磁盘使用率是否最高？

如何top在Shell中唯一合适的系统中实时跟踪磁盘使用情况（写/读和其他有趣的东西）？

如果它可以监视特定目录，那就太好了。

有一个工具（顶部类似）来跟踪I / O：

iotop -oPa

$ apt-cache show iotop
(...)
Description-en: simple top-like I/O monitor
 iotop does for I/O usage what top(1) does for CPU usage. It watches I/O
 usage information output by the Linux kernel and displays a table of
 current I/O usage by processes on the system. It is handy for answering
 the question "Why is the disk churning so much?".
 .
 iotop can only run under a Linux 2.6.20 or later kernel built with the
 CONFIG_TASKSTATS, CONFIG_TASK_DELAY_ACCT, CONFIG_TASK_IO_ACCOUNTING and
 CONFIG_VM_EVENT_COUNTERS build config options on.
Homepage: http://guichaz.free.fr/iotop/