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ST500LM000 - determine PREAMP VALUE ?

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DIAGS4711

Post subject: ST500LM000 - determine PREAMP VALUE ?

Posted: October 1st, 2019, 10:16

Joined: November 17th, 2007, 5:38
Posts: 27

Hi,

who can determine the right PREAMP value (see my patient ROM file).
May be with PC-3000 or MRT .....
(Terminal not work -> CTRL + L, hdd is damaged!)

Thanks for help!

Attachments:

STR_ST500LM000_Patient_ROM.zip [650.63 KiB]
Downloaded 468 times

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mr_spokk

Post subject: Re: ST500LM000 - determine PREAMP VALUE ?

Posted: October 1st, 2019, 10:26

Joined: May 21st, 2007, 16:10
Posts: 1592
Location: Gothenburg/ Sweden

Looks like D0 00

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DIAGS4711

Post subject: Re: ST500LM000 - determine PREAMP VALUE ?

Posted: October 2nd, 2019, 6:48

Joined: November 17th, 2007, 5:38
Posts: 27

Thanks for help!

I can not find a hdd with the right preamp value.

I could get donor drives with D0 74 / D0 67 and so on (D0 XX serie).

Whats are your experiences with this hdd ?, other persons says take any hdd with D0 and XX value).

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digisupport

Post subject: Re: ST500LM000 - determine PREAMP VALUE ?

Posted: October 2nd, 2019, 7:22

Joined: March 6th, 2010, 3:46
Posts: 627
Location: Kolding | Denmark

Any D0 XX should work just fine.

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michael chiklis

Post subject: Re: ST500LM000 - determine PREAMP VALUE ?

Posted: October 2nd, 2019, 9:46

Joined: December 5th, 2011, 5:38
Posts: 1741
Location: Verona, Italy

pre amp value indicated in your rom is D0 00

Attachment:

D0 00.jpg [ 635.22 KiB | Viewed 9032 times ]

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DIAGS4711

Post subject: Re: ST500LM000 - determine PREAMP VALUE ?

Posted: October 2nd, 2019, 11:14

Joined: November 17th, 2007, 5:38
Posts: 27

Thanks to mr_spokk, digisupport and michael chiklis.

I will test new heads with a D0 XX PREAMP.

Question the PREAMP bytes are not a fixed offset !? (as far as I know).

How can i calculate the right position ?
Or is the right position in a another byte offset like MR jogs (WD - mod. 47 0x20).

Thanks for any info.

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pcimage

Post subject: Re: ST500LM000 - determine PREAMP VALUE ?

Posted: October 2nd, 2019, 13:25

Joined: November 29th, 2006, 10:08
Posts: 7864
Location: UK

digisupport wrote:

Any D0 XX should work just fine.

+1 agree

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fzabkar

Post subject: Re: ST500LM000 - determine PREAMP VALUE ?

Posted: October 2nd, 2019, 16:28

Joined: September 8th, 2009, 18:21
Posts: 16963
Location: Australia

Locating the preamp ID in a Seagate F3 ROM:
http://www.hddoracle.com/viewtopic.php?f=59&t=2173&start=60#p18028

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DIAGS4711

Post subject: Re: ST500LM000 - determine PREAMP VALUE ?

Posted: October 4th, 2019, 11:43

Joined: November 17th, 2007, 5:38
Posts: 27

Thanks, i find the oracle post yesterday.

I find now a compatible head-stack, and can copy data.

But i have to many read errors (heavy head-stiction) and can not clear the g-list.
Media cache and so on are disabled, i have the mods, but can not copy0 sys file 1b
(copy1 are ok).

Thanks for any help!

Terminal output:___________

F3 T>i4,1,22
i4,1,22

RECOV Servo Op=0055 Resp=0005

SIM Exception Code: 0005

LED:000000BC FAddr:0000905B
Rst 0x40M
Servo Processor Is Reset.

Spin Up

Spin issued

RECOV Servo Op=0100 Resp=0005
TCC:001C
RECOV Servo Op=0165 Resp=0005

LED:000000BC FAddr:0000905B

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mr_spokk

Post subject: Re: ST500LM000 - determine PREAMP VALUE ?

Posted: October 4th, 2019, 12:49

Joined: May 21st, 2007, 16:10
Posts: 1592
Location: Gothenburg/ Sweden

Try clone one head at the time, maby head 0 need another swap?

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