All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 5 posts ] 
Author Message
 Post subject: Hitachi 5475A9 Missing Rom
PostPosted: January 20th, 2019, 14:04 
Offline

Joined: February 28th, 2011, 21:04
Posts: 198
Location: United Kingdom
Hello, not sure if this is possible but worth an ask. Hitachi 5475A9 drive came into us for recovery. Noticed that the ROM chip had been replaced with a MOSFET.... after some back and forth with customer it turns out that their mac had been into someone else previously and they had rejected the quote for repair so it appears that company (round the corner from us and dodgy as the day is long) decided to sabotage his drive.

I did manage to find a board with rom from an identical drive, numbers all matched up and popped that on and it does spin but ticks and eventually goes ready. Knew it was a long shot but didnt have many other options.

Anyone know or who can recreate working rom or modify this one?

I realise that this could also have faulty heads but I dont want to open it up currently as im not sure where this job will end up going in terms of the customer taking action against this other company.


Top
 Profile  
 
 Post subject: Re: Hitachi 5475A9 Missing Rom
PostPosted: January 20th, 2019, 16:47 
Offline
User avatar

Joined: December 19th, 2006, 8:49
Posts: 10828
Location: Portugal
This should be ARM based drive.

ROM chip do have NVRam code as well so if chip is gone your bigest problem would be non-native NVRam (way more problematic than non-native ROM).

Lacking any other viable option and/or knowledge on how to do this you can contact member @drHDD as he does have some experience re-creating lost NVRam on this sort of drives.

memberlist.php?mode=viewprofile&u=31114

Good luck.

_________________
1Q9xrDTzTddUXeJAFRn37aqh1Yr6buDCdw - (Bitcoin Donations)
paypal.me/Spildit - (PayPal Donations)
The HDD Oracle - Platform for OPEN research on Data Recovery.


Top
 Profile  
 
 Post subject: Re: Hitachi 5475A9 Missing Rom
PostPosted: January 20th, 2019, 17:04 
Offline

Joined: February 28th, 2011, 21:04
Posts: 198
Location: United Kingdom
Hello. Yup, ARM, NVRAM stored on the same chip.

Ill send him a message

Thanks


Top
 Profile  
 
 Post subject: Re: Hitachi 5475A9 Missing Rom
PostPosted: January 20th, 2019, 17:12 
Offline
User avatar

Joined: December 19th, 2006, 8:49
Posts: 10828
Location: Portugal
Yeah. Most likely he will be able to help you out.

Good luck.

_________________
1Q9xrDTzTddUXeJAFRn37aqh1Yr6buDCdw - (Bitcoin Donations)
paypal.me/Spildit - (PayPal Donations)
The HDD Oracle - Platform for OPEN research on Data Recovery.


Top
 Profile  
 
 Post subject: Re: Hitachi 5475A9 Missing Rom
PostPosted: February 15th, 2019, 20:03 
Offline

Joined: October 3rd, 2005, 0:40
Posts: 3190
Location: Hungary
Hello,

should you still need help with this, i can do it too.

pepe

_________________
Adatmentés - Data recovery
No bitcoin donations :)


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 5 posts ] 

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: DeVlL, Google Adsense [Bot], Tawfeek and 79 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group