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Data recovery and disk repair questions and discussions related to old-fashioned SATA, SAS, SCSI, IDE, MFM hard drives - any type of storage device that has moving parts
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Cutting off a bad head to use the others

April 21st, 2010, 18:52

Let's say I have a hard drive with a bad head, which is interfering with other heads. Let's say I don't care about the data on the platter that's read with that bad head. Could I just cut off that bad head, and use the rest to get my data? As in, would it work fine if it's missing a head, or would that interfere with normal operation?

Thanks for any help.

Re: Cutting off a bad head to use the others

April 21st, 2010, 22:37

You can do it but it requires special tools like pc3k.

Re: Cutting off a bad head to use the others

April 22nd, 2010, 0:42

You can not take snips and cut off this head it has to be disabled in a utility like Ramzeez said with PC3K or other tools that can work in the SA and do this one for you

Re: Cutting off a bad head to use the others

April 22nd, 2010, 2:37

Rameez is correct.

Re: Cutting off a bad head to use the others

April 22nd, 2010, 2:50

Great, thanks.

Re: Cutting off a bad head to use the others

April 22nd, 2010, 12:41

Not only that, but data is usually stored in blocks/zones that encompass all surfaces. So unless you want a lot of holes in the data you will need to copy the data from all heads. You may be lucky if you are only after a few files, but Murphy's law says different :)

Re: Cutting off a bad head to use the others

April 23rd, 2010, 1:12

I have to agree w/ the rest of the people here, you can only "disable" a head via special data recovery hardware/software.

But let's pretend that you could theoretically cut off a bad head w/ some snips.

You would need to do this in a cleanbox/cleanroom to prevent contaminants entering your hard drive.
You would need to carefully remove the entire head assembly.
You would snip the bad head off
You would need to reinstall it all and hope it worked.
You would hope it wasn't a Western Digital w/ the $%@#*@ alignment screw. God I hate those.

Re: Cutting off a bad head to use the others

April 23rd, 2010, 9:25

Easy question to answer. Install a HSA that has one head less than it should. Does the drive still work?

Re: Cutting off a bad head to use the others

April 23rd, 2010, 10:11

drc wrote:Easy question to answer. Install a HSA that has one head less than it should. Does the drive still work?


in general, usually no.

Re: Cutting off a bad head to use the others

April 23rd, 2010, 10:12

Maybe modification of head configuration and head mapping in certain families will help, but again specialist tools will be required

Re: Cutting off a bad head to use the others

April 23rd, 2010, 12:27

Remove ONE head on 2-head VCR or ONE on 4 head VCR and see if you get half image or 1/4 of image on screen :D

Re: Cutting off a bad head to use the others

April 23rd, 2010, 15:03

a) What Scratchy said is critical: data is stored on all disk surfaces and there's no way for you to know that some of your data doesn't reside under the bad head.
b) You wouldn't have to cut the bad head off physically if you had the requisite software tools to disable the head in ROM. However, a bad head will frequently not allow the drive to start up properly at all. So whether you cut it off or not you're still not going to be able to access the data.

Re: Cutting off a bad head to use the others

April 23rd, 2010, 16:38

BlackST wrote:Remove ONE head on 2-head VCR or ONE on 4 head VCR and see if you get half image or 1/4 of image on screen :D


BWAHAHAHAHAHA! :lol:

Why stop there ST? Just take the head from the VCR and use it in place of the bad one!!

Re: Cutting off a bad head to use the others

April 23rd, 2010, 18:17

N.C. wrote:
drc wrote:Easy question to answer. Install a HSA that has one head less than it should. Does the drive still work?


in general, usually no.
Exactly
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