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 Post subject: Interpreting Samsung HDD Terminal Output
PostPosted: February 13th, 2018, 23:19 
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Joined: February 13th, 2018, 23:03
Posts: 2
Location: Russia
Hello, hddgurus. Excuse me for my English, I'm good in reading but not in writing.

I have some Samsung HDD, which has clicking of the death.

I connected to its Serial Diagnostic Port and have this messages:
Code:
[SHOS2:|.▒". HPC:33607398*PA VID=0007 PN=0000 Rev=0004
*PA VID=0007 PN=0000 Rev=0 004
PSL
U
S_0Shock Sensor Circuit Enabled
SO_1
Shock Sensor Circuit Enabled
Init RPM=0
IS=6
CLA #36/101
Handoff RPM=503
SPOK
mS1 00000003
A1O=5 A1G=437
O=511 S=4
***** VCM is stucked : status 1
SoUL!
Abnormal end
PK_3 C: 0 H:0
A1O=5 A1G=438
O=511 S=2
***** VCM is stucked : status 1
...
Repeat few times
...
***** VCM is stucked : status 0
SoUL!
Abnormal end
PK_3 C: 0 H:3
Unlatch Fail
Software unloading!
PK_4 C: 0 H:0
Software unloading!
PK_4 C: 0 H:0 (Here HDD stops to try moving heads)
LED 110B (Repeat every second)


Then we opened HDD to view a VCM. There was some small lever, that should open a pass (it try to) for heads. But it can not do this and as following it stuck heads.
So, I just pushed it a little bit, so heads can move on. After that I had this output from serial terminal:

Code:
PA VID=0007 PN=0000 Rev=0004
*PA VID=0007 PN=0000 Rev=0004
PSL
U
S_0Shock Sensor Circuit Enabled
SO_1
Shock Sensor Circuit Enabled
Init RPM=0
IS=4
CLA #36/108
Handoff RPM=493
SPOK
mS1 00000003
A1O=5 A1G=422
O=511 S=4
***** VCM is stucked : status 1
Few tries before I pushed a lever
...
***** VCM is stucked : status 0
SoUL!
Abnormal end
PK_3 C: 0 H:3
A1O=5 A1G=428
O=511 S=2
SK C: 4605 H:0
Loaded FIT ( 0: 0: 1)
Reso Table Loaded
RRO1X Read OK
Overlay Code Loaded to 0x1004A000
FdtTable Loaded. Rev:0x01
| 19 | RLIST | 3 | 0 | 128 | 1140 |
| 19 | RLIST | 3 | 1 | 128 | 1340 |
| 19 | RLIST | 3 | 2 | 128 | 1140 |
Reading Serial Num Pass
Up MC

PwrOn RRO1x @ H0
Table) cos = 827904, sin = -144128
Coeff) cos = 6149, sin = 22083

DiskSlip : 77 [SrvTrk]
DiskSlip : 78 [SrvTrk]

PwrOn RRO1x @ H2
Table) cos = 827904, sin = -143104
Coeff) cos = -5950, sin = 82154

DiskSlip : 77 [SrvTrk]
DiskSlip : 73 [SrvTrk]
TgtCyl: 842
Hd: 0 Zn: 0 Avg.:- 700
TgtCyl: 169771
Hd: 0 Zn: 1 Avg.: 2081

SVCAL(0080,0000)-->PASS
| 167 | DRM | 34 | 0 | 0 | 1140 |
| 167 | DRM | 34 | 1 | 0 | 1340 |
| 55 | SMRT | 19 | 0 | 3 | 1140 |
| 55 | SMRT | 19 | 1 | 3 | 1340 |
rb(e1140 19 0 3 12)
rb(e1340 19 1 3 12)
W-MC e(00001140) (19: 0: 3:0x09:0x0037)
rb(e1140 34 0 0 159)
rb(e1340 34 1 0 159)
W-MC e(00001140) (34: 0: 0:0x0B:0x00A7)
RecordValid Fail : 0107647D 0107E41D
SoUL!
PK_4 C: 8493 H:0
Software unloading!
PK_4 C: 8493 H:0
LED 1A04 (Repeat every second)


Can someone explain this output? Thank you very much.


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 Post subject: Re: Interpreting Samsung HDD Terminal Output
PostPosted: February 14th, 2018, 2:20 
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Joined: November 29th, 2006, 10:08
Posts: 7069
Location: UK
Heads are suspect IMHO, probably damaged when stuck or when you released them.

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 Post subject: Re: Interpreting Samsung HDD Terminal Output
PostPosted: February 14th, 2018, 3:34 
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Joined: September 8th, 2009, 18:21
Posts: 10355
Location: Australia
I would shine up the HDA contacts with a soft eraser just as a precaution.

The drive failed to read 3 copies of the RLIST on heads 0, 1 and 2. The RLIST module is the list of reallocated defects. The drive also failed to read two (all?) copies of the DRM and SMaRT modules.

Samsung Modules List :
http://www.hddoracle.com/viewtopic.php?f=44&t=1175&p=5283

You may be able to clear/rewrite the RLIST (aka ALIST) by following this thread:
viewtopic.php?f=1&p=240389

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 Post subject: Re: Interpreting Samsung HDD Terminal Output
PostPosted: February 14th, 2018, 10:16 
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Joined: December 19th, 2006, 8:49
Posts: 9053
Location: Portugal
I wouldn't go directly to manipulate modules on the drive. I would suspect heads first because aparently the drive was opened and un-stuck. Maybe heads got damaged in the process ?

If you can examine heads (of course inside HEPA 100 clean room with proper tools) and you are sure that surface is ok and heads are ok then you can try to clear the A-List and S.M.A.R.T. .

On Samsung drives if the A-List is damaged then most drives will have problems to process S.M.A.R.T. (because of the re-located sector value). I did had troubles even clearing S.M.A.R.T. on drives with bad A-List so if you are 100% sure that heads are not defective you can start by trying to clear the A-List.

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 Post subject: Re: Interpreting Samsung HDD Terminal Output
PostPosted: February 27th, 2018, 1:07 
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Joined: February 13th, 2018, 23:03
Posts: 2
Location: Russia
Thank you for your answers.

No, I'm not even 1% sure that heads are not defective. But it moving normal when I remove "stucking condition". And I was as gentle as possible.

I think first of all we should replace a heads. We are looking for recepient now.


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 Post subject: Re: Interpreting Samsung HDD Terminal Output
PostPosted: February 27th, 2018, 4:45 
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Joined: August 15th, 2006, 3:01
Posts: 2494
Location: CDRLabs @ Chandigarh [ India ]
Well,
All youtube videos look so easy .IMHO always change to new heads after releasing heads as i have seen very few heads that look kinda ok under a scope after removing headstuck condition

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Website-> http://www.chandigarhdatarecovery.com


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