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Seagate Bogart 2 TB with large data http://forum.hddguru.com/viewtopic.php?f=11&t=41411	Page 1 of 1

Author:

terminator2 [ June 16th, 2021, 10:16 ]

Post subject:

Seagate Bogart 2 TB with large data

hi friends
I have got a Seagate Pipe Line 2 TB disk ( ST2000DL001 / FW -- CC96 ) Bogart family.
Disk has 6 heads. It has massive 3.5Gb MFT and 1.7TB data.
I have taken full FW backup , disabled SMP flags , disk is giving clear sector access except for head 1 which is having large surface defects .
I want to know what should I do now as I dont want to take any risks with client data.
I think head 1 not damaged or weak as later it also reads at normal speed.
How can I refine and fine tune system files /firmware modules so that disk will give smooth access.
It is giving LED EE error .

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Author:	pepe [ June 16th, 2021, 13:47 ]
Post subject:	Re: Seagate Bogart 2 TB with large data
Isn't AltList full by any chance? WHen do you get the LED? pepe

Author:

terminator2 [ June 17th, 2021, 3:17 ]

Post subject:

Re: Seagate Bogart 2 TB with large data

pepe wrote:

Isn't AltList full by any chance?
WHen do you get the LED?

pepe

Wo Thanks sir
Its great you have identified Alt list overflow without physical diagnostics.
yes Alt list is showing more than 8000 entries ( 1FFF ).
What should I do with them , earlier I use to erase alt list and then recover translator which use to worsen the problem.
disk is not giving LED error now , but detection has become slower and it tends to become busy.

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Author:	pepe [ June 17th, 2021, 3:41 ]
Post subject:	Re: Seagate Bogart 2 TB with large data
just erase altlist in ram and clone the disk. No need to regen tr. pepe

Author:	terminator2 [ June 17th, 2021, 4:48 ]
Post subject:	Re: Seagate Bogart 2 TB with large data
I have cleared Alt list now there are no defects anymore.But still I am experiencing bad sectors. I have erased actual alt list instead of erasing in ram.

Author:	Lardman [ June 17th, 2021, 5:04 ]
Post subject:	Re: Seagate Bogart 2 TB with large data
What read settings have you tried. Is this pattern only repeated in one zone. Is this what you mean by large surface defects or was there an area with continuous read errors.

Author:	terminator2 [ June 17th, 2021, 7:31 ]
Post subject:	Re: Seagate Bogart 2 TB with large data
Hi Lardman Unfortunately now disk has sopped detection itself and disk is staying in busy state. Bad sectors are randomly distributed and not restricted in particular pattern only. I think deleted Alt list has created big issue and all sectors were showing bad in earlier scanning. I am trying to restore firmware /system files so as to take system to previous state ,but its nt getting restored. Though system files /firmware modules are backed up they dont appear when I select backup folder. What could be reason for the same ?

Author:	pepe [ June 17th, 2021, 11:08 ]
Post subject:	Re: Seagate Bogart 2 TB with large data
erasing the altlist won't save you from bad sectors of course, it was only to avoid the LED. and it did not cause your current problem, most probably some head is failing. Can you post log of powerup? pepe

Author:	Lardman [ June 17th, 2021, 17:13 ]
Post subject:	Re: Seagate Bogart 2 TB with large data
When backing up the rom initially did you remember to untick skip modules?

Author:

terminator2 [ June 18th, 2021, 4:34 ]

Post subject:

Re: Seagate Bogart 2 TB with large data

Hi pepe & Lardman
Thanks for your help.
Yes I have selected all modules and system files ,infact in drives profile these files and rom are present but when trying to restore ,they do not appear .
Now symptoms of disk have changed altogether.
Here is screenshot.

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Author:	Lardman [ June 18th, 2021, 8:39 ]
Post subject:	Re: Seagate Bogart 2 TB with large data
Not one I've come across yet I'm afraid but there's plenty of search results for it. John's info at the bottom looks relevant and ACE suggest disabling background processes. https://www.cheadledatarecovery.co.uk/2019/02/head-assembly-swap-seagate-st31000528as/

Author:	pepe [ June 18th, 2021, 19:09 ]
Post subject:	Re: Seagate Bogart 2 TB with large data
try to identify what's wrong with the SA, and concentrate on that, a guesswork won't help a lot here. I mean i can only guess from here, but you can identify the problem having the disk with you. i think 3_28 was not written correctly, (that's why i suggested clearing altlist it only in ram). pepe

Author:	terminator2 [ June 18th, 2021, 23:48 ]
Post subject:	Re: Seagate Bogart 2 TB with large data
Lardman wrote: Not one I've come across yet I'm afraid but there's plenty of search results for it. John's info at the bottom looks relevant and ACE suggest disabling background processes. https://www.cheadledatarecovery.co.uk/2019/02/head-assembly-swap-seagate-st31000528as/ Thanks a lot Lardam john has given detailed explanation , its very much useful

Author:	terminator2 [ June 18th, 2021, 23:49 ]
Post subject:	Re: Seagate Bogart 2 TB with large data
pepe wrote: try to identify what's wrong with the SA, and concentrate on that, a guesswork won't help a lot here. I mean i can only guess from here, but you can identify the problem having the disk with you. i think 3_28 was not written correctly, (that's why i suggested clearing altlist it only in ram). pepe yes , but even without physical access you have been able to identify the issue. You have great expertise on seagate. I will focus on SA.Thanks a lot.

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