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Pi0tR
 Post subject: SanDisk Ultra II - 480 GB - 88SS1074-BSW2 - No Life Singal
PostPosted: September 20th, 2025, 6:23 
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Hi, I need to recover data from a SanDisk Ultra II with a Marvell 88SS1074-BSW2 controller.
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Unfortunately, the drive shows no signs of life. I've tested all the capacitors and they seem fine.
I think the next step should be measuring the MOSFET.
I found two components in a SOT23 package (marked in red).
Attachment:
mosfet.jpg
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My question is: is this a good approach, or should I try something else?
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Lukas
 Post subject: Re: SanDisk Ultra II - 480 GB - 88SS1074-BSW2 - No Life Sing
PostPosted: September 28th, 2025, 4:30 
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Have you connected this drive to MHDD or another system that can display work log controls?

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Pi0tR
 Post subject: Re: SanDisk Ultra II - 480 GB - 88SS1074-BSW2 - No Life Sing
PostPosted: September 28th, 2025, 14:31 
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Yes, I tried, but the disk is not detected by the BIOS or any software.
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fzabkar
 Post subject: Re: SanDisk Ultra II - 480 GB - 88SS1074-BSW2 - No Life Sing
PostPosted: September 28th, 2025, 14:55 
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Start by measuring the voltages at each of the 4 inductors surrounding the Active Semi PMIC.

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fzabkar
 Post subject: Re: SanDisk Ultra II - 480 GB - 88SS1074-BSW2 - No Life Sing
PostPosted: September 28th, 2025, 15:17 
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Measure these test points.


Attachments:
PMIC.jpg
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SATA_5V.jpg
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Pi0tR
 Post subject: Re: SanDisk Ultra II - 480 GB - 88SS1074-BSW2 - No Life Sing
PostPosted: September 30th, 2025, 10:44 
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ok
D2 5.1v
FB1 5.1v
C43 1.0v but on the right side of cap.

v1 1.3v
V2 1.0v
v3 2.7v
V4 1.8v
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fzabkar
 Post subject: Re: SanDisk Ultra II - 480 GB - 88SS1074-BSW2 - No Life Sing
PostPosted: September 30th, 2025, 14:55 
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Those voltages are probably OK, in which case you may have a firmware problem.

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Lukas
 Post subject: Re: SanDisk Ultra II - 480 GB - 88SS1074-BSW2 - No Life Sing
PostPosted: September 30th, 2025, 15:06 
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Pi0tR wrote:
Yes, I tried, but the disk is not detected by the BIOS or any software.

I didn't ask if the drive was detected, just about the status of the work log. I agree with the opinion about corrupted firmware.

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Pi0tR
 Post subject: Re: SanDisk Ultra II - 480 GB - 88SS1074-BSW2 - No Life Sing
PostPosted: October 1st, 2025, 8:36 
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Okay, so gentlemen, what are the chances of fixing this without a PC3K? Unfortunately, MRT didn't reveal the carrier. The pins at the bottom of the carrier look like JTAG. The question is, can I achieve anything with them? Or is there another method?
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Lukas
 Post subject: Re: SanDisk Ultra II - 480 GB - 88SS1074-BSW2 - No Life Sing
PostPosted: October 1st, 2025, 8:42 
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The pins are for connecting the terminal:
https://blog.acelab.eu.com/pc-3000-ssd- ... l-cpu.html

The problem with these drives is usually memory degradation, which, even with the use of appropriate tools, does not allow for satisfactory data recovery.

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Pi0tR
 Post subject: Re: SanDisk Ultra II - 480 GB - 88SS1074-BSW2 - No Life Sing
PostPosted: October 1st, 2025, 9:08 
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Joined: September 13th, 2023, 5:53
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I'm starting my journey with data recovery, the medium is purely for learning purposes, so I'll give it a try anyway, I'll keep you posted on the progress or lack thereof.

many thansk Lukas
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