to claiming that its tape library can be managed in the SMI-S-compliant console, it also provides APIs (application interfaces ), other vendors can use these APIs to manage the ADIC tape library. Currently, EMC uses this method: In the same EMC San topology, the ADIC tape library is displayed in real time together with other San components, however, the specific management work is still implemented through
1 : no function is provided in the circuit. It is only for convenience of debugging or Compatibility Design on the PCB. 2 : Jumper can be used. If a line is not used, do not paste the resistor directly (without affecting the appearance) 3 : when the matching circuit parameters are uncertain, use 0 ohm instead. during actual debugging, determine the parameters, then, it is replaced by a component of a specific value. 4. when you want to test the current consumption of some circuits, you ca
-euro resistor if it cannot be deprecated.
6. Act as an inductor or capacitor under a high-frequency signal. Inductance is used to solve EMC problems. Such as location, power supply, and IC pin.
7. Single Point Grounding (Protection grounding, working grounding, DC grounding are separated from each other on the equipment, and each of them becomes an independent system .)
8. Use fuses. Because the circuit breaking current on the PCB is large, if sho
Original link http://www.ibm.com/developerworks/cn/linux/l-cn-ipv6env/
Build an IPv6 test environment on the Linux platform and IPv4 Environment
Jiang yingyu
, Software engineer, EMC Jiang Ying Yu, IBM software engineer, engaged in uxspi-related software R D and testing Yin yiming
Yinym@cn.ibm.com
), Software engineer, EMC Yin yiming, IBM software engineer, engaged in uxspi-related software R D and Testin
, power supply circuit design is a hardware engineer circuit capability of the centralized embodiment, a variety of passive devices, semiconductor devices, protection devices, DC/DC conversion Typical topology, there are many parameters, The formula needs to be considered, calculated to.6, the ability of communication and global control:Hardware Engineer in a hardware project, generally in the role of team leader, to the full responsibility of this hardware project, need to coordinate the PCB en
With the popularization of 3G technology and the development of wireless standards and technologies such as LTE, NFC, Bluetooth 4.0, cmms B, and MIMO, mobile Terminals need to integrate multi-band main antennas (supporting 2g, 3G, LTE and other multi-standard), as well as GPS, BT, WiFi, NFC, wireless charging and other antennas.
As a result, terminal antenna engineers are facing huge challenges:
Antenna size
-The cell phone size is getting smaller and smaller.-The 'clear' of the antenna is getti
Before designing a multilayer PCB, the designer must first determine the structure of the PCB based on the circuit size, circuit board size, and EMC requirements, that is, it is decided to adopt a 4-layer, 6-layer, or more layers of the circuit board. After determining the number of layers, determine the placement location of the inner electrical layer and how different signals are distributed on these layers. This is the choice of multilayer PCB stac
", which forms multiple links, if a disk is selected from the storage on the host, many disks may be released on the host, which will make the operator unable to choose which disk to operate. To avoid this cumbersome disk link, the multi-path software is used to aggregate multiple paths. It facilitates disk management and load balancing. If one link is disconnected, other links are still available, which will not affect disk access.
Several multi-path software:
(1) IBM host and IBM storage: RDA
This week, two sets of EMC storage are migrated, and several intranet database servers are attached to the storage space. You need to migrate the stored database to the server. The specific migration steps are as follows:
I. Environment:
1. original database server: 172.28.29.21 (Mount EMC to the/sandata directory)
2. Database Server: 10.20.220.107
II. Specific ideas:
1. Run NFS on 10.20.220.107 and mount/d
Manager agent will not register host with clariion Array
Primus self-service
EMC Knowledgebase
"Manager agent will not register host with clariion array"
ID:
Emc125015
Usage:
70
Date created:
12/30/2005
Last modified:
06/13/2006
Status:
Approved
Au
power supply plane is reduced at least 20 times the layer distance between two planes than that of the 0 V plane. This rule is often required to be used as a side-side shooting technique to reduce the plane structure from 0 V/power.
