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shahij
 Post subject: Drive PCB Without ROM submitted
PostPosted: December 21st, 2009, 15:39 
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Joined: March 11th, 2008, 4:35
Posts: 1052
Location: Bangladesh
any idea?
7200.10 drive from client, without the ROM in PCB...

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harddrivespecialist
 Post subject: Re: Drive PCB Without ROM submitted
PostPosted: December 21st, 2009, 17:00 
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Joined: January 15th, 2008, 11:06
Posts: 1419
Location: Providence, RI. Boston, MA USA
I won't be surprised if there some other issues with a drive besides a ROM chip.

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shahij
 Post subject: Re: Drive PCB Without ROM submitted
PostPosted: December 22nd, 2009, 3:55 
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Joined: March 11th, 2008, 4:35
Posts: 1052
Location: Bangladesh
the ROM CHIP was removed already from the PCB while client submitted the drive.

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hddguy
 Post subject: Re: Drive PCB Without ROM submitted
PostPosted: December 22nd, 2009, 4:12 
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Joined: November 9th, 2006, 15:15
Posts: 2984
The ROM on 7200.10 does not contain adaptives unique to the drive, so matching compatible ROM will allow for compatibility. If you can not get original ROM, I would start by trying to find donor PCB with matching code eg. 100406541. Alternatively if you have large collection of ROM resources for 7200.10 you can try several to try find a match.

You will need to verify compatibility via Terminal output as I have a feeling there may be other problems also :(
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pepe
 Post subject: Re: Drive PCB Without ROM submitted
PostPosted: December 22nd, 2009, 18:16 
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Joined: October 3rd, 2005, 0:40
Posts: 4753
Location: Hungary
Am I wrong thinking that SA location varies on .10 and it is hardcoded in the ROM?

pepe

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hddguy
 Post subject: Re: Drive PCB Without ROM submitted
PostPosted: December 23rd, 2009, 4:44 
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Joined: November 9th, 2006, 15:15
Posts: 2984
pepe wrote:
Am I wrong thinking that SA location varies on .10 and it is hardcoded in the ROM?

pepe


Maybe you are right, I am not totally sure. I have had some success in PCB replacement without ROM soldering, but also some cases where ROM transfer is needed. Maybe with .10 it is possible to simply get lucky :)
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HDD Spaz
 Post subject: Re: Drive PCB Without ROM submitted
PostPosted: December 23rd, 2009, 4:49 
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Joined: October 13th, 2008, 7:29
Posts: 1493
you have to be very lucky if SA location is the same but it is possible, I've had some success with Travelstars without changing ROM. (1 out of 300!)
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hddguy
 Post subject: Re: Drive PCB Without ROM submitted
PostPosted: December 23rd, 2009, 4:53 
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Joined: November 9th, 2006, 15:15
Posts: 2984
HDD Spaz wrote:
you have to be very lucky if SA location is the same but it is possible, I've had some success with Travelstars without changing ROM. (1 out of 300!)


Were your hands sore after changing 300 PCBs :lol:
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HDD Spaz
 Post subject: Re: Drive PCB Without ROM submitted
PostPosted: December 23rd, 2009, 4:54 
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Joined: October 13th, 2008, 7:29
Posts: 1493
hddguy wrote:
HDD Spaz wrote:
you have to be very lucky if SA location is the same but it is possible, I've had some success with Travelstars without changing ROM. (1 out of 300!)


Were your hands sore after changing 300 PCBs :lol:



Ok, I should have mentioned over the course of a few years. lol.
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viktdev
 Post subject: Re: Drive PCB Without ROM submitted
PostPosted: December 23rd, 2009, 6:54 
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Joined: February 9th, 2009, 6:19
Posts: 40
Location: Earth
I've made interesting experiences with seagate drives in the past. I didn't understand why SA location changed after a selfscan. In fact tracks change but gray code always seems to be the same. Reading the rom after the selfscan showed no differences... In drives with the same firmware revision, gray codes seems to be constant but, tracks are different and pcb swap is possible without swapping rom. But these drives were not .10
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shahij
 Post subject: Re: Drive PCB Without ROM submitted
PostPosted: December 23rd, 2009, 7:43 
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Joined: March 11th, 2008, 4:35
Posts: 1052
Location: Bangladesh
thx all for cooperation, i will let you know updates

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