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This Janet Jackson BASSLINE breaks laptops

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tom66:

--- Quote from: wraper on January 09, 2023, 09:11:23 pm ---Actually its almost a miracle hard disks can work at all with vibrations present considering track width in nanometers.

--- End quote ---

Even more miraculous is devices like the original iPod with 20 ~ 160GB micro hard disks inside them.  These devices can play music while you are cycling and in my limited experience they never dropped out.  It's almost a shame such a device lost out to flash memory, of course flash is technologically better, but it's *boring*.

BrianHG:

--- Quote from: tom66 on January 10, 2023, 03:31:34 pm ---Even more miraculous is devices like the original iPod with 20 ~ 160GB micro hard disks inside them.  These devices can play music while you are cycling and in my limited experience they never dropped out.

--- End quote ---
No.  Apple's big thing about the IPOD is that their playback cache was stored in ram as .mp3 and that they had an hours worth of it which was loaded in around ~5 seconds.  If you stopped moving for a few seconds, the drive could power up, load the next hour of music, and go back to deep sleep saving the battery life.

tom66:

--- Quote from: BrianHG on January 11, 2023, 05:18:54 am ---No.  Apple's big thing about the IPOD is that their playback cache was stored in ram as .mp3 and that they had an hours worth of it which was loaded in around ~5 seconds.  If you stopped moving for a few seconds, the drive could power up, load the next hour of music, and go back to deep sleep saving the battery life.

--- End quote ---

Yes, I suppose that would help - but wasn't that more about power saving than anything?  You'd still need to spin the disk up if you like to skip songs a lot, and it didn't seem to have trouble when I did that. 

Haenk:

--- Quote from: Ed.Kloonk on January 09, 2023, 05:43:08 am ---One of my computer dealers used to say that the sudden power outage forces a head park, too many of those and it's goodnight drive since it's not good for the heads to do that too often. That's what I was told, don't know if it's bullshit or not. The accelerometer could be performing this task, but it swings the heads pretty hard into park, as I understand.

--- End quote ---

I'd say that is nonsense - if powered down, the platters still spin, so the heads are still up in the air (so to speak); the arm itself snaps back into parking position almost immediatly (*way* faster than the spindown duration) and the heads are then stabilzed by some plastic spacers and above a "crash zone" on the platters. So sudden power loss is usually no problem (other than maybe data loss due to unwritten data). The arm mechanics is really extremely solid and AFAIR there were even drives that were powered down permanently for energy savings (early WD Green?), I think those had powerup/down-cycles (which are mechanically equivalent to a power loss, minus the platter motor) in the hundreds of thousands or even millions.

MrMobodies:
I remembered seeing a few laptops in the past with a rubber patch under or near the hard disk cover with a label on it hinting to absord shocks.

I wonder if that would help bit with the high pitched noise.

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