lsi hba

calculated in milliseconds (1‰ seconds. the average rotation delay is half the time the disk is rotated in the entire circle. same as seek time, the size of the rotation delay moving in the random fan interval in read/write operations is more important than the speed indicator of the adjacent slice. the average rotation delay of 5400 to 5.5 disks per second is about 15000 milliseconds. For to 2 milliseconds. Data Transfer Rate The data transmission rate (also called the data transfer rate)

PMC launches industry's first 12gb/s SAS expansion card for high-density data center serversThe Adaptec PCIe expansion card provides 24 ports for next-generation servers,Connect more high-performance HDDs and SSDs A PMC that leads Big data connectivity, delivery, and storage, delivering innovative semiconductors and software solutions ? The Company (NASDAQ:PMCS) recently launched the industry's first 12gb/s SAS expansion card to enable high-density servers. IDC [i] believes that high-density ser

After the store arrives, usually the flow is on the shelves, on the line, and then on the electricity. After confirming that the configuration is correct, start creating the array and Lun as required, and after a few hours the system is basically done. The storage is then connected to the SAN based on actual needs. There is a need to zone on the switch so that the host's HBAs can see the appropriate controller. Finally, with the remaining storage Partition to be discussed, map the predefined LUN

First, UnixWare 7.1.1 installation (CDROM installation) 1. Boot boot UnixWare CD-1 from CDROM installation (CDROM must be Slot1 or Slot2 master) 2, installation language, select proceed with installation in 中文版, enter continue 3, Choose a zone for this system and press, select Americas (Latin-1), F10 continue 4, Choose a Locale for this system and press, select C (中文版), F10 continue 5, keyboard, choose United States,f10 Continue 6, input License number, License Code, License DATA,F10 conti

total of 28 hard drives. Piece of hard disk 300G,The total is 300g*28=8400g about 8.2TThis overall is a 8 t storage. 8000G is enough for the general data.This storage is counted as a small to medium storage. Small storage puts fewer hard drives. In order to cooperate with Oralce's study, it is necessary for us to describe the approximate knowledge of storage. After the storage, you can see the controller, power,Storage is generally dual-control dual-power, the storage itself is redundant. The c

functionCompile and install:(1) Enter the/bin in the Code master directoryModify text_similarity.plChange the first line to #!/usr/bin/perl(2) Return the Code home directory, respectively, to executePerl makefile.plMakeMake TestMake install(3) Re-enter the home directory/bin to testFigure 2.3-1 Code effectsYou can see the statement ".... This is one" and "???? This is the match degree of "0.66";"..... This is one" and "...." This is the "match" is still 0.66;"..... This is one" and "..." is the

operating system submits the writing data request must be really written to the underlying disk media to return success. Battery/capacitance differences: In order to ensure that the data in the "volatile" buffer can be flushed to the underlying disk media in time after the machine has been powered down, the storage controller has a battery/capacitor to guarantee. The normal battery has the capacity attenuation problem, namely every time, the onboard battery should be controlled

1. Environmental Hardware InformationMachine as Target end (PC)HBA Card: QLogicWwn1:21:00:00:1b:32:81:6e:f1System: Ubuntu 15.04 ServerMachine as initiator end (PC server)System: XenServerHba:qlogicwwn1:21:00:00:1b:32:98:7d:1bFC Switch: Brocade 200E2. Switch configuration1) View the WWWN number corresponding to the switch portSwd77:admin> SwitchshowSwitchname:swd77switchtype:34.0Switchstate:onlineSwitchmode:nativeSwitchrole:principalSwitchdomain:1Switc

Some knowledge about storageAccording to the different transmission protocols, the network card can be divided into three kinds, one is the Ethernet card, the second is the FC network card, the third is the iSCSI network card. Ethernet Card: The Scientific name Ethernet Adapter, the transmission protocol for the IP protocol, generally via fiber optic cable or twisted pair with Ethernet switch connection. The interface types are divided into optical and electrical ports. Optical ports ar

seen on server B. After troubleshooting, the new server's HbA card is somewhat incompatible with the SAN Switch, you need to plug it in. The HbA card of the new server is 2/4/8 GB adaptive, and the optical fiber card of the SAN Switch is 2/4 GB adaptive. Therefore, inconsistency may occur. But it doesn't matter. Just re-plug the HBA card or change the speed of t

connection pool to maintain the web site. Therefore, as more connections are blocked, the Web site creates more connections, and these connections are blocked, this cycle will continue. The log write operation will be completed in about 45 seconds, but hundreds of connections have accumulated so far, leading to blocking problems, it takes several minutes for SQL Server and applications to be restored. When combined with Application Problems, latency I/O conditions will have a very negative impa

