HELP!!! MASSIVE ACL Corruption

I seemed to have made a colossal error in setting up my iMac.

I have divided the internal HDD into two partitions: P1=OS X 10.10.5, P2=OS X 10.7.5. All updates applied

Here is were I think I went wrong:

I installed OS X Server 5 on the Yosemite partition, AND OS X Server Lion on the Lion Partition. I did this so I could do testing with Server on both systems.

Everything was working fine and I was able to switch back and forth between the two partitions, testing various settings, including VPN.

However, last week, after doing some work in Lion, when I restarted into Yosemite, I was besieged with ACL errors, and "can not access Library" messages.

I ran Disk Utility and it seems EVERY file on the system had "Unexpected ACL" error. Clicking "Repair" did nothing to resolve the problem.

Displaying info on any file showed multiple redundant Sharing and Permissions entries, ALL of which are set to Privilege=Read Only.

I have tried to delete and/or change the privileges manually, but I am not able to modify the privileges even after entering my admin id and password.

I tried to use terminal to delete the ACLs (while in 10.10), but that failed (I can not seem to get the syntax correct).

I figured the problem probably occurred when I was in the Lion partition, so I tried to restart into Lion, and Lion is completely locked now as well. Restart is stuck on the grey screen with the spinning wheel (for 3 days).

Then I tried to restart into Yosemite, and it is stuck as well on the grey screen and spinning wheel.

I would like to try deleting the ACLs again by using Terminal after restarting into the 10.10 recovery partition, but need help with the syntax for removing the ACL from the partition.

i.e.

The Yosemite drive name is "iMac 27 HD"

After launching Terminal I would enter the commands

1. cd /volumes/"iMac 27 HD"
2. chmod -N -R "iMac 27 HD"

Will this successfully remove the ACL parameters for all files on the partition?

I have attached a link to a capture of "ls -el" and "ls -al" commands on the partition, if it helps with the diagnosis:

https://www.dropbox.com/sc/lzrlmb4ttmq9gux/AADR8wsWQNqFoOtF8elTJZUva

Any help, suggestions or cautions would be greatly appreciated

TIA

BTW - As a last resort, I tried to reinstall Yosemite, but the installer will not function either. I am hoping that if I can remove the ACLs I can complete the reinstall.