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edit approved Nov 16, 2022 at 10:16

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Mac Catalina - Disk Recovery PaticioningPartitioning - 2 or 1

I have a macMac, which was running Catalina. For some reason the disk corrupted itself and I needneeded to rebuild it.

I've done some googlegoogling and have also spoken with apple support and getApple Support, but got conflicting infoinformation.

I'm not a macMac expert, but do have a lot of experience working with os'sOSs at low levels.

I also have many months' worth of time machineTime Machine archives.

From memory, the disk had 2 partitions. 1, one for the osOS and 1one for data. This was confirmed by apple supportApple Support. I cantcan't find any info about this config on googleGoogle, which only mentions a single partition.

I'm used to the idea of an osOS disk and data disk, that's how I structure my linuxLinux boxes.

What I cantcan't find are sizes and types. Apple support didApple Support could not know ???? I'mtell me about those. I'm thinking that the osOS partition should be small may be 240G ( thatthat works well for linuxLinux).

The and the data uses the rest of the disk.

Disk Utilities in recovery ( cmd r Cmd+R) basically lets me choose fatFAT, ex fatEx-FAT and the normal appleApple types. WhenWhen I tried booting I got the white screen with nothe "no entry sign,sign". I then booted cmd rusing Cmd+R and ran disk repair, itDisk Repair. It mentioned efiEFI, which again ImI'm used to. But, but could not find an option to let me select efiEFI as a type.

Would someone please tell me what partitions do I need and how to create them from cmd r boota Cmd+R boot?

I could spilt this into a few different questions each asking about a specific point but they will lead back to the overall question/request for the info above.

Not sure if this is relevant or a different issue. AssumePlease assume I go for the 2-patictionpartition model.

My time machine showTime Machine shows me 2 options from the drop-down list 1, one for osOS and 1one for data. I choose a date and restored the osOS archive to the os participationOS partition.

That worked and it rebooted itself and went to recovery menu.

I then got to restore from tmTM, selectselected the same date and restorerestored the data to the destination of the data participationpartition. It runs for a while may be, maybe 10 - 15 mins, then opens a dialog saying errors and reboots.

IveI've tried this for several dates. As I say, not sure if itsit's all connected to the original question or not.

Thanks for any help Jeff.

Mac Catalina - Disk Recovery Paticioning - 2 or 1

I have a mac which was running Catalina. For some reason the disk corrupted itself and I need to rebuild it.

I've done some google and also spoken with apple support and get conflicting info.

I'm not a mac expert but do have a lot of experience working with os's at low levels.

I also have many months' worth of time machine archives.

From memory, the disk had 2 partitions. 1 for the os and 1 for data. This was confirmed by apple support. I cant find info about this config on google which only mentions a single partition.

I'm used to the idea of an os disk and data disk, that's how I structure my linux boxes.

What I cant find are sizes and types. Apple support did not know ???? I'm thinking the os partition should be small may be 240G ( that works well for linux).

The data uses the rest of the disk.

Disk Utilities in recovery ( cmd r ) basically lets me choose fat, ex fat and the normal apple types. When I tried booting I got the white screen with no entry sign, booted cmd r and ran disk repair, it mentioned efi, which again Im used to. But could not find an option to let me select efi as a type.

Would someone please tell me what partitions do I need and how to create them from cmd r boot ?

I could spilt this into a few different questions each asking about a specific point but they will lead back to the overall question/request for info above.

Not sure if this is relevant or a different issue. Assume I go for the 2-patiction model.

My time machine show me 2 options from the drop list 1 for os and 1 for data. I choose a date and restored the os archive to the os participation.

That worked and it rebooted itself and went to recovery menu.

I then got to restore from tm, select the same date and restore the data to the destination of the data participation. It runs for while may be 10 - 15 mins then opens a dialog saying errors and reboots.

Ive tried this for several dates. As I say not sure if its all connected to the original question or not.

Thanks for any help Jeff.

Mac Catalina - Disk Recovery Partitioning - 2 or 1

I have a Mac, which was running Catalina. For some reason the disk corrupted itself and I needed to rebuild it.

I've done some googling and have also spoken with Apple Support, but got conflicting information.

I'm not a Mac expert, but do have a lot of experience working with OSs at low levels.

I also have many months' worth of Time Machine archives.

From memory, the disk had 2 partitions, one for the OS and one for data. This was confirmed by Apple Support. I can't find any info about this config on Google, which only mentions a single partition.

I'm used to the idea of an OS disk and data disk, that's how I structure my Linux boxes.

What I can't find are sizes and types. Apple Support could not tell me about those. I'm thinking that the OS partition should be small may be 240G (that works well for Linux) and the data uses the rest of the disk.

Disk Utilities in recovery (Cmd+R) basically lets me choose FAT, Ex-FAT and the normal Apple types. When I tried booting I got the white screen with the "no entry sign". I then booted using Cmd+R and ran Disk Repair. It mentioned EFI, which again I'm used to, but could not find an option to let me select EFI as a type.

Would someone please tell me what partitions I need and how to create them from a Cmd+R boot?

I could spilt this into a few different questions each asking about a specific point but they will lead back to the overall question/request for the info above.

Not sure if this is relevant or a different issue. Please assume I go for the 2-partition model.

My Time Machine shows me 2 options from the drop-down list, one for OS and one for data. I choose a date and restored the OS archive to the OS partition.

That worked and it rebooted itself and went to recovery menu.

I then got to restore from TM, selected the same date and restored the data to the destination of the data partition. It runs for a while, maybe 10 - 15 mins, then opens a dialog saying errors and reboots.

I've tried this for several dates. As I say, not sure if it's all connected to the original question or not.

Thanks for any help Jeff.

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asked Nov 16, 2022 at 8:03

Jeff Baker

Mac Catalina - Disk Recovery Paticioning - 2 or 1

I have a mac which was running Catalina. For some reason the disk corrupted itself and I need to rebuild it.

I've done some google and also spoken with apple support and get conflicting info.

I'm not a mac expert but do have a lot of experience working with os's at low levels.

I also have many months' worth of time machine archives.

From memory, the disk had 2 partitions. 1 for the os and 1 for data. This was confirmed by apple support. I cant find info about this config on google which only mentions a single partition.

I'm used to the idea of an os disk and data disk, that's how I structure my linux boxes.

What I cant find are sizes and types. Apple support did not know ???? I'm thinking the os partition should be small may be 240G ( that works well for linux).

The data uses the rest of the disk.

Would someone please tell me what partitions do I need and how to create them from cmd r boot ?

I could spilt this into a few different questions each asking about a specific point but they will lead back to the overall question/request for info above.

Not sure if this is relevant or a different issue. Assume I go for the 2-patiction model.

My time machine show me 2 options from the drop list 1 for os and 1 for data. I choose a date and restored the os archive to the os participation.

That worked and it rebooted itself and went to recovery menu.

Ive tried this for several dates. As I say not sure if its all connected to the original question or not.

Thanks for any help Jeff.