root@ubuntu:~# fdisk -l

Disk /dev/cciss/c0d0: 300.0 GB, 299966445568 bytes

255 heads, 63 sectors/track, 36468 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x000cbb89

DeviceBoot Start End Blocks Id System

/dev/cciss/c0d0p1 1 2432 19530752 83 Linux

/dev/cciss/c0d0p2 2432 3405 7812096 82 Linux swap / Solaris

/dev/cciss/c0d0p3 3405 27744 195507201 5 Extended

/dev/cciss/c0d0p5 3405 3429 194560 83 Linux

/dev/cciss/c0d0p6 3429 27744 195311616 83 Linux

root@ubuntu:~# hdparm -t/dev/cciss

/dev/cciss:

BLKGETSIZE failed: Inappropriate ioctl fordevice

BLKFLSBUF failed: Inappropriate ioctl for device

root@ubuntu:~# hdparm -t/dev/cciss/c0d0

/dev/cciss/c0d0:

Timing buffered disk reads: 550MB in 3.01 seconds = 182.76 MB/se

单个硬盘转速测试命令：

在linux下,可以查看硬盘的读写速度,比如 #hdparm -t /dev/hda 查看硬盘读写速度 最后可以看到 timing buffered disk reads:....... 开启DMA功能 hdparm -d 1 /dev/hda 开启DMA功能,可把它添加到/etc/rc.local文件中