drives; RK05 cartridge jobs, only two heads which could actually be rescued (If you were lucky!) using lint free cloth and Trichlorethelene and a lot of elbow grease. (We didn't have holes in the ozone layer way back then.)
Other drives also needed each head to be replaced separately plus aligned with a special CE pack though RL01s and RL02's had embedded servo tracks so you could just use a standard pack.

I started out hand coding paper tape on a teletype using ASCII code which was used to control a photoplotter. Mistakes meant a tape splice and a little device which allowed you to re-punch the faulty byte(s) plus associated sprocket holes.

Youngsters today are spoiled!

Play Bonny!

 
  


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