单选题Which of the following problems has occurred when a message appears on the system console indicating that a dump must be copied to external media? （）A The external dump device is full. B The dump device was not mirrored before the dump happened. C The boot failed while copying the dump from paging space to a file. D The dump device was not set to a paging device before the dump happened.
单选题
Which of the following problems has occurred when a message appears on the system console indicating that a dump must be copied to external media? （）
A
The external dump device is full.
B
The dump device was not mirrored before the dump happened.
C
The boot failed while copying the dump from paging space to a file.
D
The dump device was not set to a paging device before the dump happened.
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