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
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
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
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
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
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
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.
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
, 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
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
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
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
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
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
: 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
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