<1>使用hdparm检查硬盘/硬盘缓存的读写速度
[root@sqj ~]# hdparm -t /dev/vda
/dev/vda:
Timing buffered disk reads: 416 MB in 3.00 seconds = 138.55 MB/sec
[root@sqj ~]# hdparm -T /dev/vda
/dev/vda:
Timing cached reads: 10120 MB in 1.99 seconds = 5075.91 MB/sec
<2>使用dd命令测试硬盘的读写速度
[root@sqj ~]# dd if=/dev/zero bs=1024 count=10000 of=/root/test
10000+0 records in
10000+0 records out
10240000 bytes (10 MB) copied, 0.0803855 s, 127 MB/s
[root@sqj ~]# dd if=/root/test bs=64k | dd of=/dev/null
156+1 records in
156+1 records out
10240000 bytes (10 MB) copied, 0.189066 s, 54.2 MB/s
20000+0 records in
20000+0 records out
10240000 bytes (10 MB) copied, 0.188698 s, 54.3 MB/s