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Monitor hard disk status with smartd in CentOS

running program. smartmontools is not a Linux patent and supports systems such as BSD and Solaris.Install smartmontools Install CentOS/Fedora:# Yum install kernel-utils Install it in Debian/Ubuntu:# Apt-get install smartmontools Use smartmontools Before testing with smartmontools, check whether the hard disk has the SMART features:# Smartctl-I/dev/sda === Start of information section ==== Device Model: SEAGATE ST32500NSSUN250G 0741B58YP8 Serial Number: 5QE58YP8 Firmware Version: 3.AZK User Cap

Check whether the SSD is used in CentOS.

I am preparing for the test recently. I need to check which machines are attached with ssd hard disks. I saw many methods in a circle on Google, but they are all in the fog and I don't know how to determine them. Ssd disks seem to use scsi interfaces, so they cannot be determined based on the drive letter name. At last, eric told the lsscsi tool in the group that it was very simple and displayed directly. Not to mention nonsense. I have been preparing for the test recently. I need to check which

Sync requests and asynchronous requests for ASIHTTPRequest in iOS

1. First join the ASI Open Source Library2.WebImageView.h#import #import "ASIHTTPRequest.h"@interface Webimageview: Uiimageview asihttprequestdelegate> -(void) Setimageurl: (nsurl *) URL;@endwebimageview.m#import "WebImageView.h"#import"ASIHTTPRequest.h"@implementation Webimageview-(ID) initWithFrame: (cgrect) frame{ self = [superinitwithframe: frame];if (self) { //initialization code} returnself;}-(void) Setimageurl: (nsurl *) url{ // sync request //[self Synchronous:url]; // asynchronous Requ

Universal WinXP Image File Creation Guide

is to change the ide ata/ATAPI controller. This step is very important because we know that the drivers of the ide ata/ATAPI controller vary greatly with different motherboard types, such as Intel, Nforce 2, and, it cannot be used at all! ① In the Device Manager Console window, right-click the ide ata/ATAPI Controller, Intel (r) 82371 AB/EB Bus Master IDE Contro

How to find the E1 interface in Cisco 3925

I haven't written IT for a long time and have been busy recently. IT migrant workers often encounter some simple problems during project implementation. Today I will share two cases: CISCO3925 and CISCO2901, both devices were powered on after the device arrived the week before, but the problem was solved. Today we briefly describe it. Recently, two financial institutions have purchased two 3925 routers and two 2901 routers. After the arrival, I went to the site for Equipment Acceptance. After al

Enable your parallel hard drive to work under the UltraDMA100 and UltraDMA133

133) Such as my computer: [Root @ l ~] # Uname- Linux l. myhome 2.6.9 Thu Feb 8 00:18:10 CST 2007 i686 i686 i386 GNU/Linux [Root @ l ~] # Hdparm-d1X69-m16-c3-k1/dev/hda /Dev/hda: Setting 32-bit IO_support flag to 3 Setting multcount to 16 Setting using_dma to 1 (on) Setting keep_settings to 1 (on) Setting xfermode to 69 (UltraDMA mode5) Multcount = 16 (on) IO_support = 3 (32-bit w/sync) Using_dma = 1 (on) Keepsettings = 1 (on) [Root @ l ~] # Hdparm-I/dev/hda /Dev/hda: Model = Maxtor 5T030

Bootkit hard drive Forensics-lecture 1

According to my previous article, we already know that Hard Disk Filters often obtain permissions by means of hooks. This method uses the IRP_MJ_SCSI routine in the microport driver. Other ideas are that this hook sub-method may be using StartIO routines in windows driver development. However, in any case, these routines can only be used in driver modules of earlier versions, and these drivers cannot be obtained in windows Vista or later versions. All driver modules use either the SCSI interfac

Oracle uses WITHAS and HINTMATERIALIZE to optimize SQL statements to reduce FILTER efficiency

. USERNAME NOT IN(Select au. USERNAMEFROM ALL_USERS AUInner join DBA_USERS DEVOn au. USERNAME = DEV. USERNAMEInner join (SELECT OWNER AS USERNAMEFROM ALL_TABLES TWhere t. LAST_ANALYZED = TRUNC (SYSDATE) ATAOn au. USERNAME = ATA. USERNAME) OR(PA. SDATE IS NOT NULL ANDAU. USERNAME IN(Select au. USERNAMEFROM ALL_USERS AUInner join DBA_USERS PAOn au. USERNAME = PA. USERNAMEInner join ALL_TABLES ATAOn pa. USERNAME = AT

Determine if two IPs belong to the same subnet

Testoj {public static void main (string[] args) {Scanner in = new Scan NER (system.in);//string input = In.nextline (); string[] data = new String[3];d ata[0] = in.nextline ();d ata[1] = in.nextline ();d ata[2] = In.nextline (); if (data.length!=3) {System.out.println ("1"); return;} string[] Masks = data[0].split ("\ \"); string[] ips = data[1].split ("\ \"); s

Interpreting the process of request and response in the YII framework of PHP, YII framework _php Tutorial

overwritten. $headers->add (' Pragma ', ' no-cache ');//Set a PRAGMA header. Any existing Pragma header will be discarded $headers->set (' Pragma ', ' no-cache ');// Delete the Pragma header and return the value of the deleted Pragma header to the array $values = $headers->remove (' Pragma '); Supplement: Header name is case sensitive, the newly registered header information before the Yii\web\response::send () method call is not sent to the user. 3. Response body Most of the responses should h

How can I install Windows XP Professional SP3 on ThinkPad x61? (NB) (ThinkPad) (x61) (OS) (Windows)

earlier than the time ), some Hardware Products built in x61 are not exactly the same (such as non-existent network cards... ), this article is based on the version of the tpuser webmaster, and has been updated in Windows xp pro SP3. As for the driver version, I have not used the latest version, but have used it for more than half a year. It is determined to be the latest version. In this document, the security mode is available in x61 be8. For other x61 hosts, consider the entire method.

