Tag Archives: disk

Computer Optimization – Tips on how to Tune-up Your Computer in a few Easy Steps

A slow and sluggish computer might be highly irritating and difficult, which is why implementing successful computer optimization approaches is vital. Slow performance of your computer can lead to decreased efficiency, which can even result in monetary loss in some situations. Besides from increasing MEMORY size and maintaining a high level of security ecosystem for your laptop, there are a few simple techniques that a user can utilize to help keep the performance of a computer at an optimal degree.
Listed below are few such quick but effective steps that one can perform for laptop or computer optimization:

• Cleaning up the PC Registry – The registry of any computer is a huge database with info and data about your configuration and features of this PC system. Presence of unwanted or maybe incorrect entries in the registry can lead to bugs or errors, which will subsequently make the system slow and also begin giving errors often. There are some great registry cleaning tools available in computer stores together with online, that one may purchase or sometimes download totally free. These software programs are generally very helpful in repairing bugs or errors, making sure of that the registry is healthy and free of corrupted or redundant records. This is one of the most effective computer optimization methods.

• Disk Defragmenter – Fragmented files decrease the performance of the computer since the computer has to search for all of the file’s elements in the complete hard disk. When software programs and files are put into the computer, they are often split into pieces of data that are placed next to each other for quicker access in addition to retrieval. However, as the number of files and programs in the PC keep growing along with usage, the computer saves the updates inside the largest space available on the hard disk. This results in fragmented files which are stored in distributed spots, leading to slow performance from the PC. The Disk Defragmenter tool places all related data files together in correct order, which means that the device will now take less timeframe to find and track down the searched file.

• Disk Cleanup – Cleaning the disk is like clearing the mess in a space or a cabinet. It removes all the temporary files which are created and stored if the user looks at websites or works on files in numerous programs. These programs can contain software like Microsoft Word and Excel. Over time, the number of short-lived files increases, reducing the computer’s efficiency substantially. The Disk Cleanup program facilitates to get the computer rid of most of these unnecessary files, thus helping in entire computer optimization.

• Webpage history size reduction – Firefox or other browsers store visited website pages and other Internet browsing information (for instance pictures, videos etc) on the PC. Although it might be good to keep the web history for day or two within the computer, keeping more than a week’s history seriously isn’t required and thus ought to be removed from the personal computer. Too much data accumulated and stored from internet pages can slow down the actual computer’s performance. Reducing the size of website page history helps in computer system optimization.

Overall, taking care of the performance of one’s computer is not a tough activity. With good use with the above tools and techniques, computer optimization may be simple and hassle free.

The Truth about RAID Technology

RAID – Redundant Array of Inexpensive (or sometimes “Independent”) Disks – is a method of combining several hard drives into one logical unit. It can offer fault tolerance and higher throughput levels than a single hard drive or group of independent hard drives.

RAID is a mature technology that speeds up data access while at the same time protecting your data from hard disk failure. RAID is quickly becoming a necessary component in every network since data loss and downtime can prove both fatal and financially destructive. Most networks are designed to provide instant access to massive amounts of data. More and more employees have to access customer and other databases. Intranets and corporate Web sites provide access to huge databases online.
RAID provides increased storage capacities, and protects your important data from hard drive failure.
RAID Levels:
RAID 0
RAID 1
RAID 3
RAID 5
RAID 10
There are multiple benefits of using RAID:
Reliability
Scalability
Real-time data recovery with uninterrupted access when a hard drive fails
System uptime and network availability
Protection against data loss
multiple drives working in parallel increase system performance
A disk system with RAID capability can protect its data and provide on-line, immediate access to its data, despite a single disk failure (some RAID storage systems can withstand two concurrent disk failures). RAID capability also provides for the on-line reconstruction of the contents of a failed disk to a replacement disk.
RAID offers faster hard drive performance and nearly complete data safety. Storage requirements are expanding as file sizes get bigger and rendering needs get more complex. If you handle very large images or work on audio and video files, faster data throughput means enhanced productivity. RAID can be backed up to tape while the system is in use.
There are 5 most commonly used RAID levels. These levels are not ratings, but rather classifications of functionality. Different RAID levels offer dramatic differences in performance, data availability and data integrity depending on the specific I/O environment. There is no single RAID level that is perfect for all users.
Storage Requirements can be calculated through RAID Calculator.