When a PC server host connects to FC storage, it is generally necessary to install an HBA card, and an important parameter of the interface is the WWN number. The way to view the WWN number under Redhat or SuSE is as follows. One, SuSE Linux 9 View the/proc/scsi/qla2xxx/* and filter the WWN information for the FC HBA card with the Adapter-port keyword: # cat/proc/scsi/qla2xxx/* | grep adapter-port scsi-qla

Mobile phone brands are not a new concept because Apple and Samsung have already done so. Since Huawei this year because of the launch of the 920 in the high-end model of the first-class full use of self-research chip and get a good market response, as if all of a sudden hanging up the appetite of other companies, ZTE has launched its own processor, millet and the core of the formation of joint ventures, mobile phone brand manufacturers really must self-research chip? In the mainland mobile phon

1. Clock source Three different clock sources can do the system clock (SYSCLK):HSI oscillator Clock: high-speed internal clockHSE oscillator Clock: high-speed external clockPLL ClockTwo x two-level clocksLSI (Low speed internal clock): 32kHz low-speed internal RC (LSI RC) Independent watchdog clock Source, RTC can be used for automatic wake-up stop/Standby mode.LSE (Low Speed external clock): 32.768kHz Low SPEED external oscillator (LSE cryst

*/BKP_DeInit ();/* Enable the lsi osc */RCC_LSICmd (ENABLE);/* Wait till LSI is read Y */while (RCC_GetFlagStatus (RCC_FLAG_LSIRDY) = RESET) {}/ * Select the RTC Clock Source */RCC_RTCCLKConfig (RCC_RTCCLKSource_LSI ); /* Enable the RTC Clock */RCC_RTCCLKCmd (ENABLE);/* RTC configuration restart * // * Wait for rtc apb registers synchronisation */RTC_WaitForSynchro ();/* Set RTC prescaler: set RTC period t

10, an evaluation kit that supports the Arduino open platform. The Rohm sensor expansion Board is fully compatible with the Arduino UNO Development Board, which can be plugged into a variety of Roma sensors, and now has a pulse sensor expansion board, which can be purchased on the official website from February 2017 onwards.BH1790GLC has started selling samples in October 2016 (600 yen/per: excluding tax), and in November 2016 it began to produce 500,000 of the monthly output, and the productio

operating system is written directly to the buffer to return to success, and write through mode, the operating system submits the writing data request must be really written to the underlying disk media to return success. Battery/capacitance differences: In order to ensure that the data in the "volatile" buffer can be flushed to the underlying disk media in time after the machine has been powered down, the storage controller has a battery/capacitor to guarantee. The normal battery

multicolumn secondary indexes. At the end of the test, TOKUDB's insertion rate remained at 14,532 Inserts/second whereas InnoDB had dropped to 1,607 ins Erts/second. That's a difference of over 9x.Platform:centos 5.6; 2x Xeon L5520; 72GB RAM; LSI MegaRAID 9285; 2x 256GB Samsung 830 in RAID0highest COMPRESSIONCompression is an always-on feature of Tokudb. We tested InnoDB compression with the values of key_block_size (4k and 8k) and with compression d

Intersector * linesegmentintersector: Clone (osgutil: intersegmvisitor IV){If (_ coordinateframe = Model IV. getmodelmatrix () = 0){OSG: ref_ptr LSI-> _ parent = this;Return LSI. Release ();} // Compute the matrix that takes this intersector from its coordinateframe into the local model Coordinate Frame// That geometry in the scene graph will always be in .//OSG: matrix;Switch (_ coordinateframe){Case (wi

. set the write Cache Policy to force write back, and keep the write Cache Policy writeback even if the battery fails. This poses a risk of data loss after power loss. At present, some hardware manufacturers provide capacitor-powered raid cards. If there is no problem of battery charge/discharge, you can contact your hardware manufacturer. 2. RAID card configuration Disable read cache: the cache capacity on the raid card is limited. We select direct to read data and ignore the read cache. Disabl