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 Post subject: Single disk drive - Possible to flip disk when 1 head fails?
PostPosted: August 14th, 2019, 11:24 
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Joined: June 11th, 2017, 1:16
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Location: Australia
For a drive with a single double sided disk with 2 heads, if one head fails but drive will still initialise ok, does anyone know if theoretically you'd be able to image half the drive with the working head, then flip the disk over and image the other side with that working head?


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 Post subject: Re: Single disk drive - Possible to flip disk when 1 head fa
PostPosted: August 14th, 2019, 11:30 
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Joined: June 11th, 2013, 17:01
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Location: Phoenix, AZ USA
If you think about it turning the disk over will make it spin backwards. Get a piece of card and mark an arrow on it pointing the same way on both sides. Then turn the card over and you will see it would spin backwards.

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 Post subject: Re: Single disk drive - Possible to flip disk when 1 head fa
PostPosted: August 14th, 2019, 13:33 
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Joined: August 15th, 2006, 3:01
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Location: CDRLabs @ Chandigarh [ India ]
jordash wrote:
For a drive with a single double sided disk with 2 heads, if one head fails but drive will still initialise ok, does anyone know if theoretically you'd be able to image half the drive with the working head, then flip the disk over and image the other side with that working head?


Well,
That Would Be a Nice Experiment ,But it should not work cos the servo info will not match the sector that its trying to fetch ,Generally when a head fails it should be properly inspected so that we come to know why it failed ,If its crashed on platter recovery would be very hard ,Which Drive is it BTW

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 Post subject: Re: Single disk drive - Possible to flip disk when 1 head fa
PostPosted: August 14th, 2019, 14:05 
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Joined: September 16th, 2015, 9:06
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jordash wrote:
then flip the disk over and image the other side with that working head?

You can hear Satan calling this way, like it was with vinyl's backmasking :lol:

But no, it will not work, sorry.

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 Post subject: Re: Single disk drive - Possible to flip disk when 1 head fa
PostPosted: August 14th, 2019, 15:48 
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Joined: February 2nd, 2019, 1:21
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100% not working.


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 Post subject: Re: Single disk drive - Possible to flip disk when 1 head fa
PostPosted: August 15th, 2019, 9:19 
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Joined: June 11th, 2017, 1:16
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Amarbir[CDR-Labs] wrote:
Which Drive is it BTW


1tb 3.5" Hiatchi HDS721010DLE630. Damn, head replacement it is then.


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 Post subject: Re: Single disk drive - Possible to flip disk when 1 head fa
PostPosted: August 26th, 2019, 7:01 
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Joined: August 26th, 2019, 6:55
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Location: United states
never thought of that.


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 Post subject: Re: Single disk drive - Possible to flip disk when 1 head fa
PostPosted: August 26th, 2019, 7:44 
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Joined: December 4th, 2012, 1:35
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Location: Adelaide, Australia
could flip it, then image in reverse ;-)


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 Post subject: Re: Single disk drive - Possible to flip disk when 1 head fa
PostPosted: August 26th, 2019, 7:49 
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Joined: December 8th, 2013, 4:48
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Location: Pakistan
jordash wrote:
For a drive with a single double sided disk with 2 heads, if one head fails but drive will still initialise ok, does anyone know if theoretically you'd be able to image half the drive with the working head, then flip the disk over and image the other side with that working head?


with this description, it will not work.

The best way to get useful advice is to share the complete drive information, problem etc.
maybe someone can help you in right direction.

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