RAID 0: STRIPING
RAID 0 refers to striping data across multiple disks without any redundant information. Data is divided into blocks and distributed sequentially among the disks. This level is also referred to as pure striping. The number of disk drives needed to create a RAID 0 is one or more. In other words, a single drive can be configured as a RAID 0 array. This type of array can be used to enhance performance in either a request rate intensive or transfer rate intensive environment. Unfortunately, striping reduces the level of data availability since a disk failure will cause the entire array to be inaccessible.

RAID 0 was not defined originally but has become a commonly used term.

Advantages:
Easy to Implement
No capacity loss – all storage is usable

Disadvantages:
Not a “true” RAID due to the lack of fault-tolerance
Failure of only one disk will result in loss of all data on the array
RAID 1: MIRRORING / DUPLEXING
RAID 1 is the first defined level that allows a measure of data redundancy. Data written to one disk drive is simultaneously written to another disk drive. If one disk fails, the other disk can be used to run the system and reconstruct the failed disk. Since the disk is mirrored, it does not matter if one of them fails because both disks contain the same data at all times.
RAID level 1 provides high data availability since two complete copies of all information are maintained. In addition, read performance may be enhanced if the array controller allows simultaneous reads from both members of a mirrored pair. Higher availability will be achieved if both disks in a mirror pair are on separate I/O busses, known as duplexing.

Advantages:
Higher read performance than a single disk

Disadvantages:
Requires twice the desired disk space
RAID 3: SRTIPING AND PARITY
In RAID 3, data is striped across a set of disks. In addition, parity is generated and stored on a dedicated disk. With RAID 3, data chunks are much smaller than the average I/O size and the disk spindles are synchronized to enhance throughput in transfer rate intensive environments. RAID 3 is well suited for CAD/CAM or imaging type applications as well as streaming media. Since parity is used, a RAID 3 stripe set can withstand a single disk failure without losing data or access to data.
Advantages:
Good data availability
High performance for transfer rate intensive applications
Cost effective – only 1 extra disk is required for parity

Disadvantages:
Poor random I/O performance
Disk failure has a significant impact on performance
RAID 5: SRTIPING AND PARITY
RAID 5, similar to level 3, stripes data and parity to generate redundancy. However, instead of requiring entirely new disk for parity storage, the parity is distributed through the stripe of the disk array.
In RAID 5 both parity and data are striped across a set of separate disks. Next, the new parity is calculated. Finally, the new data and parity are written to separate disks. Data chunks are much larger than the average I/O size, but are still resizable. Disks are able to satisfy requests independently which provides high read performance in a request rate intensive environment. Since parity information is used, a RAID 5 stripe can withstand a single disk failure without losing data or access to data.

Advantages:
Highest read data transaction rates
Cost effective – only 1 extra disk is required

Disadvantages:
Individual block data transfer rate same as a single disk.
RAID 10
RAID 10 is technically (RAID 1 + RAID 0), a combination of RAID 1 and 0 – mirroring and striping, but without parity. RAID 10 is a stripe across a number of mirrored drives. It is implemented as a striped array whose segments are RAID 1 arrays. RAID 10 has the same fault tolerance as RAID level 1, as well as the same overhead for fault-tolerance as mirroring alone.

Advantages:
Very high I/O rates are achieved by striping RAID 1 segments
Excellent solution for sites that would normally use RAID 1
Great for Oracle and other databases which need high performance and fault tolerance.

Disadvantages:
Expensive to maintain
As with Raid 1 total capacity is equal to half of the total capacity of all disk in the array.

The Truth about RAID Technology

RAID – Redundant Array of Inexpensive (or sometimes “Independent”) Disks – is a method of combining several hard drives into one logical unit. It can offer fault tolerance and higher throughput levels than a single hard drive or group of independent hard drives.

