【摘 要】
：
系统“锁死”问题 磁带机在不同的使用时间和场合,不可能从开始加上电一直到主机系统运行结束才关电,特别是在实时系统中应该允许磁带机随时联机或者脱机。可是,目前常常因
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系统“锁死”问题 磁带机在不同的使用时间和场合,不可能从开始加上电一直到主机系统运行结束才关电,特别是在实时系统中应该允许磁带机随时联机或者脱机。可是,目前常常因为此举而酿成很多恶果。例如,正在工作的穿孔机发生错码错排,或者处于待命工作的其他外部设备发生误启动,更有甚者,当开启或关闭磁带机的
System “deadlock” problem Tape in different use of time and occasion, it is impossible to power from the beginning until the end of the host system is powered off, especially in real-time system should allow the tape machine at any time online or offline. However, at present, many evil consequences are often caused by this move. For example, a mismatched misplacement occurs in a working punch, or a mis-start occurs on other external devices on standby, or worse, when the tape drive is turned on or off
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