hdparm常用参数使用举例:
1、显示硬盘的相关设置:
[root@oracle ~]# hdparm /dev/sda
/dev/sda:
IO_support = 0 (default 16-bit)
readonly = 0 (off)
readahead = 256 (on)
geometry = 19929[柱面数]/255[磁头数]/63[扇区数], sectors = 320173056[总扇区数], start = 0[起始扇区数]
2、显示硬盘的柱面、磁头、扇区数:
[root@oracle ~]# hdparm -g /dev/sda
/dev/sda:
geometry = 19929[柱面数]/255[磁头数]/63[扇区数], sectors = 320173056[总扇区数], start = 0[起始扇区数]
3、测试硬盘的读取速度:
[root@oracle ~]# hdparm -t /dev/xvda
/dev/xvda:
Timing buffered disk reads: 422 MB in 3.01 seconds = 140.20 MB/sec
[root@oracle ~]# hdparm -t /dev/xvda
/dev/xvda:
Timing buffered disk reads: 408 MB in 3.01 seconds = 135.59 MB/sec
[root@oracle ~]# hdparm -t /dev/xvda
/dev/xvda:
Timing buffered disk reads: 416 MB in 3.01 seconds = 138.24 MB/sec
4、测试硬盘缓存的读取速度:
[root@oracle ~]# hdparm -T /dev/xvda
/dev/xvda:
Timing cached reads: 11154 MB in 1.98 seconds = 5633.44 MB/sec
[root@oracle ~]# hdparm -T /dev/xvda
/dev/xvda:
Timing cached reads: 10064 MB in 1.98 seconds = 5077.92 MB/sec
[root@oracle ~]# hdparm -T /dev/xvda
/dev/xvda:
Timing cached reads: 10600 MB in 1.98 seconds = 5351.73 MB/sec
5、检测硬盘的电源管理模式:
[root@oracle ~]# hdparm -C /dev/sda
/dev/sda:
drive state is: standby [省电模式]
6、查询并设置硬盘多重扇区存取的扇区数,以增进硬盘的存取效率:
[root@oracle ~]# hdparm -m /dev/sda
[root@oracle ~]# hdparm -m 参数值为整数值如8 /dev/sda
附:硬盘坏道修复方法
检查:smartctl -l selftest /dev/sda
卸载:umount /dev/sda*
修复:badblocks /dev/sda