Under aix how to find the parent device and delete view the device's parent device and sub-device 1, check a device's parent device # lsdev-Clhdisk1hdisk1Availabl... information nbsp; | nbsp; Security nbsp; in aix, how do I find the parent device and delete the parent and child devices of the device? ==================== ========================================================== ===================================1. query the parent device of a device # lsdev-Cl hdisk1hdisk1 Available 01 -08-
extensive application of ide/eide, the global Standardization protocol induces the technical specifications used by the interface since its inception as a global hard drive standard, resulting in ATA (Advanced technology Attachment).Serial scsi (sas:serial attached SCSI) is a kind of computer technology, which is mainly used as the interface for data transmission of peripheral parts, such as hard disk, CD-ROM and other devices. Serial SCSI evolved from the parallel SCSI physical storage interfa
PMC provides cost-effective customized server hardware for ultra-large scale deployment
PMC announced the first release of 16 Port 12 Gb/s SAS and 16 port 6 Gb/s sata I/O controller solutions. PMC's data center I/O Controller Product Series help OEMs and ODM to provide cost-effective customized server hardware for ultra-large scale deployment, deployment in environments such as opencompute, Windows ECs, open stack, and Scorpio plan. The port density o
disk is mainly used in middle and high-end servers, high-end workstations and storage devices.
The SCSI interface is currently used with 68-pin and 80-pin interface specifications.
The SCSI interface is a parallel transport interface.
To emphasize, SCSI this kind of hard disk basically already eliminated, use very few similar to SATA replace Pata, SCSI also must be replaced by its upgrade product SAS (serial attached SCSI).
(iii)
set many of the latter's parameters for you, making the entire conversion process simpler and consistent.
First, download and install the Hmisc package (the foreign package is installed by default):
> install.packages ("Hmisc")
Then, use the following code to import:
> Library (HMISC)
MyData
In this code, MYSPSS.SAV is the SPSS data file to be imported, and use.value.labels=true means that the function imports the variable with the value label into the same factor as the horizontal correspondi
ability to break through the bottleneck, can make the entire industry scale start to grow exponentially.
Privately, it is only by understanding the origins of the era of big data that we can put our position in the tide of times.
Milestone 2:r/python
Two years ago, we were discussing "what software should be used for statistical analysis". There were many options at the time, Spss,sas,r,python,excel,eviews,stata,c++,java ... The number is not counte
Whether it's data analysis, data visualization, or data mining, everything is based on data as the most basic element. Using Python for data analysis, the same most important step is how to import data into Python before you can implement data analysis, data visualization, data mining, and so on.
In this period of Python learning, we will take a detailed description of how Python obtains external data, from which we will learn about the following 4 areas of data acquisition:
sipsession is used to save the state, do list or map really need it ?... It seems that no longer needed!
Sipsession lifecycle
Haha !~ It's all nonsense! You only need to set the session attribute value (held) when you receive the 182 message as a tag. When you receive the ACK message, you can judge the Ack. getsession (). whether getattribut ("flag") equals held. if yes, proxy the ACK request and
Sipapplicationsession SAS = ack. getapplicationsessi
The following is the method of Baidu, fsck cautious use, in addition fuser can solve Umount encounter device busy situation
Mount;d f-h Vi/etc/fstab is a number of commands that are often used when you encounter read-only and file systems
But the situation I encountered the above method is invalid, is the hardware direct failure of a lot of command lost no response, file system only read but under the mount to see all is RW; After the system restart directly halt off;
Check the ILO log tips h
want the drive to vibrate during operation,The computer's vibrating magnetic arm can also vibrate, and the head may touch the track,And the disc has been spinning, it is possible to scrape the disc.We want the hard drive to maintain a stable working state.The hard disk is actually a mechanical device, only a minute to turn 10,000 rpm,While Pathfinding is a mechanical work, the main time to fetch data from a hard drive is spent on seeking the road.Read data consumption time from hard disk: Maxim
transmission is very efficient, but due to physical reasons on the line, the transmission frequency cannot be too high, so the actual transmission speed is not proportional to the degree of parallelism, or even worse.
(2) The serial interface refers to the serial transmission interface, which is also 0 ~ 9 10 digits. If one transmission line is used, it must be transmitted for 10 times and the Hong Kong virtual host can be used.Theoretically, the serial transmission efficiency is not high, but
File System Knowledge SummaryWhat do I need to do to store the data for a newly purchased hard drive?First, the hard disk installed RAID, after the raid to partition, after the completion of the format to create a file system, and finally storage data.internal and external structure of the hard drive:Physical shape:Interface type:The IDE (Integrated drive Electronics) is an "electronic integrated driver".SCSI (Small computer system Interface) small computer system interface.SATA (Serial Advanced
to achieve enterprise-level server performance and reliability. Its standard 2 GB FB-DIMM/ECC full buffer memory, if using a single 4 GB memory can support 32 GB of massive memory. Powerful I/O scalability of servers to meet the potential application requirements of most users. The dual-gigabit network interface and multiple extension interfaces inside the server fully meet users' demanding requirements for server functional upgrade in the future, the design of the front and rear external USB i
also place mon on osd, which is not recommended in the production environment.The hardware configuration of the ADM server is relatively random. You can use a low-configuration virtual machine to operate and manage Ceph;Two hard disks of the MON server are used as RAID 1 to install the operating system;The OSD server uses 10 4 TB hard disks for Ceph storage. Each osd corresponds to one hard disk, and each osd requires one Journal. Therefore, 10 journals are required for 10 hard disks, we use tw
and main memory to focus on the flash devices in the Processing System by detaching the operating system kernel and driver, thus greatly improving the flash memory performance. PMC launched the first 6 GB/sec SAS/SATA and 8 GB/sec fiber rechannel controller in 2007, followed by adaptec and added 12 GB/sec SAS products in 2012.
In the same year, PMC added a new player to support nvme flash and NVRAM control
textbooks in "logistics regression model-Method and Application" Wang jichuan Guo Zhigang Higher Education Press. Both of them are from the perspective of sociology, and they are applied without re-derivation. Each chapter has a detailed analysis of the SAS and SPSS programs and outputs. It is estimated that there are many books written in Chinese, but the style of books written by foreigners is obvious.Iii. Diversity1. Application of multivariate an
tolerance system combines the security and reliability of the disk array products with the advantages of the dual-Machine Fault Tolerance Technology and high availability. The disk array has made many optimizations and improvements to the dual-host Fault Tolerance Technology to meet the connection requirements of the dual-host hardware. Based on the actual situation of the application environment, it is suitable for Windows and later platforms, open-source Linux platforms, multiple hot standby
Step 1: Start the SAS installer, my system configuration, Windows 7, 64bit Home Edition
Step 2: select the installation method. Here, follow the default installation path.
Step 3: it is very important to follow my methods.
This is a key step. The first "perform a planned deployment" is selected in the tutorial that teaches you how to install SAS 9.3 On the NPC Forum. The installation scheme of
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