Shulou(Shulou.com)06/01 Report--

Today, I would like to share with you the relevant knowledge of how to use the Linux hdparm command. The content is detailed and the logic is clear. I believe most people still know too much about this knowledge, so share this article for your reference. I hope you can get something after reading this article. Let's take a look at it.

The Linux common command hdparm command provides a command line interface for reading and setting IDE or SCSI hard disk parameters.

Hdparm display and set the parameters of hard disk

Syntax hdparm (option) (parameter) option-a: set the number of partitions that are pre-stored in the block when reading the file, and if no option is added, the current setting is displayed;-A: turn on or off the cache function when reading the file;-c: set the IDE32 bit IUnip O mode;-C: detect the power management mode of the IDE hard disk;-d: set the DMA mode of the disk -f: write the data of the memory buffer to the hard disk and clear the buffer;-g: display the hard disk track, head, sector and other parameters;-h: display help;-I: display the hardware specification information of the hard disk, which is provided by the hard disk itself at boot;-I: directly read the hardware specification information provided by the hard disk;-k: keep the setting of the-dmu parameter when resetting the hard disk. -K: leave the setting of the-APSWXZ parameter when resetting the hard disk;-m: set the number of partitions accessed by multiple partitions of the hard disk;-n: ignore errors that occur when the hard disk is written;-p: set the PIO mode of the hard disk;-P: set the number of partitions cached inside the hard disk;-Q: no information is displayed on the screen when performing subsequent parameters;-r: set the read and write mode of the hard disk -S: set the wait time before the hard disk enters the power-saving mode;-t; evaluate the reading efficiency of the hard disk;-T: read efficiency of the Pinggu hard disk cache;-u: allow other interrupt requirements to be executed simultaneously when accessing the hard disk;-v: display the relevant settings of the hard disk;-w: set the write cache of the hard disk;-X: set the transfer mode of the hard disk;-y: put the IDE hard disk into power-saving mode. -Y: put the IDE hard drive into sleep mode;-Z: turn off the automatic power saving feature of some Seagate hard drives. Parameter device file: specify the device file name corresponding to the id driver.

An example displays the relevant settings of the hard disk:

Hdparm / dev/sda / dev/sda: IO_support = 0 (default 16-bit) readonly = 0 (off) readahead = 256 (on) geometry = 19457 [number of cylinders] / 255 [number of heads] / 63 [number of sectors], sectors = 312581808 [total number of sectors], start = 0 [number of starting sectors] ````shell displays the number of cylinders, heads and sectors of the hard disk: ```shell hdparm-g / dev/sda / dev/sda: geometry = 19457 [number of cylinders] / 255[ number of heads] / 63 [number of sectors] Sectors = 312581808 [total sectors], start = 0 [starting sectors] to test the read speed of the hard disk:

Hdparm-T / dev/sda / dev/sda: Timing cached reads: 4684 MB in 2.00 seconds = 2342.92 MB/sec Test the read speed of the hard disk cache:

Hdparm-T / dev/xvda / dev/xvda: Timing cached reads: 11154 MB in 1.98 seconds = 5633.44 MB/sec detect the power management mode of the hard drive:

Hdparm-C / dev/sda / dev/sda: drive state is: standby [Power Saving Mode] queries and sets the number of sectors for multiple sector access of the hard disk to improve the access efficiency of the hard disk:

Hdparm-m / dev/sda hdparm-m # parameter value is an integer value such as 8 / dev/sda attached: hard disk bad track repair method

Check: smartctl-l selftest / dev/sda uninstall: umount / dev/sda* repair: badblocks / dev/sda above is all the content of this article "how to use Linux hdparm commands". Thank you for reading! I believe you will gain a lot after reading this article. The editor will update different knowledge for you every day. If you want to learn more knowledge, please pay attention to the industry information channel.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.