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Re: Platter Swap Without Alignment Issues
Posted: Wed Nov 27, 2019 2:40 pm
by lcoughey
Just added a Seagate V9 to the list. Had to remove the platters for a 3 slider search and rescue.
Re: Platter Swap Without Alignment Issues
Posted: Tue Dec 10, 2019 8:31 am
by 300ddr
In all cases the most that was done to maintain alignment was a fine point sharpie mark on the sides.
Toshiba MK6021GAS - 2 platters/4 heads - 99.9999% of sectors recovered
Seagate ST2000LM007 - 2 platters/4 heads - 99.9999% of sectors recovered
Seagate ST3500630AS - 3 platters/6 heads - 48.9099% of sectors recovered
Seagate ST31500341AS - 4 platters/8 heads - 95.14% of files recovered
Hitachi HDT725032VLAT80 - 2 platters/4 heads - 99% of files recovered
Seagate ST3320820AS - 2 platters/4 heads - 49.1397 of sectors recovered
Hitachi HCS5C1010CLA382 - 2 platters/4 heads - 58.359% of sectors recovered
Hitachi HDT725050VLAT80 - 3 platters/6 heads - 34.75% of sectors recovered
Re: Platter Swap Without Alignment Issues
Posted: Tue Dec 10, 2019 2:19 pm
by ddrecovery
You've been busy Brian
Re: Platter Swap Without Alignment Issues
Posted: Tue Dec 10, 2019 2:29 pm
by lcoughey
Thanks Brian. I've integrated your results into the main list.
Re: Platter Swap Without Alignment Issues
Posted: Wed Dec 11, 2019 3:47 pm
by RolandJS
Folks, I'd like to learn a little more to appreciate what you all do! In layperson terms, how do heads get re-aligned?
Re: Platter Swap Without Alignment Issues
Posted: Wed Dec 11, 2019 4:36 pm
by Blizzard
RolandJS wrote: ↑Wed Dec 11, 2019 3:47 pm
Folks, I'd like to learn a little more to appreciate what you all do! In layperson terms, how do heads get re-aligned?
Wikipedia has a basic description here:
Embedded Servo
Re: Platter Swap Without Alignment Issues
Posted: Mon Mar 16, 2020 5:23 pm
by Jared
So I've confirmed that you can rotate a platter 180 degrees on Dragonfly2 family with no problems afterward.
Re: Platter Swap Without Alignment Issues
Posted: Mon Mar 16, 2020 5:58 pm
by ddrecovery
Jared wrote: ↑Mon Mar 16, 2020 5:23 pm
So I've confirmed that you can rotate a platter 180 degrees on Dragonfly2 family with no problems afterward.
Did it affect the read speed?
Re: Platter Swap Without Alignment Issues
Posted: Tue May 05, 2020 3:44 am
by fzabkar
Are there any single platter models where swapping the platter into a donor drive does not work? I can envisage cases where such a procedure might introduce runout which cannot be accommodated by the track servo. Is that a real concern?
Do DR people ever transfer the single platter into a donor in preference to a head swap?
Re: Platter Swap Without Alignment Issues
Posted: Tue May 05, 2020 11:11 am
by lcoughey
I've never seen an issue with a single platter swap. As for swapping a single platter instead of the heads seems like a good idea on the surface, but considering you need to remove the heads in most models in order to remove the platter, it is not practical...except for the single head Maxtor N40P, where the platter swap is actually easier.