Linux hard disk detection

Linux hard disk detection badblocks function description: check the damaged blocks in the disk device. Syntax: badblocks [-svw] [-B & lt; block size & gt;] [-o & lt; output file & gt;] [disk device] [number of disk blocks] [start Block] Supplementary Note: the disk device to be checked must be specified when executing the command, and... linux hard disk detection badblocks function description: check the damaged blocks in the disk device. Syntax: badblocks [-svw] [-B <区块大小> ] [-O <输出文件> ] [Disk device] [number of disk blocks] [start Block] Supplementary Note: the disk device to be checked and the number of disk blocks of the device must be specified during command execution. Parameter:-B <区块大小> Disk block size, in bytes. -O <输出文件> Write the check result to the specified output file. -S shows the progress during the check. -V displays detailed information during execution. -W performs a write test during the check. [Disk device] specifies the disk device to be checked. [Number of disk blocks] total number of blocks of the specified disk device. [Start Block] specifies the block from which the check starts. Hdparm syntax: hdparm [-CfghiIqtTvyYZ] [- <快取分区> ] [-A <0 or 1>] [-c] [-d <0 or 1>] [-k <0 or 1>] [-K <0 or 1>] [-m <分区数> ] [-N <0 or 1>] [-p] [-P <分区数> ] [-R <0 or 1>] [-S <时间> ] [-U <0 or 1>] [-W <0 or 1>] [-X <传输模式> ] [Device] Note: hdparm can be detected to display and set parameters of the IDE or SCSI hard disk. Hdparm-t/dev/hda (IDE hard disk) hdparm-t/dev/sda (SATA, SCSI, hard RAID card array) hdparm-t/dev/md0 (soft RAID device) test results should be greater than 40 MB/s under no-load conditions, and equal to 20 MB/s under load conditions should be normal, if the test result is extremely low, you need to use a dedicated hard disk detection tool to test whether the disk is faulty. Fsck checks the file system and tries to fix the error. Syntax: fsck [-aANPrRsTV] [-t <文件系统类型> ] [File system...] Supplementary Note: When a file system error occurs, you can use the fsck command to try to fix it. Parameter:-a automatically fixes the file system and does not ask any questions. -A checks all file systems listed in the file according to the/etc/fstab configuration file. -N: if no command is executed, only the actions that will be performed are listed. -P checks all file systems at the same time when used with the "-A" parameter. -R uses the interactive mode to ask questions when performing repair, so that users can confirm and determine the handling method. -R when used with the "-A" parameter, the file system that skips the/directory is not checked. -S executes the check job in sequence rather than simultaneously. -T <文件系统类型> Specifies the file system type to be checked. -T when the fsck command is executed, the title information is not displayed. -V shows the command execution process.