That emergency maintenancespace is there so it can be used to recover from an overfull disk.
有了这个紧急维护空间，就可以利用它对一块已满的磁盘进行恢复。
2
The parts also need maintenance, security, space, etc., and if the business needs change enough, the parts have to be scrapped.
这些部件需要维护、保护、空间等，如果商业需求的改变超过一定程度，这些部件就要被丢弃。
3
This figure accurately reflects the proportions of it mass as it relates to cost, physical space requirements, maintenance, administration, management oversight, and obsolescence.