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Help for recovering USB drive with IS903 controller
http://forum.hddguru.com/viewtopic.php?f=10&t=46180		 Page 1 of 1
Author:  KdMK1973 [ July 20th, 2026, 16:47 ]
Post subject:  Help for recovering USB drive with IS903 controller
Hi Guys, I am trying to recover a 128GB memory USB-drive with a IS903 controller. The controller does not seem to work properly. the memory chip is labled "43010Y018946 128G" or "4301DY013346 128G" or something similar, but it appears to be relabeled.

Can anybody help in recoverring the data from the memory chip?

Thanks and best regards

kdMK1973

ChipGenius does say about the memory chip:
Description: [K:]USB-Massenspeichergerät(NAND Flash)
Device Type: Mass Storage Device
Protocal Version: USB 3.00
Current Speed: High Speed
Max Current: 304mA
USB Device ID: VID = 1F75 PID = 0903
Serial Number: 16110956000040
Device Name: USB DISK
Device Revision: 0001
Product Model: NAND Flash
Product Revision: 1.00
Controller Vendor: Innostor
Controller Part-Number: IS903-A4 - ??ROM??
Flash ID code: 453E87937E57 - SanDisk SDTNQFDMA-064G - 2CE/Single Channel [MLC-16K] -> Total Capacity = 128GB
Tools on web:
Possible Flash Part-Number
----------------------------
[1CE]SDTNQFDMA-064G x 2 pcs/Channel x 1 Channel
[1CE]SDTNQFDMA-064G x 2 pcs/Channel x 1 Channel
Flash ID mapping table
----------------------------
[Channel 0] [Channel 1]
453E87937E57 --------
453E87937E57 --------
-------- --------
-------- --------
Author:  arvika [ July 21st, 2026, 2:54 ]
Post subject:  Re: Help for recovering USB drive with IS903 controller
Yes. Chip-off method should give good result for this controller.
Author:  KdMK1973 [ July 21st, 2026, 15:36 ]
Post subject:  Re: Help for recovering USB drive with IS903 controller
Thanks for you advice. I assume that this means physically detaching the memory chip and try to read out by means of an other controller? Can you recommend somebody who has the knowhow and tool for this? Thanks a lot and best regards
Martin
Author:  arvika [ July 22nd, 2026, 2:52 ]
Post subject:  Re: Help for recovering USB drive with IS903 controller
Yes. desolder the chips, read and recover data bypassing the controller.
Tools ljke FE, VNR, PC3K, NFT. Me and many others on this forum can do this.
Author:  Arch Stanton [ July 22nd, 2026, 5:36 ]
Post subject:  Re: Help for recovering USB drive with IS903 controller
KdMK1973 wrote:
The controller does not seem to work properly.

Controller Part-Number: IS903-A4 - ??ROM??


Seems to be in ROM mode. Prolly not the controller itself then but NAND or inability to talk to NAND.

The person who answered you is one of the best and located in Poland (easy to ship the flash drive there: https://odzyskiwanie-danych.com.pl/
Author:  KdMK1973 [ July 22nd, 2026, 15:44 ]
Post subject:  Re: Help for recovering USB drive with IS903 controller
arvika wrote:
Yes. desolder the chips, read and recover data bypassing the controller.
Tools ljke FE, VNR, PC3K, NFT. Me and many others on this forum can do this.


Hi Arvika, thanks for your answer. Do you offer such services? An other user wrote so. Can you give me a idea about the costs?
Thanks and best regards
Martin
Author:  arvika [ July 23rd, 2026, 0:18 ]
Post subject:  Re: Help for recovering USB drive with IS903 controller
Yes. Write PM.
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