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gameboybin
 Post subject: ST500LT012 - Spinup Failure ServoLoopCode=0x0000007F
PostPosted: April 10th, 2025, 4:56 
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Joined: April 17th, 2022, 22:39
Posts: 203
Location: Vietnam
I've read through some old post with this error but still didn't get any conclusions, any answers.
Now i am encountering this myself. Really want to know solution to this

I got a Seagate 500GB laptop drive

Model : ST500LT012-1DG142
Serial : S3PNCWJX
Firmware : 0002
Capacity : 4 GB (8 089 950)

The drive came in clicking - So i changed the heads. The drive then click twice then spins down. Got RDY state. But cannot do anything. Any option will lead to
Spinup Failure
ServoLoopCode=0x0000007F

I thought it might be the Heads problem so i swapped the heads back to original donor and it came up fine. So it was not the heads problem
I procced to change new set of Heads> This time the drives comes RDY and i can enter sectors. But upon backing up Modules. The drive hanged and got to the same state again
Spinup Failure
ServoLoopCode=0x0000007F

Now i am changing 3rd pair of heads but the errors stays the same
So if anyone came in with a solution can you guys help me out!
Many Thanks!

Code:
Boot 0x10M
FAIL  Servo Op=0100 Resp=0007
ResponseFrame 0D21 3A22 FFFE 0000 0000 D8A9 0000 FF8F 0000 0001 0000 0000 0000 0000 0000 0000 A06F CEA7 E927 7F76 C882 BFA0 C824 D9CC F290 3FBE CE38 6CB9 4F15 9B69 877C 2121 0000
FAIL  Servo Op=0100 Resp=0003
ResponseFrame 0000 3A3F FFFD 0000 0000 D8F4 00A1 FF90 0000 0003 0000 0000 0000 0000 0000 0000 A06F CEA7 E927 7F76 C882 BFA0 C824 D9CC F290 3FBE CE38 6CB9 4F15 9B69 877C 2121 0000
Spinup Failure
ServoLoopCode=0x0000007F
FAIL  Servo Op=0100 Resp=0003
ResponseFrame 0000 3A20 FFFE 0000 0000 D8A4 009D FF90 0000 0003 0000 0000 0000 0000 0000 0000 A06F CEA7 E927 7F76 C882 BFA0 C824 D9CC F290 3FBE CE38 6CB9 4F15 9B69 877C 2121 0000
FAIL  Servo Op=0100 Resp=0003
ResponseFrame 0000 3A38 FFFA 0000 0000 D90D 009E FF90 0000 0003 0000 0000 0000 0000 0000 0000 A06F CEA7 E927 7F76 C882 BFA0 C824 D9CC F290 3FBE CE38 6CB9 4F15 9B69 877C 2121 0000
Spinup Failure
ServoLoopCode=0x0000007F
FAIL  Servo Op=0100 Resp=0003
ResponseFrame 0000 3A39 FFFE 0000 0000 D8E1 00B1 FF91 0000 0003 0000 0000 0000 0000 0000 0000 A06F CEA7 E927 7F76 C882 BFA0 C824 D9CC F290 3FBE CE38 6CB9 4F15 9B69 877C 2121 0000
FAIL  Servo Op=0100 Resp=0003
ResponseFrame 0000 3A41 FFFB 0000 0000 D907 00A8 FF91 0000 0003 0000 0000 0000 0000 0000 0000 A06F CEA7 E927 7F76 C882 BFA0 C824 D9CC F290 3FBE CE38 6CB9 4F15 9B69 877C 2121 0000
Spinup Failure
ServoLoopCode=0x0000007F
FAIL  Servo Op=0100 Resp=0003
ResponseFrame 0000 3A31 FFFD 0000 0000 D8E7 00AD FF91 0000 0003 0000 0000 0000 0000 0000 0000 A06F CEA7 E927 7F76 C882 BFA0 C824 D9CC F290 3FBE CE38 6CB9 4F15 9B69 877C 2121 0000
FAIL  Servo Op=0100 Resp=0003
ResponseFrame 0000 3A28 FFFD 0000 0000 D8D9 00B3 FF91 0000 0003 0000 0000 0000 0000 0000 0000 A06F CEA7 E927 7F76 C882 BFA0 C824 D9CC F290 3FBE CE38 6CB9 4F15 9B69 877C 2121 0000
Spinup Failure
ServoLoopCode=0x0000007F
FAIL  Servo Op=0100 Resp=0003
ResponseFrame 0000 3A2C FFFE 0000 0000 D8CA 00B1 FF8F 0000 0003 0000 0000 0000 0000 0000 0000 A06F CEA7 E927 7F76 C882 BFA0 C824 D9CC F290 3FBE CE38 6CB9 4F15 9B69 877C 2121 0000
FAIL  Servo Op=0100 Resp=0003
ResponseFrame 0000 3A44 0000 0000 0000 D905 00A5 FF90 0000 0003 0000 0000 0000 0000 0000 0000 A06F CEA7 E927 7F76 C882 BFA0 C824 D9CC F290 3FBE CE38 6CB9 4F15 9B69 877C 2121 0000
Spinup Failure
ServoLoopCode=0x0000007F
