Information processing apparatus

An information processing apparatus comprising:

• a casing which includes a side plate on each of left and right sides;
• and
• a processing apparatus to be mounted in the casing,
• the processing apparatus includes:
• a board on which an arithmetic processing device and a storage device are mounted;
• a rail which is provided on each of the left and right sides of the board and extends in the horizontal direction to make the board slidable;
• a locking portion which locks the board to the casing;
• a detection portion which detects that the board is taken out first when the board is taken out from the casing by that locking by the locking portion is released and the board slides against the rails;
• and
• a locking mechanism provided so as to be separated physically from the locking portion and configured to lock the board to the casing when the board is further taken out from the casing after the board is taken out first,
• the processing apparatus migrates a virtual machine which operates by using the arithmetic processing device and the storage device to another processing apparatus while the board is locked to the casing by the locking mechanism.