How to fix the "LED 1A04" problem :

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Spildit
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How to fix the "LED 1A04" problem :

Postby Spildit » Thu Apr 25, 2013 1:42 am

This is a very typical error on Samsung drives, that is normally caused by a damaged A-List.

Code: Select all

For reference :
LED 1A04 = MC read error (under the category "MC Access Errors")


The drive normally spins down and stay busy.

On terminal you will see something like :

Code: Select all

SVCAL(0080,0000)-->PASS
| 167 | DRM | 27 | 0 | 0 | 1140 |
RecordValid Fail : 4107647D 0107E41D
EPOK
SoUL!
PK_4 C: 10148 H:0
Software unloading!
PK_4 C: 10148 H:0
LED 1A04
LED 1A04
LED 1A04
LED 1A04
LED 1A04
LED 1A04
LED 1A04
LED 1A04
LED 1A04
LED 1A04


You will need a Samsung firmware tool that have terminal support like PC3K or SRT.

3 ways of fixing the issue :

1
- Submit LE command in the terminal for access reception to the SA
- Clear A-List
- You might need to clear SMART

2
- Download HTBI
- Clear A-List
- You might have to Clear SMART
- Download Main

3
- Hotswap (to gain access to MC)
- Clear A-List
- You might have to Clear SMART


USING SRT :

- Connect the drive to the SATA port and Terminal. The drive should report BSY on the SRT register status window. Chose the drive on the HDD menu and open the terminal window inside the drive window.
- Make sure the terminal is ON, issue the ESC command, LED message should stop. Write LE and press enter on terminal to gain access to SA.
- Go to "Defects List", "Clear G-List" and "Clear G-list 50".
- You might have to Clear SMART too, so do it; "Actions" - "Clear S.M.A.R.T." .
- Power off and on the drive. The firmware issue should be solved.

For reference - Live example on the forum on how we were able to fix this issue on a Samsung drive using SRT :

viewtopic.php?f=19&t=178
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majsterklepka
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Re: How to fix the "LED 1A04" problem :

Postby majsterklepka » Wed May 21, 2014 7:48 am

Is it possible to make a part of this procedure using SERIAL DISK TERMINAL?

I need to clear SMART on one samsung HDD, but ATA commands for samsung drives are not described well... I have no access to PC3k or other professional disk tools, but I know that they communicate with disks using ATA commands. The right command is what I need now.

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Re: How to fix the "LED 1A04" problem :

Postby Spildit » Wed May 21, 2014 8:21 pm

majsterklepka wrote:Is it possible to make a part of this procedure using SERIAL DISK TERMINAL?

I need to clear SMART on one samsung HDD, but ATA commands for samsung drives are not described well... I have no access to PC3k or other professional disk tools, but I know that they communicate with disks using ATA commands. The right command is what I need now.


Hi there !

I don't known the vendor specific command (ATA) to clear SMART on those drives.

The best that you can do is to buy a cheap Samsung firmware tool like SRT and have it do the job (by ATA).

viewforum.php?f=33

I also don't know how to clear the A-List and the SMART by terminal, or even if it's possible to do so at all.

Regards.
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Re: How to fix the "LED 1A04" problem :

Postby majsterklepka » Fri May 23, 2014 8:51 am

Hi,

SRT works great with ATA & SATA HDD's (only Windows XP), but there is a problem with USB drives, eg: with my STSHM501IX - Samsung S2 Portable USB. This drive is recognised correctly, but I have no access to most of functions - no ID, no SHOW SMART, no CLEAR SMART, no SA modules recognition...
I noticed, that this drive have a serial console contacts, ready to connect a TTL console and this commands are really needed.... or... maybe.... Is there any trick to force the SRT to work with this HDD?

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Re: How to fix the "LED 1A04" problem :

Postby Spildit » Fri May 23, 2014 10:01 pm

majsterklepka wrote:Hi,

SRT works great with ATA & SATA HDD's (only Windows XP), but there is a problem with USB drives, eg: with my STSHM501IX - Samsung S2 Portable USB. This drive is recognised correctly, but I have no access to most of functions - no ID, no SHOW SMART, no CLEAR SMART, no SA modules recognition...
I noticed, that this drive have a serial console contacts, ready to connect a TTL console and this commands are really needed.... or... maybe.... Is there any trick to force the SRT to work with this HDD?


With USB drives you will have to convert the PCB to SATA or use a SATA compatible pcb.

This is also valid for the other firmware tools, like PC-3000 UDMA.

The reason is that the USB bridge will not handle correctly the vendor specific commands.

The only option is bypass the USB bridge and "talk" the drive by SATA.

Regards.
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