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 Post subject: Toshiba MQ01UBD100 reads on head0 only via PBA
PostPosted: October 15th, 2017, 13:20 
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Joined: December 5th, 2011, 5:38
Posts: 1626
Location: Italy
Hello,
i've this Toshiba MQ01UBD100 usb drive that i need to clone.
I converted usb pcb G3448A to sata by using sata donor G003235B
G3448A ----------> G003235B

I already cloned surface 1 - 2 - 3 without any problem in sata mode, but i can't clone any single sector on surface 0 (SATA, UDMA, PIO mode don't work).
I thought it was bad head 0 (or at least very weak head), but if i turn off technology mode on toshiba utility, i'm able to read sectors on surface 0 only via PBA.
Attachment:
Techno off.jpg
Techno off.jpg [ 177.69 KiB | Viewed 6519 times ]

Attachment:
Reading via PBA.jpg
Reading via PBA.jpg [ 31.6 KiB | Viewed 6519 times ]


Reading speed in PBA mode is pretty slow (about 2,7 MB/s) but many consecutives sectors are not readable even in PBA. When head 0 hits first unreadable sector of those bad zones, hard drive goes busy for about 10 seconds before that is able to continue (i had to set 80,000 LBAs jump on 'skipping sectors after reading error' or it would take a life to continue reading).

In fact, i don't think head 0 is dead (at least is just weak), i believe that this issue is related more to bad surface + damaged FW.
I have cleared glist and smart but it didn't help at all.

How can i deal with such problem?
I think it might be possible to clone in normal mode (faster) and clone those unreadable zones too, if i find what's wrong with firmware, but i don't know much about toshiba drives.
Does someone of you know what to do in this case?

I posted firmware backup, maybe someone can find what's wrong (if there is somethibg wrong).
Please, help me thanks.
Attachment:
TOSHIBA MQ01UBD100-AX101U-Y5AFTJZVT.rar [127.77 KiB]
Downloaded 398 times

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 Post subject: Re: Toshiba MQ01UBD100 reads on head0 only via PBA
PostPosted: October 15th, 2017, 13:48 
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Joined: November 29th, 2006, 10:08
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Location: UK
My money is on the head being bad/weak.

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 Post subject: Re: Toshiba MQ01UBD100 reads on head0 only via PBA
PostPosted: October 15th, 2017, 13:50 
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Joined: December 5th, 2011, 5:38
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Location: Italy
If head is bad, why i can read sectors in PBA mode?
Why not possible to read in LBA mode?

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 Post subject: Re: Toshiba MQ01UBD100 reads on head0 only via PBA
PostPosted: October 15th, 2017, 15:02 
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Joined: November 29th, 2006, 10:08
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Location: UK
Ok, weak rather than bad then. It sounds like it’s struggling to read.

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 Post subject: Re: Toshiba MQ01UBD100 reads on head0 only via PBA
PostPosted: October 15th, 2017, 17:31 
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Joined: September 8th, 2009, 18:21
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FWIW, the G-list has 3 sections. The number of reallocated sectors before and after clearing is 0. The second section has 0x660 defects (pending sectors/tracks?) before clearing and 0xE afterwards. The third section remains unchanged after clearing.

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 Post subject: Re: Toshiba MQ01UBD100 reads on head0 only via PBA
PostPosted: October 17th, 2017, 3:01 
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Joined: September 30th, 2005, 7:33
Posts: 849
michael chiklis wrote:
If head is bad, why i can read sectors in PBA mode?
Why not possible to read in LBA mode?

If it was a WDC drive I would say:
In PBA mode it uses Coarse Microjog settings and in LBA mode Fine Microjog settings. This makes the diffrence.

For Toshiba drives I'm not so sure...


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 Post subject: Re: Toshiba MQ01UBD100 reads on head0 only via PBA
PostPosted: October 17th, 2017, 5:03 
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Joined: July 19th, 2017, 2:05
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Ok, weak rather than bad then. It sounds like it’s struggling to read.


PCimage is Right Drive suffer weak Heads & G-list problem.

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 Post subject: Re: Toshiba MQ01UBD100 reads on head0 only via PBA
PostPosted: October 17th, 2017, 6:29 
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Joined: December 5th, 2011, 5:38
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Thank you all, i continue to clone surface 0 slowly in PBA mode :wink:

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