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LarrySabo
 Post subject: WD Head Alignment by Cover Position - last family/model?
PostPosted: September 9th, 2014, 8:43 
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Joined: December 8th, 2010, 11:37
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Location: Ottawa, Canada
Can anyone tell me at what point (family/model/date) did Western Digital change the design of their drives so that head alignment is no longer dependent upon the cover position?

I have a WD2500AAKS-22B3A0 drive from 31-Aug-2008 that needs a head swap and I'm reluctant to start if it is one of the models where head alignment is lost as soon as the cover is removed.

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jono-ats
 Post subject: Re: WD Head Alignment by Cover Position - last family/model?
PostPosted: September 9th, 2014, 9:11 
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My guess is Zeus.

The xxxAAKS had wider SA track widths and is not top-cover position dependent.

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northwind
 Post subject: Re: WD Head Alignment by Cover Position - last family/model?
PostPosted: September 9th, 2014, 9:31 
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What he said ^^^^

These don't have the alignment issue.

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LarrySabo
 Post subject: Re: WD Head Alignment by Cover Position - last family/model?
PostPosted: September 9th, 2014, 10:45 
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Thanks kindly for your helpfulness. Rather than ask this question each time, is there a reference that would indicate whether the drive is dependent upon cover position? I'll try to find out which families pre-dated/followed Zeus in the meantime.

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Alexii
 Post subject: Re: WD Head Alignment by Cover Position - last family/model?
PostPosted: September 9th, 2014, 11:11 
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Joined: October 28th, 2009, 14:35
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Ah the memories =) Zeus the 4 platter monstrosity. Never did play nice for head swaps with a single donor. Always required a second one to pick up a few heads missing from primary try =) Was it the 1st 500 gb WD on the market ?
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northwind
 Post subject: Re: WD Head Alignment by Cover Position - last family/model?
PostPosted: September 10th, 2014, 4:54 
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Alexii wrote:
Never did play nice for head swaps with a single donor. Always required a second one to pick up a few heads missing from primary try =)


Indeed. Those don't like it at all when they have their heads changed.
LarrySabo wrote:
Rather than ask this question each time, is there a reference that would indicate whether the drive is dependent upon cover position?

All pre-ROYL drives are cover position sensitive.

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pcimage
 Post subject: Re: WD Head Alignment by Cover Position - last family/model?
PostPosted: September 10th, 2014, 4:59 
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Alexii wrote:
Ah the memories =) Zeus the 4 platter monstrosity. Never did play nice for head swaps with a single donor. Always required a second one to pick up a few heads missing from primary try =) Was it the 1st 500 gb WD on the market ?


Yep, nasty things!

I've done a platter swap on one of these too, that was great fun!.... NOT :evil:

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LarrySabo
 Post subject: Re: WD Head Alignment by Cover Position - last family/model?
PostPosted: September 10th, 2014, 10:53 
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northwind wrote:
Alexii wrote:
LarrySabo wrote:
Rather than ask this question each time, is there a reference that would indicate whether the drive is dependent upon cover position?

All pre-ROYL drives are cover position sensitive.

Ah, thanks, Northwind! That's what I was looking for.

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northwind
 Post subject: Re: WD Head Alignment by Cover Position - last family/model?
PostPosted: September 11th, 2014, 4:01 
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You're most welcome.

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