The way of Big Data processing (MATLAB article)

One: Cause(1) Recently has been dealing with big data, from MB----> GB changes, is a qualitative leap, the corresponding tools are also changing from widows to Linux, from single-machine to Hadoop multi-node computing(2) The problem is, in the face of huge amounts of data, how to tap into practical information or to find potential phenomena, visual tools may be essential;(3) Visualization tool can say Baidu a big article, but as the researcher of us, the program ape we may want to be able to abs

Blue Screen Code stop:0x000000ea (0x85e286b8,0x8635f210,0xf7a53cbc,0x00000001)

, 0x000000ea:thread_stuck_in_device_driverError analysis: usually caused by a video card or video driver.◇ Solution: Upgrade the latest graphics driver first, if not, you need to replace the video card test failure is still occurring.33, 0x000000ed:unmountable_boot_volumeError analysis: Usually due to a disk error, it is sometimes recommended to check the hard drive connection is not in contact with, or do not use the cable that meets the drive specifications, such as

Related matrix operations in OpenCV

mechanismsi.rows (0). Setto (Scalar (0));//clear the first line 0Saturate_cast (...); /can ensure that the content is 0~255 integermat::total (); Returns the total number of elementssize_t mat::elemsize (); Returns the size of the element: Cv_16sc3-->3*sizeof (short)-->6size_t mat::elemsize1 (); Returns the element size of one channel cv_16sc3-->sizeof (short)-->2int Mat::type () returns his type CV_16SC3 and the likeint Mat::d epth () return Depth: cv_16sc3-->cv_16sint Mat::channels () returns

Pig UDF User Custom function

Register UDFThe contents of Do.pig are as follows:Register/xx/yy.jardata = Load ' data '; result = foreach data generate Aa.bb.Upper ($);d UMP result;  The path of the register can be either a local path or an HDFS pathRegister Hdfs://pig/xx/yy.jar  If it's pig-d,udf.import.list=AA.BB, you can not use the package path when referencing UDFs:Register/xx/yy.jardata = Load ' data '; result = foreach data generate Upper ($);d UMP result;  If it's pig-d,Pig.additional.jars=/xx/yy.jar, can not register

In-depth analysis of the notebook Structure

interfaces and corresponding peripheral devices: PCI bus, IDE devices (optical drive and hard drive), sound card, Nic, and USB. 8. IDE interfaces and IDE Devices The ICH4-M provides two independent IDE signal channels, each supporting two IDE devices, with 16 Mb/s pio ide transmission or Ultra ATA 100/66/33 transmission, each IDE device has an independent clock. IDE devices are hard drives and optical drives.Nowadays, an IDE interface technology nam

Reading Notes Building embedded linux system Chapter 3 hardware support

data acquisition. Linux terminologyMedium, MTDs (memory technology devices) includes from the drive ROM to NOR/NANDFlash card storage, the difference between them is very large, in the linux kernel provides a unified layer for seamless connection to the low MTD chip and into the user Module (user)Module ). PATA and SATA are both ATA standards, that is, what is often saidIDE. IDE is commonly used in workstations and servers to store OS bootloader and

Test the disk read/write speed in Linux

Sometimes, during maintenance, we always encounter a problem similar to Io, but it cannot be determined whether it is an I/O bottleneck or a hot disk caused by improper configuration of software parameters. at this time, we usually want to know the read/write speed of the disk for further decision-making. The following are two test methods: (1) Use the hdparm command This is a command used to obtain the parameters of the ATA/IDE hard disk. It was writ

38 typical blue screen cases and Solutions

: unmountable_boot_volume Error Analysis: this error is generally caused by a disk error. Sometimes it is recommended to check whether the hard disk connection Red is not in good contact or whether the connection line meets the hard disk transmission specifications, for example, ATA-100 hard drive still use ATA-33 connection line, does not matter to low speed hard drive, but high speed hard drive (Support

Udev learning Summary

rules acting on TTY are invalidKernel = "SCD [0-9] *", symlink + = "CDROM-% K" # Kernel = "SCD [0-9] *", represents the SCSI CD-ROM drive. It creates a pair of device symbolic connections: CDRom and CDROM-% K.Kernel = "HD [A-Z]", bus = "ide", sysfs {removable} = "1 ", sysfs {Device/media }== "CDROM", symlink + = "CDROM-% K" #The START kernel = "HD [A-Z]", indicating the ata cdrom Drive. This rule creates a symbolic connection with the above rule. The

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