Storage data copies with differing compression algorithms

A computer implemented method for managing a storage system, said storage system comprising a first storage device and a second storage device, said method comprising:

• analyzing a set of compression ratios used for a set of storage blocks written on said first storage device and said second storage device to determine a pattern;
• determining a first compression ratio and a second compression ratio in response to said pattern, wherein said first compression ratio is different from said second compression ratio;
• writing a storage block to said first storage device with said first compression ratio;
• and
• writing said storage block to said second storage device with said second compression ratio.

A computer program product for managing a storage array in a storage system, said computer program product comprising:

• a computer readable storage medium readable by a processing circuit and storing instructions for execution by said processing circuit for performing a method, said method comprising:
• analyzing a set of compression ratios used for a set of storage blocks written on said first storage device and said second storage device to determine a pattern;
• in response to said pattern, determining a first compression ratio and a second compression ratio, said first compression ratio being different from said second compression ratio;
• and
• writing a storage block to said first storage device with said first compression ratio and writing said storage block to said second storage device with said second compression ratio.