Feb 7

Experience Helps With Computer Crashes

Posted in Computer Stuff

If you have ever experienced your computer malfunctioning or crashing and you need help then you understand just how confusing and frustrating this experience can be. You maybe sitting there one minute about to download the latest song or send your friend a email when all of a sudden your computer begins functioning weird. Now functions like getting on the internet or opening a word document take more than a minute to execute. This occurs usually because of two different scenarios either your computer has been internally damaged thanks to malware or it has been externally damaged thanks to a electrical surge or a spill.

computer-problemsIn cases of an internal issue such as malware these usually occur when a virus has either been uploaded to the computer from another electronic device or has been downloaded from the internet via a unsecured website. External issues such as dropping the computer tower and spilling a liquid on it can cause just as much damage to hardware of a computer as an internal issue. Regardless of the reason it is important to have some back up solutions just in case you experience a complete loss of power. A flash drive Click here to read more.. »

Jan 20

Choosing The Right Blog Name

ctrbnLearning how to start a blog can help with the entire creation process and can help one get more traffic to your website. Nonetheless, one thing that usually attracts people is title, so it must be perfect. The easiest way to create a catchy title is using an automated software product.

The title usually depends on the purpose of a blog. If it should be for a product or personal point of view, one can use his name, and for business purposes, the title should be descriptive. It is important to figure out the domain name that is related to topics of the blog, and that is different from other similar blogs. The good thing is that domain name sellers can tell one if the particular domain name is already taken. Click here to read more.. »

Jan 5

AutoRAID Broke Open RAID Initiatives

Posted in Computer Stuff

Hewlett Packard’s AutoRAID technology greatly improved the stability and security of early RAID systems – without sacrificing performance, and is the model around which most RAID setups are designed around today. By allowing users to add and replace disks anywhere in the array, it granted the flexibility that previous RAID iterations could not. It was a key step in the mass adoption of RAID technologies throughout the small business arena.

A classic machine: HP AutoRAID

A classic machine: HP AutoRAID

Those who have seen the product feel it is a noteworthy improvement over existing RAID systems. “It’s a very significant announcement for the entire industry,” said Tom Lahive, senior analyst at International Data Corp. (IDC; Framingham, Mass.). “The beauty of it is that most other vendors are just starting to integrate some type of software management. What HP has done is make a controller that has more intelligent features than most others. It really, truly is automatic RAID.”

A key technique of AutoRAID is dynamic data migration, which enables the system to use different RAID levels to provide quicker data accessing or lower-cost storage. Data being actively used is moved to RAID 0 or 1 level, in much the same way that common disk drives move active data to cache memory. Constantly moving data within the array balances overall performance and cost, HP said.

Dynamic algorithims

“With current systems, you have to select two of the three parameters people want with RAID: low cost, high performance and high availability,” said Roger Buckthal, project manager at HP’s Storage Systems Division. “The underlying innovation is a new way of addressing. Our mapping technique maps the host address to the disk address in a dynamic way. The dynamic algorithm is the key for us to change the active data to levels 0 or 1 to provide performance and put less active data in level 5, which is more cost effective.”

Buckthal noted that although HP is providing details about the different RAID levels, users no longer have to master the fine points of which level is best for different requirements because AutoRAID constantly moves data around automatically.

“We’re trying to get away from talking about the levels,” said Joe Molina, chairman of the RAID Advisory Board (St. Peter, Minn.), a trade association. “Users spend a lot of time worrying about those levels when they should really be thinking about performance, price and reliability.”

The HP system also permits on-line expansion. When drives are added, the management software reconfigures the system to take advantage of the additional capacity. Both active data and parity data used for on the new drive. This technique can also be used to replace failed drives.

“Another thing that’s different about this system is that when you add drives, disk capacity is not important,” Buckthal said. “We treat the disks not as complete disk drives but as blocks of storage. All the drives together are like a large pool of storage.”