RAID is a mature technology that speeds up data access while at the same time protecting your data from hard disk failure. RAID is quickly becoming a necessary component in every network since data loss and downtime can prove both fatal and financially destructive. Most networks are designed to provide instant access to massive amounts of data. More and more employees have to access customer and other databases. Intranets and corporate Web sites provide access to huge databases online.
RAID provides increased storage capacities, and protects your important data from hard drive failure.
RAID Levels:
RAID 0
RAID 1
RAID 3
RAID 5
RAID 10
There are multiple benefits of using RAID:
Reliability
Scalability
Real-time data recovery with uninterrupted access when a hard drive fails
System uptime and network availability
Protection against data loss
multiple drives working in parallel increase system performance
A disk system with RAID capability can protect its data and provide on-line, immediate access to its data, despite a single disk failure (some RAID storage systems can withstand two concurrent disk failures). RAID capability also provides for the on-line reconstruction of the contents of a failed disk to a replacement disk.
RAID offers faster hard drive performance and nearly complete data safety. Storage requirements are expanding as file sizes get bigger and rendering needs get more complex. If you handle very large images or work on audio and video files, faster data throughput means enhanced productivity. RAID can be backed up to tape while the system is in use.
There are 5 most commonly used RAID levels. These levels are not ratings, but rather classifications of functionality. Different RAID levels offer dramatic differences in performance, data availability and data integrity depending on the specific I/O environment. There is no single RAID level that is perfect for all users.
Storage Requirements can be calculated through RAID Calculator.

RAID 0: STRIPING
RAID 0 refers to striping data across multiple disks without any redundant information. Data is divided into blocks and distributed sequentially among the disks. This level is also referred to as pure striping. The number of disk drives needed to create a RAID 0 is one or more. In other words, a single drive can be configured as a RAID 0 array. This type of array can be used to enhance performance in either a request rate intensive or transfer rate intensive environment. Unfortunately, striping reduces the level of data availability since a disk failure will cause the entire array to be inaccessible.

RAID 0 was not defined originally but has become a commonly used term.

Advantages:
Easy to Implement
No capacity loss – all storage is usable

Disadvantages:
Not a “true” RAID due to the lack of fault-tolerance
Failure of only one disk will result in loss of all data on the array
RAID 1: MIRRORING / DUPLEXING
RAID 1 is the first defined level that allows a measure of data redundancy. Data written to one disk drive is simultaneously written to another disk drive. If one disk fails, the other disk can be used to run the system and reconstruct the failed disk. Since the disk is mirrored, it does not matter if one of them fails because both disks contain the same data at all times.
RAID level 1 provides high data availability since two complete copies of all information are maintained. In addition, read performance may be enhanced if the array controller allows simultaneous reads from both members of a mirrored pair. Higher availability will be achieved if both disks in a mirror pair are on separate I/O busses, known as duplexing.

Advantages:
Higher read performance than a single disk

Disadvantages:
Requires twice the desired disk space
RAID 3: SRTIPING AND PARITY
In RAID 3, data is striped across a set of disks. In addition, parity is generated and stored on a dedicated disk. With RAID 3, data chunks are much smaller than the average I/O size and the disk spindles are synchronized to enhance throughput in transfer rate intensive environments. RAID 3 is well suited for CAD/CAM or imaging type applications as well as streaming media. Since parity is used, a RAID 3 stripe set can withstand a single disk failure without losing data or access to data.
Advantages:
Good data availability
High performance for transfer rate intensive applications
Cost effective – only 1 extra disk is required for parity

Disadvantages:
Poor random I/O performance
Disk failure has a significant impact on performance
RAID 5: SRTIPING AND PARITY
RAID 5, similar to level 3, stripes data and parity to generate redundancy. However, instead of requiring entirely new disk for parity storage, the parity is distributed through the stripe of the disk array.
In RAID 5 both parity and data are striped across a set of separate disks. Next, the new parity is calculated. Finally, the new data and parity are written to separate disks. Data chunks are much larger than the average I/O size, but are still resizable. Disks are able to satisfy requests independently which provides high read performance in a request rate intensive environment. Since parity information is used, a RAID 5 stripe can withstand a single disk failure without losing data or access to data.

Advantages:
Highest read data transaction rates
Cost effective – only 1 extra disk is required

Disadvantages:
Individual block data transfer rate same as a single disk.
RAID 10
RAID 10 is technically (RAID 1 + RAID 0), a combination of RAID 1 and 0 – mirroring and striping, but without parity. RAID 10 is a stripe across a number of mirrored drives. It is implemented as a striped array whose segments are RAID 1 arrays. RAID 10 has the same fault tolerance as RAID level 1, as well as the same overhead for fault-tolerance as mirroring alone.

Advantages:
Very high I/O rates are achieved by striping RAID 1 segments
Excellent solution for sites that would normally use RAID 1
Great for Oracle and other databases which need high performance and fault tolerance.

Disadvantages:
Expensive to maintain
As with Raid 1 total capacity is equal to half of the total capacity of all disk in the array.