Link to other thread: Disks with exported pools, cannot import; 1000 offline uncorrectable sectors on HDD
If the pool(s) are mounted read only, you would have to copy the data elsewhere. You need to let us know what options you may have. Do you have enough spare disks to create a new pool and copy the data over in the same computer? Do you have to do it over SMB to a different computer? We would only be guessing without knowing your available resources.