There are now two main hard disk interface technologies on the server, SATA and SCSI, and the products that use SAS hard drives are currently listed, and of course high-end optical drives, the first two of which are the most common. Here we have a brief introduction to SATA, SCSI, SAS and other interface technologies.
Sata
SATA (serial Advanced Technology attachment) is the abbreviation for Serial ATA, which is currently available SATA-1 and SATA-2
system's registers to pass the hard drive's addressing parameters, it uses its own address pack, which holds 64-bit LBA addresses, and if the hard drive supports LBA addressing, delivers a low 28-bit address directly to the ATA dialog box , the operating system converts the LBA address to the CHS address and then to the ATA dialog box if it is not supported. In this way, it is possible to CHS addressable m
previous conf file is also#chmod 600/etc/sery.pass4/Start rsync
Server-side Startup# rsync--daemon--config=/etc/rsyncd.conf5/View listening status
Also server-side#lsof –i:8736/write rsync into the server self-boot
or the server-side# echo "/usr/bin/rsync--daemon--config=/etc/rsyncd.conf" >>/etc/rc.local7/Test Sync
This is the client.#rsync –avzp–-delete root@192.168.1.64::d ata/root/test–-password-file=/etc/Sery_client.pass1.–a use archive m
database created by the Qsqlquerymodel class to read and write to the inherited Qabstractitemmodel classAt first we talked about that the model is read-only by default, so we can't modify the contents of the table in the window. But we can create our own models and then display the data and modify the data as we wish.To make it readable and writable, you need your own class to inherit from Qsqlquerymodel, and rewrite the SetData () and flags () two functions. If we want to change the display of
Scope of application:
Some Lenovo Yang Tian, Kai Tian computer
Operation Steps:
Bios Entry Method Summary: For business desktop type, you can click F1 or del key to enter the bios of the motherboard, the new machine, please click the F1 key way to enter.
How to operate: after powering on the keyboard on the F1 or DEL key.
At present, the replacement system to adjust the BIOS can be divided into three categories
The first: set to compatible mode, through the arrow keys, the option to move t
interface specifications: PS/2 and USB
· Speaker: Speaker
· Printer: Printer
· Scanner
· UPS: power-on system
· IDE: indicates the Integrated Device of the IDE interface specification.
Electronics, IDE interface devices generally refer to various devices that use IDE interfaces.
· SCSI: refers to the SCSI interface specification Small Computer System
Interfaces and SCSI Interface devices generally refer to devices using SCSI interfaces.
· GHz: (the computing speed of the central processor reach
[H] ash Table X $ KCLFI-File Bucket Table X $ LE-Lock [E] lements X $ LE_STAT-Lock Conversion [STAT] istics X $ KCLFX-Lock Element [F] ree list statistics-7.3 or higher X $ KCLLS-Per LCK free list statistics-7.3 or higher X $ KCLQN-[N] ame (hash) table statistics-7.3 or higher [R] edo Component [M] edia recovery-kcra. h-7.3 or higher X $ KCRMF-[F] ile context X $ KCRMT-[T] hread context X $ KCRMX-Recovery Conte [X] t [F] ile read X $ KCRFX-File Read Conte [X] t-7.3 or higher Reco [V] ery Compon
Release date: 2011-10-21Updated on: 2011-10-21
Affected Systems:HP ata Protector Notebook extension7.0HP ata Protector Notebook extension6.20Description:--------------------------------------------------------------------------------Cve id: CVE-2011-3156, CVE-2011-3157, CVE-2011-3158, CVE-2011-3159, CVE-2011-3160, CVE-2011-3161
HP Data Protector Notebook Extension is a laptop backup software.
HP Data Protec
should be the installation floppy disk created on your windows95/98/NT4/2 K/XP workstation. The installation of a floppy disk will be used to start a dedicated PC and install MikroTik RouterOS on your hard disk or flash device ?.
2. Create the installation media and use the appropriate installation file to create the installation cd or floppy disk .? Write an ISO image into an empty CD .? For this floppy disk, run the manufacturing installation floppy disk on your windows workstation.
Insert th
First download the latest installation version from sourceforge.
Install
First download the latest installation version from sourceforge.
Decompress and compile$ tar -zxvf smartmontools-6.4.tar.gz$ cd smartmontools-6.4$ ./configure
Ifchecking for g++... noProblem
The reason is that the C ++ compiler is missing and used on CentOS.yum install gc-c++Install the compiler. For troubleshooting, refer to this blog.
Make make install$ make$ make install
General Usage
Use-iQuery hard disk infor
Brief introduction:This section describes the algorithms in the 12th and 13 episodes of the Stanford Machine learning public class: K-means algorithm, Gaussian mixture model (GMM). (9, 10, 11 episodes do not introduce, skip the ha)First, K-means algorithmIt belongs to unsupervised learning clustering algorithm, given a set of non-calibrated data (input sample), classify it, the hypothesis can be divided into K class. Because the algorithm is more intuitive, the steps and MATLAB code are given di
[Detailed process]In the past, if you wanted to simulate a program to take the hard disk serial number, inject a DLL into it, intercept the return value of deviceiocontrol, and change it to the value of the target hard disk.Later, we saw regmon intercept registry operations from ssdt. We could see any program's read/write operations, and changed the program. The test results can be similarThe serial number of the hard disk read by some programs, including asprotect and the descendant of the encr
is generally 3-15 ms.
2. Rotation Delay
Trotation refers to the time required for disk rotation to move the sector where the request data is located to the bottom of the read/write head. The rotation delay depends on the disk speed, which is usually expressed by 1/2 of the time required for disk rotation for one week. For example, the average rotation latency of a 7200 RPM disk is about 60*1000/7200/2 = 4.17 ms, while the average rotation latency of a 15000 rpm disk is 2 ms.
3. Data Transmissio
Hard Disks are mainly SCSI, IDE, and popular SATA; any hard disk must be produced according to certain standards; with the upgrade of the corresponding standards, hard Disk production technology is also upgrading; such as SCSI standards have gone through the SCSI-1, SCSI-2, SCSI-3; which we often see in the server site is based on Ultral-160 standards; the IDE follows the ATA standard, while the popular Sata is the upgraded version of the
price. When the cost is relatively small, RAID technology can enable individual users to enjoy doubled disk speed and higher data security, the IDE-RAID control chips on the PC market are mainly from highpoint and promise, and some are from AMI companies (such2 ).IDE-RAID chips for individual users generally only support RAID 0, RAID 1 and RAID 0 + 1 (RAID 10) raid specifications, although they are technically incomparable with commercial systems, the speed improvement and security assurance pr
)5. Whether the DMA mode is disabled by the system. Check the ide ata/atapi controller in the Device Manager and double-click "primary ide channel" and "secondary ide channel" to check whether the current transmission mode has changed to Pio mode in advanced settings?
If yes, follow these steps:1. Click Device Manager ";. Expand the "Ide ATA/atapi controller" node;Double-click the Controller for which you w
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