Now on my OSX I see the message:
"The disk you inserted was not readable by this computer"
I'm trying to learn how to fix this partition using testdisk. I'm not sure what kind of partition it was at all? Was it FAT or NTFS or something else?
I downloaded whole sd card to disk using:
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sudo ddrescue /dev/disk2 ~/tomek.dd ~/tomek.log
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sudo ./testdisk ~/tomek.dd
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TestDisk 7.2-WIP, Data Recovery Utility, July 2019
Christophe GRENIER <grenier@cgsecurity.org>
https://www.cgsecurity.org
Disk /Users/kapucha/tomek.dd - 32 GB / 30 GiB
Please select the partition table type, press Enter when done.
[Intel ] Intel/PC partition
>[EFI GPT] EFI GPT partition map (Mac i386, some x86_64...)
[Humax ] Humax partition table
[Mac ] Apple partition map (legacy)
[None ] Non partitioned media
[Sun ] Sun Solaris partition
[XBox ] XBox partition
[Return ] Return to disk selection
Note: Do NOT select 'None' for media with only a single partition. It's very
rare for a disk to be 'Non-partitioned'.
Should I setup some additional disk geometry settings if I copied this sd card to my local ssd disk? I'm asking because there is a note in app:
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Note: Correct disk geometry is required for a successful recovery. 'Analyse'
process may give some warnings if it thinks the logical geometry is mismatched.
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Disk /Users/kapucha/tomek.dd - 32 GB / 30 GiB - CHS 3917 255 63
Current partition structure:
Partition Start End Size in sectors
Bad GPT partition, invalid signature.
Trying alternate GPT
Bad GPT partition, invalid signature.
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Disk /Users/kapucha/tomek.dd - 32 GB / 30 GiB - CHS 3917 255 63
Current partition structure:
Partition Start End Size in sectors
Partition sector doesn't have the endmark 0xAA55