FAIL  Servo Op=0100 Resp=0003
ResponseFrame 0000 3A3B FFFD 0000 0000 D8FA 00C7 FF90 0000 0003 0000 0000 0000 0000 0000 0000 A06F CEA7 E927 7F76 C882 BFA0 C824 D9CC F290 3FBE CE38 6CB9 4F15 9B69 877C 2121 0000
FAIL  Servo Op=0100 Resp=0003
ResponseFrame 0000 3A3F FFFE 0000 0000 D92E 00DB FF93 0000 0003 0000 0000 0000 0000 0000 0000 A06F CEA7 E927 7F76 C882 BFA0 C824 D9CC F290 3FBE CE38 6CB9 4F15 9B69 877C 2121 0000
Spinup Failure
ServoLoopCode=0x0000007F
FAIL  Servo Op=0100 Resp=0003
ResponseFrame 0000 3A3F FFFD 0000 0000 D90E 00D9 FF91 0000 0003 0000 0000 0000 0000 0000 0000 A06F CEA7 E927 7F76 C882 BFA0 C824 D9CC F290 3FBE CE38 6CB9 4F15 9B69 877C 2121 0000
FAIL  Servo Op=0100 Resp=0003
ResponseFrame 0000 3A47 FFFF 0000 0000 D8E6 00E6 FF92 0000 0003 0000 0000 0000 0000 0000 0000 A06F CEA7 E927 7F76 C882 BFA0 C824 D9CC F290 3FBE CE38 6CB9 4F15 9B69 877C 2121 0000
Spinup Failure
ServoLoopCode=0x0000007F
FAIL  Servo Op=0100 Resp=0003
ResponseFrame 0000 3A20 FFFD 0000 0000 D8F5 00E9 FF92 0000 0003 0000 0000 0000 0000 0000 0000 A06F CEA7 E927 7F76 C882 BFA0 C824 D9CC F290 3FBE CE38 6CB9 4F15 9B69 877C 2121 0000
FAIL  Servo Op=0100 Resp=0003
ResponseFrame 0000 3A34 FFFB 0000 0000 D93C 00E6 FF92 0000 0003 0000 0000 0000 0000 0000 0000 A06F CEA7 E927 7F76 C882 BFA0 C824 D9CC F290 3FBE CE38 6CB9 4F15 9B69 877C 2121 0000
Spinup Failure
ServoLoopCode=0x0000007F
FAIL  Servo Op=0100 Resp=0003
ResponseFrame 0000 3A30 FFFF 0000 0000 D93A 00EC FF93 0000 0003 0000 0000 0000 0000 0000 0000 A06F CEA7 E927 7F76 C882 BFA0 C824 D9CC F290 3FBE CE38 6CB9 4F15 9B69 877C 2121 0000
FAIL  Servo Op=0100 Resp=0003
ResponseFrame 0000 3A45 FFFE 0000 0000 D919 00E9 FF90 0000 0003 0000 0000 0000 0000 0000 0000 A06F CEA7 E927 7F76 C882 BFA0 C824 D9CC F290 3FBE CE38 6CB9 4F15 9B69 877C 2121 0000
Spinup Failure
ServoLoopCode=0x0000007F


Attachments:
Screenshot 2025-04-10 155554.png
Screenshot 2025-04-10 155554.png [ 85.72 KiB | Viewed 17980 times ]
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gameboybin
 Post subject: Re: ST500LT012 - Spinup Failure ServoLoopCode=0x0000007F
PostPosted: April 10th, 2025, 4:57 
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Joined: April 17th, 2022, 22:39
Posts: 203
Location: Vietnam
I have checked disk surfaces. It is mint, have no scratches what so ever
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gameboybin
 Post subject: Re: ST500LT012 - Spinup Failure ServoLoopCode=0x0000007F
PostPosted: April 10th, 2025, 6:18 
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Joined: April 17th, 2022, 22:39
Posts: 203
Location: Vietnam
My case is exactly like this one

https://forum.hddguru.com/viewtopic.php?f=1&t=39512
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aekhv
 Post subject: Re: ST500LT012 - Spinup Failure ServoLoopCode=0x0000007F
PostPosted: April 10th, 2025, 7:15 
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User avatar

Joined: September 11th, 2024, 10:21
Posts: 63
Location: Russia
It may be a well known bug of Yarra_5400. Try to clear CE Log in ROM. And make sure that patient's heads are fine, test them in donor drive first.
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gameboybin
 Post subject: Re: ST500LT012 - Spinup Failure ServoLoopCode=0x0000007F
PostPosted: April 10th, 2025, 22:03 
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Joined: April 17th, 2022, 22:39
Posts: 203
Location: Vietnam
aekhv wrote:
It may be a well known bug of Yarra_5400. Try to clear CE Log in ROM. And make sure that patient's heads are fine, test them in donor drive first.


