Lines Matching refs:disk

11 Laptop mode is used to minimize the time that the hard disk needs to be spun up,
82 configuration options. When the knob is set, any physical disk I/O (that might
83 have caused the hard disk to spin up) causes Linux to flush all dirty blocks. The
84 result of this is that after a disk has spun down, it will not be spun up
87 knob determines the time between the occurrence of disk I/O and when the flush
94 dirtied are not forced to be written to disk as often. The control script also
98 this results in concentration of disk activity in a small time interval which
99 occurs only once every 10 minutes, or whenever the disk is forced to spin up by
100 a cache miss. The disk can then be spun down in the periods of inactivity.
102 If you want to find out which process caused the disk to spin up, you can
104 is set, Linux reports all disk read and write operations that take place, and
105 all block dirtyings done to files. This makes it possible to debug why a disk
110 the output of block_dump will be logged, causing disk activity that is not
148 readahead can prevent disk accesses for things like executable pages (which are
202 * You can spin down the disk while playing MP3, by setting disk readahead
203   to 8MB (READAHEAD=16384). Effectively, the disk will read a complete MP3 at
213   file after every logging. When you're using laptop-mode and your disk doesn't
246 # Read-ahead, in 512-byte sectors. You can spin down the disk while playing MP3/OGG
247 # by setting the disk readahead to 8MB (READAHEAD=16384). Effectively, the disk
781 Bartek Kania submitted this, it can be used to measure how much time your disk