Managing the copying of writes from primary storages to secondary storages across different networks

A system in communication with a first group of at least one primary storage, at least one primary device managing Input/Output (I/O) access to the at least one primary storage, and at least one corresponding secondary storage to which writes to the at least one primary storage are copied and a second group of at least one primary storage, at least one primary device managing Input/Output (I/O) access to the at least one primary storage, and at least one corresponding secondary storage to which writes to the at least one primary storage are copied, comprising:

• a computer readable medium including information on the first group and the second group;
• a processor;
• a control program executed by the processor to cause operations, the operations comprising:
• receiving a failure notification from one of the primary devices in the first or second group of a failure to copy a write from the primary device to the secondary device;
• issuing a freeze command over a first network, using a first network protocol, to the at least one primary device in the first group to stop copying writes to the corresponding at least one secondary device;
• and
• issuing a freeze command over a second network, using a second network protocol, to the at least one primary device in the second group to stop copying writes to the corresponding at least one secondary device.

An article of manufacture including code enabled to communicate with a first group of at least one primary storage, at least one primary device managing Input/Output (I/O) access to the at least one primary storage, and at least one corresponding secondary storage to which writes to the at least one primary storage are copied and a second group of at least one primary storage, at least one primary device managing Input/Output (I/O) access to the at least one primary storage, and at least one corresponding secondary storage to which writes to the at least one primary storage are copied method and enabled to cause operations, the operations comprising:

• maintaining information on the first and second groups;
• receiving a failure notification from one of the primary devices in the first or second group of a failure to copy a write from the primary device to the secondary device;
• issuing a freeze command over a first network, using a first network protocol, to the at least one primary device in the first group to stop copying writes to the corresponding at least one secondary device;
• and
• issuing a freeze command over a second network, using a second network protocol, to the at least one primary device in the second group to stop copying writes to the corresponding at least one secondary device.