一个关于lvm和luks的问题

[Qijiang Fan <fqj1994@gmail.com>]

大家好，

# hdparm -t /dev/sda
/dev/sda: Timing buffered disk reads: 342 MB in  3.02 seconds = 113.42
MB/sec# hdparm -t /dev/mapper/sda5_crypt
/dev/mapper/sda5_crypt: Timing buffered disk reads: 338 MB in  3.00
seconds = 112.51 MB/sec# hdparm -t /dev/mapper/fqj1994--laptop-root
/dev/mapper/fqj1994--laptop-root: Timing buffered disk reads: 208 MB
in  3.01 seconds =  69.13 MB/sec
请问上面这个测试结果（多次）是说明对读速度造成影响最重的是lvm还是luks？
（注：只有一个硬盘）


谢谢