host control block 主控制块
host control block table [计] 主控制程序块表
host interface block 主机接口块
host system message block 主系统消息块
block host computer 搭配式图
However, the software package block must reside on the source host.
然而，软件包块必须存在于源主机上。
At distribution time, the resources do not need to be collected from the source host; they are already contained in the software package block.
在发布的时候，源文件不需要从源主机上收集；它们已经包含在软件包的块里。
When a block is written to the active disk, a copy of the block is also written to the backup host.
当将一个数据块写入活动磁盘时，该数据块也将写入备用主机。
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