Can you guide me through it. I cannot get access to the terminal. It keeps Showing the same error even with the PCB off

Code:
Boot 0x10M
FAIL  Servo Op=0100 Resp=0003
ResponseFrame FFFF 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 FA30 8761 DFD6 5CF9 CA70 81E2 DA60 0051 8313 0DD3 7F1B E581 3ACE A2C0 3142 2E81 0000
FAIL  Servo Op=0100 Resp=0003
ResponseFrame 25D4 0001 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 FA30 8761 DFD6 5CF9 CA70 81E2 DA60 0051 8313 0DD3 7F1B E581 3ACE A2C0 3142 2E81 0000
Spinup Failure
ServoLoopCode=0x00000029
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aekhv
 Post subject: Re: ST500LT012 - Spinup Failure ServoLoopCode=0x0000007F
PostPosted: April 10th, 2025, 22:13 
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User avatar

Joined: September 11th, 2024, 10:21
Posts: 63
Location: Russia
I don't know how it looks in english interface. Do you know drop-down menu where Rosewood ROM patch located? Clear CE Log option is in same menu too.
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gameboybin
 Post subject: Re: ST500LT012 - Spinup Failure ServoLoopCode=0x0000007F
PostPosted: April 11th, 2025, 2:57 
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Joined: April 17th, 2022, 22:39
Posts: 203
Location: Vietnam
This must be some problem with ROM i believe. After changing heads 3 times, and changing platters to other case. I realized something is messing with the spinning motor.

When changing heads. The drive still clicks 2 times then stops. Reason i think is the motor doesn't even want to spin fast enough to let the heads get on the platters

Then i tried changing platters. On the 1st turn on of the drive. The drives ID normally, and you can even read sectors. But as soon as you turn off the drive (to change some settings) Turning it on will give it back same error state as before
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gameboybin
 Post subject: Re: ST500LT012 - Spinup Failure ServoLoopCode=0x0000007F
PostPosted: April 11th, 2025, 3:02 
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Joined: April 17th, 2022, 22:39
Posts: 203
Location: Vietnam
One more thing to add. I tried turning on the PCB only, without the drive. The error persists. It is like the error is infused into ROM
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fzabkar
 Post subject: Re: ST500LT012 - Spinup Failure ServoLoopCode=0x0000007F
PostPosted: April 11th, 2025, 3:07 
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Joined: September 8th, 2009, 18:21
Posts: 16955
Location: Australia
Upload your ROM?

_________________
A backup a day keeps DR away.
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gameboybin
 Post subject: Re: ST500LT012 - Spinup Failure ServoLoopCode=0x0000007F
PostPosted: April 11th, 2025, 3:33 
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Joined: April 17th, 2022, 22:39
Posts: 203
Location: Vietnam
fzabkar wrote:
Upload your ROM?


Uploaded


Attachments:
ROM.rar [180.96 KiB]
Downloaded 511 times
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fzabkar
 Post subject: Re: ST500LT012 - Spinup Failure ServoLoopCode=0x0000007F
PostPosted: April 11th, 2025, 4:43 
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User avatar

Joined: September 8th, 2009, 18:21
Posts: 16955
Location: Australia
It looks like your model has no CE_LOG, so the problem must be something else.

_________________
A backup a day keeps DR away.
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gameboybin
 Post subject: Re: ST500LT012 - Spinup Failure ServoLoopCode=0x0000007F
PostPosted: April 11th, 2025, 10:19 
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Joined: April 17th, 2022, 22:39
Posts: 203
Location: Vietnam
fzabkar wrote:
It looks like your model has no CE_LOG, so the problem must be something else.


yeah i don't know what could be the Problem
+ I swapped PCB, the error is persistent
+ I tried turning PCB on only. The error still persistent even without HDD. It still Shows same error
+ I tested heads back in donor. They are fully functional
+ I swapped platters. Which Made the drive fully ID and start once. From the second start the drive gets the same error
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gameboybin
 Post subject: Re: ST500LT012 - Spinup Failure ServoLoopCode=0x0000007F
PostPosted: April 13th, 2025, 14:44 
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Joined: April 17th, 2022, 22:39
Posts: 203
Location: Vietnam
Can anyone help??
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