Linux下用hdparm测试磁盘性能遇到“Inappropriate ioctl for device”错误

1) 工具描述

hdparm是用来测试硬盘读性能的常用工具. 系统自带的hdparm版本比较老, 在某些服务器里(如HP Proliant系列)执行会有如下错误:

"HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate ioctl for device".

查看系统自带hdparm命令的版本:

# hdparm -V

hdparm v5.7

# which hdparm

/sbin/hdparm

2) 下载安装

下载地址: http://sourceforge.net/projects/hdparm/files/

# cd /orahome/wangnc/os

# rz (二进制上传新版文件hdparm-9.9.tar.gz)

# tar zxvf hdparm-9.9.tar.gz

# cd hdparm-9.9

# make

# make install

3) 使用示例

系统自带旧版本会有如下错误提示:

# hdparm -V

hdparm v5.7

# hdparm -tT /dev/cciss/c0d1p3

/dev/cciss/c0d1p3:

Timing cached reads: 11484 MB in 2.00 seconds = 5745.75 MB/sec

HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate ioctl for device

Timing buffered disk reads: 122 MB in 3.07 seconds = 39.72 MB/sec

HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate ioctl for device

使用新版本后不会有错误提示了:

# hdparm -V

hdparm v9.9

# hdparm -tT /dev/cciss/c0d1p3

/dev/cciss/c0d1p3:

Timing cached reads: 5724 MB in 2.00 seconds = 2863.87 MB/sec

Timing buffered disk reads: 194 MB in 3.01 seconds = 64.48 MB/sec

其中两参数含义:

-T perform cache read timings显示了不存取磁盘直接从Linux缓存读取数据的速度. 这项测量实际上标示了被测系统的处理器,缓存和内存的吞吐量.

-t perform device read timings显示了不使用预先的数据缓冲, 标示了Linux下没有任何文件系统开销时磁盘可以支持多快的连续数据读取.

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