He noted that this technique also makes it possible to use some of the capacity of a so-called hot spare for active data. Traditionally, a hot spare is kept powered up, holding mainly parity data. When a drive fails, the hot spare is called into play.

The HP technique uses some of the capacity of the drive, but distributes most of the spare capacity across all the disk drives in the array. That capacity is kept empty, so that space will be available when a drive fails. Spreading the data around helps improve performance, Buckthal said.

Treating disks as blocks of data also eliminates the tricky problem of spindle synching, which has been necessary to make sure that data comes off the individual disks at the same time. It also lets HP intermix drives that have different spin rates, which makes it simpler to upgrade systems as technology advances or budgets are fattened. Drives provide identification information so the controller knows what capacity and performance traits each drive has.

If there is one issue with the AutoRAID format, it’s that the drives do have the tendency to fail.

“The AutoRAID setup is very progressive, and does have some protections against RAID array failure,” says Len Travers, data recovery technician with Irvine, CA’s Hard Drive Recovery Associates. “Recovering these arrays, on the other hand, can be a major chore. The disk setup is far less recoverable than your regular RAID 5 machine.”

AutoRAID is part of a major focus Click here to read more.. »

Dec 27

Moving On From Backup Tape Not Only Necessary, But Critical

Posted in Computer Stuff

The numbers are dizzying. Ten million customers being serviced by 49,000 employees in 1,400 branch offices in more than 30 countries.

All amassing data faster than dot-coms are crashing on the stock market. This is what Dan Ledgerwood had to contend with.

No one might have been happier than Ledgerwood, senior storage management analyst at the Royal Bank of Canada in Toronto, to have gained an hour when the clocks went back. For more than a year, he has been trying to solve the bank’s host tape issues. And the clock is ticking. Click here to read more.. »

Dec 8

Computer Systems Allow A Different View Of Physics

Posted in Computer Stuff

UCLA’s Computer Promoted Understanding of Physics Concepts (CPUPC) has continued to be a major tool for students looking to understand the basic principles of physics.

The software provides five separate experiments demonstrating the principles presented in the standard curriculum’s lectures and laboratories. Each experiment is further divided into a demonstration mode and a test/report mode. For example, one experiment illustrates mechanics principles using a bouncing ball. In the demonstration mode, students can vary the numerical parameters associated with the ball, such as initial velocity, vertical and horizontal components, or the presence or absence of air, and get a graphical representation of the impact of such variations. In the test mode, students are required to complete specific, assigned experiments and then are graded based on lab reports of their findings. “Here,” says Bercham, “they can’t play with all of the variables. We may change the value of the acceleration constant, for example, and then ask the student to calculate this unknown. Unlike in the demonstration mode, they can’t play with the …

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Dec 6

How To Conduct Manual RAID Repair

Posted in Computer Stuff

htcmrrRAID is a term used to refer to a storage technology. The acronym used to stand for Redundant Array of Inexpensive Disks but later, manufacturers started referring to it as Redundant Array of Independent Disks. Whatever term is used, this device ensures that data is not lost by storing it over several disks.

In companies where stored data serves as the backbone of each operation, a malfunctioning RAID can be disastrous. In some instances, manual RAID repair is necessary. This is how manual repair is done. First, see to it that all connections and installations of the disks are done properly. After you have done this and everything is alright, you open your Mac OS X Disc Utility. The malfunctioning array must be highlighted before you select the tab labeled RAID. You would know the problem because it will be displayed. If the RAID repair is needed because of data inconsistency, you will see the word “Failed” next to the degraded disk. A drive that is defective or missing will be indicated by the word “Offline.” If the problem involves inconsistencies, clicking the rebuild button will do the trick. If there is a missing drive, select a replacement to the right window and click the button that says Rebuild. Manual RAID repair can solve the problem instantly or it might take a few days. Be patient and keep monitoring the system until repair is complete. A complete tutorial is here.

Another Way Of Recovering Hard Drive Click here to read more.. »