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T7 try to recover it http://forum.hddguru.com/viewtopic.php?f=10&t=44979	Page 1 of 1

Author:

tcccorp [ January 2nd, 2025, 5:32 ]

Post subject:

T7 try to recover it

hello,

I have a T7 and when I try to use it, it fails

so I decided to open it !

please find enclosed PCB picture . there are a line A ( 7 pins) , a line B ( 5 pins) on the right and 2 pins on the left.

I took value from GND to a pin :

A1 - GND
A2 - 2.3V
A3 - 3.28V
A4 - 0
A5 - 3.28V
A6 - 0
A7 - 0

A8 - 3.28V
A9 - 3.28V

B1 - 0
B2 - 3.28V
B3 - 2.3V
B4 - 1.8V

B line looks to be voltage part

i tried to short pin A6 and A7 during boot. After that, I used a jtagulator to find a JTAG or uart port with without success

maybe it is an issue with the controller

do you know if safe mode pins are on the A8/A9 ? if someone has pinout for this ssd, I'll be happy to test !

KR

Attachments:

Capture d'écran 2025-01-02 101425.png [ 348.36 KiB | Viewed 10006 times ]

Author:	Arch Stanton [ January 2nd, 2025, 12:07 ]
Post subject:	Re: T7 try to recover it
Quote: maybe it is an issue with the controller Most of the times it's not that. Quote: I have a T7 and when I try to use it, it fails Is utterly non descriptive and non informative.

Author:

sourcerer [ January 2nd, 2025, 12:08 ]

Post subject:

Re: T7 try to recover it

This looks strange, could it be shorted? You can safely remove it and make sure that it doesn't short anymore, there are enough capacitors nearby

Attachments:

SamsungPhoto.png [ 302.22 KiB | Viewed 9949 times ]

Author:

fzabkar [ January 2nd, 2025, 17:19 ]

Post subject:

Re: T7 try to recover it

Measure the voltages at V1 - V5.

Can you tell us the markings on "ICx"?

Also check for shorts at the ESD protection diodes:

https://www.hddoracle.com/viewtopic.php?f=100&t=1615&p=24636#p24636

TPS62085, Texas Instruments, adjustable 3A Step-Down Converter with DCS-Control and Hiccup Short Circuit Protection, 2x2 HotRod Package, marking PD5Q, 7-pin:
https://www.ti.com/lit/ds/symlink/tps62085.pdf

Attachments:

regs.jpg [ 303.95 KiB | Viewed 9900 times ]

TPS62085_pinout.gif [ 53.58 KiB | Viewed 9900 times ]

Author:	fzabkar [ January 2nd, 2025, 17:26 ]
Post subject:	Re: T7 try to recover it
sourcerer wrote: This looks strange, could it be shorted? You can safely remove it and make sure that it doesn't short anymore, there are enough capacitors nearby Its marking is "05b" and it is in parallel with the capacitor array. This is one possibility: PESD5V0S1BA-N, ESD Protection Diode, 350W, 5V, bidirectional, marking 05B, SOD323: https://xonstorage.blob.core.windows.net/pdf/bourne_pesd5v0s1ban_apr22_xonlink.pdf

Author:	fzabkar [ January 3rd, 2025, 0:51 ]
Post subject:	Re: T7 try to recover it
I think ICx is an e-fuse. Compare the Vin and Vout voltages. TPS259535DSG, Texas Instruments, 2.7V - 18V, 4A, 34mOhm eFuse With Fast Overvoltage Protection, 5.7V clamp, Auto-retry, marking ES35, WSON-8: https://www.ti.com/lit/gpn/tps2595

Author:	tcccorp [ January 3rd, 2025, 8:12 ]
Post subject:	Re: T7 try to recover it
hello all, thanks for your replies and your help @Arch Stanton you are right, more information below - on Windows, there is a new entry on the management disk but a message " no media " - on Linux ( When I try to access to /dev/sda, there is an error message who says there is no media) [933052.033318] usb 7-1: new SuperSpeed Plus Gen 2x1 USB device number 5 using xhci_hcd [933052.045643] usb 7-1: New USB device found, idVendor=04e8, idProduct=4001, bcdDevice= 1.00 [933052.045663] usb 7-1: New USB device strings: Mfr=2, Product=3, SerialNumber=1 [933052.045670] usb 7-1: Product: PSSD T7 [933052.045677] usb 7-1: Manufacturer: Samsung [933052.045683] usb 7-1: SerialNumber: 00000Sxxxxxx [933052.046186] usb 7-1: Device is not authorized for usage [933052.051914] scsi host0: uas [933052.052328] usb 7-1: authorized to connect [933056.743328] scsi 0:0:0:0: Direct-Access Samsung PSSD T7 0 PQ: 0 ANSI: 6 [933056.745460] sd 0:0:0:0: Attached scsi generic sg0 type 0 [933056.745615] sd 0:0:0:0: [sda] Media removed, stopped polling [933056.746543] sd 0:0:0:0: [sda] Attached SCSI removable disk @fzabkar please find below values from V1 to V5 V1 : 3.28 V2 : 2.53 V3 : 1.04 V4 : 1.81 V5 : 0.89 ICx looks to be a ES35 188 A3RL but I didn't find the datasheet. Btw i took voltage on pin 4 (Vin?) et 5 (Vout) and both are 5.1 V @sourcerer I ll test later, I don't have my clamp with me to do that thanks again

