His life____ two centuries. A: spanned B: executed C: associated D: an
His life____ two centuries. A: spanned B: executed C: associated D: an
He found a coin in his pocket and _____ her collecting tin. ( ) A: treated it to B: slipped it into C: spanned it with D: put it on
He found a coin in his pocket and _____ her collecting tin. ( ) A: treated it to B: slipped it into C: spanned it with D: put it on
【判断题】Throughout the 19th century, America concentrated on creating a nation that spanned the continent. For example, the 1903 Louisiana Purchase from France doubled the nation’s geographical area. ___ A.对 B.错 答
【判断题】Throughout the 19th century, America concentrated on creating a nation that spanned the continent. For example, the 1903 Louisiana Purchase from France doubled the nation’s geographical area. ___ A.对 B.错 答
Long days of work and no rest _____ the medical personnel who have been fighting against the virus and trying to save more patients’ lives. A: has strained out B: has stretched out C: has stressed out D: has spanned out
Long days of work and no rest _____ the medical personnel who have been fighting against the virus and trying to save more patients’ lives. A: has strained out B: has stretched out C: has stressed out D: has spanned out
Windows Server 2012中支持的动态卷类型包括: 简单卷(Simple Volume):与基本磁盘的分区类似,只是其空间可以扩展到非连续的空间上。 跨区卷(Spanned Volume):可以将多个磁盘(至少两个,最多32个)上的未分配空间,合成一个逻辑卷。使用时先写满一部分空间再写入下一部分空间。 带区卷(Striped Volume):又称条带卷RAID 0,将2-32个磁盘空间上容量相同的空间组合成一个卷,写入时将数据分成64K大小相同的数据块同时写入卷的每个磁盘成员的空间上。带区卷提供最好的磁盘访问性能,但是带区卷不能被扩展或镜像,并且不提供容错功能。 镜像卷(Mirrored Volume):又称RAID 1技术,是将两个磁盘上相同尺寸的空间建立为镜像,有容错功能,但空间利用率只有50%,实现成本相对较高。 带奇偶校验的带区卷:采用RAID 5技术,每个独立磁盘进行条带化分割、条带区奇偶校验,校验数据平均分布在每块硬盘上。容错性能好,应用广泛,需要三个以上磁盘。其平均实现成本低于镜像卷。
Windows Server 2012中支持的动态卷类型包括: 简单卷(Simple Volume):与基本磁盘的分区类似,只是其空间可以扩展到非连续的空间上。 跨区卷(Spanned Volume):可以将多个磁盘(至少两个,最多32个)上的未分配空间,合成一个逻辑卷。使用时先写满一部分空间再写入下一部分空间。 带区卷(Striped Volume):又称条带卷RAID 0,将2-32个磁盘空间上容量相同的空间组合成一个卷,写入时将数据分成64K大小相同的数据块同时写入卷的每个磁盘成员的空间上。带区卷提供最好的磁盘访问性能,但是带区卷不能被扩展或镜像,并且不提供容错功能。 镜像卷(Mirrored Volume):又称RAID 1技术,是将两个磁盘上相同尺寸的空间建立为镜像,有容错功能,但空间利用率只有50%,实现成本相对较高。 带奇偶校验的带区卷:采用RAID 5技术,每个独立磁盘进行条带化分割、条带区奇偶校验,校验数据平均分布在每块硬盘上。容错性能好,应用广泛,需要三个以上磁盘。其平均实现成本低于镜像卷。