hdparm - is used to handle disk devices and hard disks. it get statistics
about the hard disk, alter writing intervals, acoustic management, and DMA
settings
To display information of the hard drive
$ sudo hdparm -I /dev/sda
To display all the options
$ sudo hdparm -h
To test hard disk drive speed
$ sudo hdparm -t /dev/sdb
To measure hard disk cache read speed
$ sudo hdparm -T /dev/sdb
To get current settings
$ sudo hdparm -d /dev/sdb
To set DMA on for a device
$ sudo hdparm -d1 /dev/sdb
To print all settings
$ sudo hdparm -v /dev/sda
regards,
T.Dhanasekar