Direct memory access

So you have an old Dell PowerEdge 2900 Server laying around with a few hard drives and your thinking I would really like to use this equipment as a NAS drive. It could happen, in our case it did. There were some stumbling blocks on the way though. Here is how we got through them… The goals we wanted to accomplish were creating a RAID5 array of 8 (7+1 Hot Spare) 1TB hard drives and then wanted to connect this FreeNas volume through and iSCSI channel to a file server that will present the NAS as a shared folder all of our servers could use. We quickly found that using the factory PERC (PowerEdge RAID Controller) to create a RAID 5 Array was not going to work. Mostly because the drivers for this device provided in FreeNas are not very stable. Sometimes the system would boot, other times it would just hang during start up. We found that there other drivers available for FreeBSD that some folks have had success with but we still came across some comments that made us question them. So we opted to let FreeNas do the work instead. FreeNas has the ability to create RAID arrays in the form of ZFS Volumes. We chose to do a RAID 5 or ZFS1 volume. Before you say it, we know that a ZFS2 or ZFS3 provide better redundancy. Frankly, this NAS drive is going to be as a Backup storage unit and is not as critical as using it as a storage drive for a VM Server like Hyper-V or ESXi, therefore additional redundancy is not an issue for us. The steps that follow are not specific to the…

#Write a program that implements the Bubblesort algorithm #Registers used: # $a0 : For loading Syscall parameters like loading integer, string # address # $V0 : For intiating particular syscall and return values # $a1 : used as a argument to quicksort subroutine # $a2 : used as a argument to quicksort subroutine # $s1 : End address of iput array also as pointer # $s4,$t2 : Base Address of input array acts as pointer # $s3 : used to restore the address back to $s2 .text la…

predispositions, environment, and other factors affect children over the lifespan. A child 's development is often thought to begin at birth; however, while the child is still in the womb, there are months of development occurring. Parents are the primary influences over the life of a child and subsequently impact the child 's development. Moreover, events or conditions that take place while the mother is pregnant have a direct effect on the child and are more readily seen once the child is…

All memory is social. Everyday we create memories, and we all use memory in our everyday lives but in the end we only remember some of them. Memory is the tool we use to learn and think. Right now you're reading this, and you're probably thinking to yourself a memory of your own. In this paper I will be discussing the qualities, and nature from Professor Roy, William’s book, “Making Societies” and Sociologist Zerubavels’ text in “Time Maps”. Social memory helps to determine the boundaries around…

In addition, they also examine the struggle various people make and energy they devote in fighting for social justice. In the “Letter from Birmingham Jail”, by stating the remark “Injustice anywhere is threat to justice everywhere” (264), Martin Luther King explained the reason why African Americans should take direct action immediately rather than wait for the justice “to come.” As he suggests in the essay: “Nonviolent direct action seeks to create such a crisis and establish such creative…

SIMULATION RESULTS AND DISCUSSION 4.5.1 Compensation of Voltage Sags All the proposed controllers performed to the IEEE standard. Table 4.5 shows voltage sag compensation of the proposed intelligent controllers. Compensated SS value shows the voltage sag compensation capability of the each proposed controller under different fault types and load conditions. In case 1, performance of DVR with proposed fuzzy logic controller has the sag score 0.5056pu observed at sensitive load before…

Electrical Properties AC Conductivity, Ac Resistivity, Dielectric loss, and Dielectric constant are electrical properties and measured as a function of frequency. AC Conductivity and Resistivity AC resistance (ρac) was recorded by LCR meter model 4275 in the frequency range 1MHz to 3GHz. AC conductivity was determined by using the value of Ac resistance. As we know, Ac Conductivity is reciprocal of Ac resistance can be calculated by the relation; ac =1/ρac (6) The variation of AC…

Fig. 3. Schematic Diagram of Power Line Guardians (“PLG”) PLGs are also used to give the real-time data on the lines such as: line current, conductor temperature, frequency, sag [17]-[21]. Fig. 4. The PLG communications system. The diagram (Fig.4) shows the PLG communications system. PLGs (blue) control the power flows on the lines. Super PLGs (red) can control both the power flows and the PLGs. These Super PLGs are also used to communicate with Energy Management Systems (EMS) and allow…

“maximum input (participation) is required, and where output, not just policies (decisions) but also the development of social and political capacities of each individual, so that there is ‘feedback’ from output to input”. Largely, a representative democracy must function as a participatory democracy on a large scale; an exchange between representative and the represented in which both have checks to the demands of the other. Representative democracies are constituent based entities which exist…

Active Listening, Additional Support, and Effective Communication Active listening is imperative to be successful in any line of work, though it is specifically important in education because educators need to understand the parent’s viewpoints and feelings. Active listening can be defined as “the skill required to simply “feed back” the deeper felt message (not words) of the sender in the words of the receiver” (p. 151). Active listening involves going past listening to the sender in order to…