Dell MZ 5EA1000 - Unusual Components

[ddrecovery]

Anyone have any idea what these additional components are on this SSD? It's a Samsung 470.

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[LarrySabo]

My first thought was Peltier coolers but I don't think NANDs produce enough heat to justify them. Plus, heat transfer through the plastic wrap would be poor. Maybe they're heaters? I have no idea.

[ddrecovery]

My first thought was Peltier coolers but I don't think NANDs produce enough heat to justify them. Plus, heat transfer through the plastic wrap would be poor. Maybe they're heaters? I have no idea.

Thanks Larry. We may need Fzabkar's brain for this one.....

[fzabkar]

As strange as it may seem, they appear to be battery packs. The clue is in the two 10-pin "BPT" chips (are there 4 of these?).

TPS63000, Texas Instruments, High-Efficient Single Inductor Buck-Boost Converter With 1.8A Switches, 1.8V - 5.5V in, 1.2V - 5.5V out or fixed 3.3V, marking BPT, VSON-10:
http://www.ti.com/lit/ds/symlink/tps63000.pdf

The TPS6300x devices provide a power supply solution for products powered by either a two-cell or three-cell alkaline, NiCd or NiMH battery, or a one 1.2 V to 5.5 V cell Li-ion or Li-polymer battery. Output currents can go as high as 1200 mA while using a single-cell Li-ion or Li-polymer battery, and discharge it down to 2.5 V or lower.

It would help to identify the other chips. There must be at least one battery charge controller, unless the batteries are simply trickle charged.

I expect that there should be 4 MOSFETs, but I can only see 3.

RSY160P05, Rohm, 4V Drive Pch MOSFET, -45V, +/-16A, TCPT:
http://datasheet.elcodis.com/pdf2/98/50/985058/rsy160p05.pdf


Edit:

This review identifies them as ultra-capacitors for power failure protection:

https://www.storagereview.com/samsung_ssd_sm825_enterprise_ssd_review

[ddrecovery]

You are right they are battery packs. I was looking for chips and you can see underneath the battery cover there are four ++++ marks down the one side of the battery. These are sold as enterprise level drives, so I suspect the batteries are used to prevent data loss in some way. Well spotted.

[fzabkar]

You are right they are battery packs. I was looking for chips and you can see underneath the battery cover there are four ++++ marks down the one side of the battery. These are sold as enterprise level drives, so I suspect the batteries are used to prevent data loss in some way. Well spotted.

See my edit. Are they not supercapacitors? Batteries would be heavy. Also, supercapacitors would be charged to +5V, or perhaps +12V (according to the label).

[ddrecovery]

They are indeed supercapacitors. Interesting article.

[suricate.ch]

Hello all,

I got the same drive. Drive stay BSY. It was in a DELL server, running a VM. It doesn't look exactly like Samsung 470 from ACE Doc but very close. I believe safe mode should be in the area I've circle in red but not sure which one. Anyone had success with that drive in the past?

Thanks
Gab

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[fzabkar]

I'm wondering whether the procedure involves shorting the Ready/*Busy NAND pins to ground.

[suricate.ch]

CPU is S3C29MAX01-Y330. Very similar to 470 series, they have S3C29MAX01-Y340

[fzabkar]

The R/*B pins require a pullup resistor, so that would be a likely place. The other end of the resistor would be connected to the NAND supply.

You may also find that R/*B is bussed to several NANDs, so a continuity test would provide added confirmation.

[suricate.ch]

I'm wondering whether the procedure involves shorting the Ready/*Busy NAND pins to ground.

The NAND that are on the other side where Ultra-Capacirot are ?

[fzabkar]

See the ONFI BGA-136 ball definitions on page 24 of the following document:

http://www.onfi.org/-/media/client/onfi/specs/jesd230c.pdf?la=en

There are four R/B pins. These are open drain, so they can be wire-OR-ed and shorted to ground without risk of physical damage.

The photo clip shows the 4 pullup resistors connected between each R/B ball and the Vccq I/O supply.

You can short any of the R/B test points to ground, but you must not short the other side of the resistor. That would short circuit the Vccq supply.

Without seeing your PC3K documentation, I can only assume that this is the correct procedure.

I assume that these same test points are connected to more than one NAND IC. If not, then you will need to find the corresponding resistors on the other side of the PCB.

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[Agrail]

Safe mode is here.

See the documentation for the PC-3000.

[suricate.ch]

Safe mode is here.

1.png

See the documentation for the PC-3000.

Thank you all.

PC-3000 described those pin as safe mode access for 830 series so I didn't tried but you are right it's working. After identinfing pin 6 (always GND) I short pin 1 and 2 and SSD goes safe mode.
I tried all 4 loader upload but it's always failing.

*******************************************************

Selected family......................... : Samsung 470 series
Controller.............................. : S3C29MAX01-Y340

Model................................... : Passport not loaded

SSD status:
SSD is in ready state................... : Yes
SSD is locked........................... : No
SSD is in Safe Mode..................... : Yes
Loader uploaded......................... : No
Logical access is possible.............. : No
Physical access is possible............. : No

Loader uploading
****************************************
Code name............................... : 470A_LD.ldr

Write HDD microcode
SSD not ready (1)

[suricate.ch]

Ok, I've tried everything (all possible test point), no luck. I get safe mode but impossible to get into ROM mode. If someone had same drive, can you try?

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no_loader.PNG (12.65 KiB) Viewed 13675 times