Method, device, data storage system, and computer product for error injection

An electronic device, comprising:

• a processor;
• and
• a memory coupled to the processor and storing instructions for execution, the instructions, when executed by the processor, causing the electronic device to perform acts comprising:
• while a data storage system is in an error injection mode, injecting information representing an error of a storage device array of the data storage system into a first switch of the data storage system, such that the information representing the error is passed from a first downstream port of the first switch, through a second switch of the data storage system, to a computing device connected with the second switch, the first switch and the second switch being connected to the storage device array via respective downstream ports, and the first downstream port being connected to a second downstream port of the second switch in the error injection mode;
• and
• determining error handling capability of the data storage system by obtaining a handling result of the information representing the error from the computing device.

A data storage system, comprising:

• a storage device array;
• a computing device;
• and
• a first switch and a second switch being connected to the storage device array via respective downstream ports, the second switch being connected to the computing device via upstream ports,
• wherein, in an error injection mode of the data storage system, the first switch is injected with information representing an error of the storage device array of the data storage system, a first downstream port of the first switch and a second downstream port of the second switch being connected such that the information representing the error is passed from the first switch to the second switch, which in turn passes the information representing the error to the computing device.