Author:	fzabkar [ January 3rd, 2025, 15:10 ]
Post subject:	Re: T7 try to recover it
tcccorp wrote: @fzabkar please find below values from V1 to V5 V1 : 3.28 V2 : 2.53 V3 : 1.04 V4 : 1.81 V5 : 0.89 ICx looks to be a ES35 188 A3RL but I didn't find the datasheet. Btw i took voltage on pin 4 (Vin?) et 5 (Vout) and both are 5.1 V @sourcerer I ll test later, I don't have my clamp with me to do that :) thanks again :) Those voltages match up with these: https://www.zeroalpha.com.au/services/data-recovery-blog/ssd/samsung-portable-ssd-t7-shield-1tb-data-recovery https://www.zeroalpha.com.au/images/BRANDS/samsung/samsung-t7-shield-1tb-pcb-voltages-schematic.jpg There is no need for you to look for a datasheet for ES35. I found it in my previous post. There is no need to remove "05b". Just measure the voltage across it. The following ID info appears to be coming from the bridge firmware: Code: [933052.033318] usb 7-1: new SuperSpeed Plus Gen 2x1 USB device number 5 using xhci_hcd [933052.045643] usb 7-1: New USB device found, idVendor=04e8, idProduct=4001, bcdDevice= 1.00 [933052.045663] usb 7-1: New USB device strings: Mfr=2, Product=3, SerialNumber=1 [933052.045670] usb 7-1: Product: PSSD T7 [933052.045677] usb 7-1: Manufacturer: Samsung [933052.045683] usb 7-1: SerialNumber: 00000Sxxxxxx

Author:	tcccorp [ January 3rd, 2025, 19:17 ]
Post subject:	Re: T7 try to recover it
Thanks fzabkar, does it mean everything is OK ? do you know what I can do to debug my issue or retrieve my data ?

Author:	fzabkar [ January 3rd, 2025, 19:55 ]
Post subject:	Re: T7 try to recover it
It appears that there is a firmware problem. I'm guessing that A8/A9 could be a UART port.

Author:

tcccorp [ January 5th, 2025, 14:55 ]

Post subject:

Re: T7 try to recover it

hello

Thanks again for your answer

I tested to find an UART but without success ( I tried with 'safe mode' and without, I'm NOT sure if it is A5 and A6) . if it's an issue with the firmware, maybe it is normal

I dumped flash on the top left. It's a very small one ( only 1Mb and half is empty) . It seems it's not an ARM firmware beacause header look different as we can find on another equipment . After check, SPI pins are connected to the PCI ExpresS to USB bridge

I don't know if I can do something else ie find jyag/swd, ...

Attachments:

Capture d'écran 2025-01-05 194534.png [ 9.75 KiB | Viewed 9535 times ]

Author:	fzabkar [ January 5th, 2025, 15:34 ]
Post subject:	Re: T7 try to recover it
Can you upload the SPI flash dump? I'm just curious. This firmware is used by the bridge. It has no connection to the SSD behind the bridge. The SSD has its own firmware.

Author:

tcccorp [ January 5th, 2025, 16:01 ]

Post subject:

Re: T7 try to recover it

Of course I can

Is there a way to dump the SSD firmware ?

Attachments:

t7.zip [24.47 KiB]
Downloaded 165 times

Author:	fzabkar [ January 5th, 2025, 16:47 ]
Post subject:	Re: T7 try to recover it
I don't know about the SSD firmware. Currently there is no support for your controller in Ace Lab's tools: https://blog.acelaboratory.com/pc-3000-ssd-list-of-supported-ssd-drives-regularly-updated.html

Author:	fzabkar [ January 5th, 2025, 17:58 ]
Post subject:	Re: T7 try to recover it
tcccorp wrote: I don't know if I can do something else ie find jyag/swd, ... @sourcerer has done a lot of JTAG-ing on an 840 Evo.

Author:	tcccorp [ January 10th, 2025, 16:47 ]
Post subject:	Re: T7 try to recover it
Hello, I bought a evo 840 and I'll spend my week end on it

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