disk utility – Set up a Second Copy of Home windows 10 on iMac 2019 (macOS Monterey, no T2 chip)

I first discovered this website at Is it potential to put in 2 home windows below 1 mac? and adopted from there to Find out how to set up Home windows 10 right into a 2013 iMac with out utilizing the Boot Camp Assistant, USB flash drive or third occasion instruments?, however my Mac has a Machine Block Dimension of 4096 Bytes and I am undecided which numbers within the responses to the opposite two questions have to be adjusted.

It is in all probability price noting I’m completely effective with reformatting my iMac’s inner drive and re-installing macOS and the primary copy of Home windows 10 if that must be wanted or would simplify issues. I simply did so a couple of days in the past when makes an attempt to put in Home windows 10 to my exterior SSD did not go effectively, so it isn’t precisely a loss.

This Mac doesn’t have the T2 safety chip if that makes a distinction.

I’ve a 1TB inner drive with three ~333GB partitions and have already put in Home windows 10 with Boot Camp on considered one of them. I wish to use the third partition, for now simply named “WINDOWS”, for the second set up:

andrew@Andrews-iMac ~ % diskutil record
/dev/disk0 (inner, bodily):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *1.0 TB     disk0
   1:                        EFI ⁨EFI⁩                     314.6 MB   disk0s1
   2:                 Apple_APFS ⁨Container disk1⁩         334.0 GB   disk0s2
   3:                  Apple_HFS ⁨WINDOWS⁩                 332.9 GB   disk0s3
   4:       Microsoft Primary Information ⁨BOOTCAMP⁩                333.2 GB   disk0s4

/dev/disk1 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +334.0 GB   disk1
                                 Bodily Retailer disk0s2
   1:                APFS Quantity ⁨Andrew's iMac - Information⁩    35.6 GB    disk1s1
   2:                APFS Quantity ⁨Preboot⁩                 303.0 MB   disk1s2
   3:                APFS Quantity ⁨Restoration⁩                1.1 GB     disk1s3
   4:                APFS Quantity ⁨VM⁩                      5.4 GB     disk1s4
   5:                APFS Quantity ⁨Andrew's iMac⁩           15.2 GB    disk1s5
   6:              APFS Snapshot ⁨com.apple.os.update-...⁩ 15.2 GB    disk1s5s1

That is what I get for Block Dimension:

    andrew@Andrews-iMac ~ % diskutil data WINDOWS | grep "Block Dimension"
   Machine Block Dimension:         4096 Bytes
   Allocation Block Dimension:     131072 Bytes

I attempted utilizing the diskutil command from the opposite directions:

andrew@Andrews-iMac ~ % diskutil  resizevolume  disk0s3  150G  3  "Free House"  "dummy"  224800M  FAT32  "WINSTALL"  10G  %DE94BBA4-06D1-4D40-A16A-BFD50179D6AC%  %noformat%  600M

however I solely acquired an error:

Resizing to 150000000000 bytes and including 3 partitions
Began partitioning on disk0s3 (WINDOWS)
Error: -69519: The goal disk is simply too small for this operation, or a spot is required in your partition map which is lacking or too small, which is usually attributable to an try and develop a partition past the start of one other partition or past the tip of partition map usable house

Then I attempted altering the block dimension however bought a “permission denied” error:

andrew@Andrews-iMac ~ % newfs_exfat -R -v WINDOWS -b 512 /dev/disk0s3
newfs_exfat: /dev/disk0s3: Permission denied

Any assistance is tremendously appreciated. Thanks.