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单项选择题

During reboot， the system hangs with an LED 0554 message that means， "The boot device could not be opened or a read failed." 
Which of the following recovery procedures should be taken （）

A.Boot in maintenance mode and use fsck to check hd5.
B.Boot in maintenance mode， access the rootvg and check the /etc/inittab for corruption.
C.Boot in maintenance mode， access the rootvg and rebuild the boot image using the bosboot command.
D.Boot in maintenance mode， and reset the root password.

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