The problem of C7 is not a big problem. It is no problem to change a better SATA cable as long as it does not continue to increase.
The warning of C4 indicates that the number of times the problem sector is automatically mapped to the spare sector is 441;
If C5 has a count, it means that the sector has an error when reading. If the error still exists when writing data to the sector next time, the address of the sector will be remapped to the spare good sector location, and the bad sector will not be used again.
At this time, (05) the count of "remapped sectors" will increase, and (C5) the count will be zero. If there are no errors when writing data to this sector next time, the operation to be mapped will be cancelled, and the count of (C5) will naturally return to zero. Because only one reading error is not enough to explain the sector damage, remapping will not happen, but will be included in the observation range;
Therefore, (C5) this situation does not need any operation, but also wait and see the future development;
05 indicates that your hard disk has 685 problem sectors mapped to spare sectors, and there is no problem at present, but when the threshold reaches single digits at 05, the hard disk is basically reimbursed. If it is a warranty at present, it can be replaced.