However, 20 h rules only provide obvious results under certain conditions. These specific conditions include:
(1) The rise/fall time of current fluctuation in the power supply bus must be less than 1ns.
(2) The power supply plane must be on the internal layer
environment and no problems are found.$./Runcluvfy. sh stage-pre crsinst-n node1, node2-verbose$./Runcluvfy. sh comp ssa-n all-verbose
6. Operating System logs, no errors found
IBM:/bin/errpt-a> messages. out
At this point, you can confirm that, according to the oracle Installation documentation, the current disk permissions fully comply with the installation conditions. In the GI graphical installation process, you can also see the ASM disk, but in the root. sh cannot be passed during executio
Today, the core system adds a disk (EMCDMX4) to the ASMdg, and then the two nodes of the database RAC are both crash, which immediately becomes a cold sweat. Check log: NOTE: Diskinmode0x8markedforde-assignmentERROR: diskgroupDGIDX1wasnotmountedORA-15032: notallalterationsperf
Today, the core system adds a disk (EMC DMX4) to the ASM dg, and then the two nodes of the database RAC both fall into the crash, which suddenly becomes a cold sweat. Check log:
When programming and running code from the external flash, it's particularly important to make sure so you have the Boo T pins P2_9, P2_8, P1_2, and p1_1 is correctly connected so this MCU starts execution from the correct memory address . For more details, please see the NXP documentation.If The boot pins is incorrectly set, then this would typically result in the initial default breakpoint set by the Debugge R on Main () is not been reached. You can confirm if this is the case by clicking on s
room. Gigabit Backbone Ethernet Direct access to at least forged cabinet what firewalls, routers, switches, load Balancing yes, I can get him all the way upstairs there is a gym, there is a game room inside the door son, You're going to have to talk to someone about it. Can I help you sir? A typical British London cavity son has the face what hibernate, structs, spring,activemq all give me to do not say code how many lines, the light XML configuration file on 100M multi-gigabit An
For Exchange administrators, in addition to the daily handling of related mail problems, but also to ensure that the mail server security, stability, and of course, to ensure that the server certificate to provide services, to understand and know as far as possible that the mail certificate meet will expire, In case of overdue to be replaced as early as possible to ensure the user's normal use and experience, today and everyone to share about the Exchange certificate renewal related content, of
load sharing based on the mailbox database.Implementation processMain steps:Create a DAG GroupSet the cluster IP address for the DAG groupManage DAG Group membersCreate a mailbox databaseCreate a mailbox Database copyTest the mailbox database for automatic switching.Manually switch mailbox databasesCreate a DAG groupOpen the EMC console, expand organization Configuration-mailbox-database availability group, not configured by default650) this.width=65
a lower performance than the best performance, as if you were God and could foresee the future. Now X86CPU encountered a frequency limit, the main way to improve CPU performance is to increase the high-speed cache.
4, large system small do
Don't panic when you encounter a large system, cut it into multiple modules, and use multiple small programs to work through SOA collaboration. This is a concept of UNIX design. UNIX has developed a large number of single-purpose small programs, it advocates
data is written to the present.
S process status D = non-disruptive sleep status R = Running S = sleep T = tracking/stopping Z = Zombie processCOMMAND line, COMMAND
If the process is sleep, WCHAN displays the system function name in sleep.
FLAGS task flag
2. View network problems
Whether netstat-I 1 has packet loss or network errors
Iftop [d s]: Check whether the port information of the local machine is displayed when the process traffic flow is switched by S; whether the port information of th
deployment, with dedicated NAS devices on the market. In just a few years, Nas has become one of the flagship devices for networked data storage solutions with the central idea of simple and efficient applications. EMC company Celerra Products are now leading the global NAS market with outstanding performance and versatility.NAS ConceptsNAS (network-attached Storage, Network attached storage) is a file-level computer data store connected to a compute
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