嘻嘻哈哈的部落格(blog)

[root@ftp]# time dd if=/dev/zero bs=10M of=b count=100
100+0 records in
100+0 records out
real 0m1.655s
user 0m0.003s
sys 0m1.653s
[root@ftp]# time cat b > /dev/null
real 0m0.788s
user 0m0.105s
sys 0m0.683s
[root@ftp]# hdparm -Tt /dev/sdb

/dev/sdb:
Timing cached reads: 3596 MB in 2.00 seconds = 1796.48 MB/sec
Timing buffered disk reads: 126 MB in 3.01 seconds = 41.80 MB/sec

由第一dd测试，是否可以认为写速度：10×100/1.655 = 604MB/s
第二个测试，读速度：10×100/0.788 = 1269MB/s

Tags: dd, disk, hdparm, io, 性能, 测试, 硬盘 //