cgsecurity.org

Please help. I am trying to write a new partición table
(see previous post) but TestDisk says:

Boot sector
Status: Bad
What now?

"Rebuild BS", "Write" and reboot?

Thank you in advance.

Hello again
After 12 days scanning the cloned 2TB HDD, I was ready to try to rescue the partition table.
Both 2TB HDDs seems identicals. Nice


TestDisk 7.2-WIP, Data Recovery Utility, July 2019
Christophe GRENIER <grenier@cgsecurity.org>
https://www.cgsecurity.org

Disk /dev/rdisk4 - 2000 GB ...

Question 2: Do you recommend me to act over the cloned disk? I mean, to repeat all steps in the cloned disk: scanning it and trying to repair cloned partition table?

Modifications of a partition table in GPT format are not as risky as modifying the old style ones.
Nevertheless, I would ...

Thank you in davance.
Last two questions before proceed.

Ok. I am ready to proceed with the recovery (please see my first post if you need more information)

General steps:

1- I used Testdisk, with deep search (20 days about) to find lost partitions, and I found it
>D MS Data 2048 3867961343 ...

Finished

ipos: 2000 GB, non-trimmed: 0 B, current rate: 5199 kB/s
opos: 2000 GB, non-scraped: 0 B, average rate: 7242 kB/s
non-tried: 0 B, bad-sector: 0 B, error rate: 0 B/s
rescued: 2000 GB, bad areas: 0, run time: 3d 4h 43m
pct rescued: 0.00%, read errors: 0, remaining time: n/a
time since ...

The non-tried area can not be bigger than your disk size of 2TB.
Your screenshot shows that you already duplicated 600 GB (not 60 GB as you said) out of 2 TB = 2000 GB which is 30%.
Both figures are wrong.
Ignore them and let the copy process finish. You can research these errors or file a bug ...

Sorry...
This ones
Is it important?
Thank you for your replies.

Not really. With an old Thinkpad from 2008 combined with an USB 3.0 expresscard I get transfer rates of 60-70MB/sec on file level with h2testw.


ok

It's only the huge disk size in "PB" and the rescue figure of 0% that makes me wonder.


As a practice...I have tried before to cloning 4 GiB USB ...

I never used the -f parameter because I duplicated to empty disks.

If you know the sustained tranfer rate of your drive and ddrescue seems to be slow without showing read errors for sectors play around with the -c parameter:

[...-c sectors
--cluster-size=sectors
Number of sectors to copy at a ...

Ok.
I proceed to clon the disk with ddrescue to anothe 2TB HHD.

Fom
Descripción del disco : TOSHIBA External USB 3.0 Media Capacidad total : 2 TB (2.000.398.931.968 bytes)
To:
Descripción del disco : TOSHIBA External USB 3.0 Media Capacidad total : 2 TB (2.000.398.934.016 bytes)

with:
unmount ...