Linux supports various file systems like Ext2, Ext3 again ReiserFS. The latter two file systems support file system journaling, hence are less prone to file system corruption (as compared to Ext2) due to unexpected shutdown.  Visit here now http://harddrive-datarecovery-fat32.blogspot.com

Besides, unexpected contour shutdown, other causes that could corrupt these file systems are unreasonable use of terminal commands, insufficient disk resources, user errors etc. lastingness such situations, you cannot way your stored data and to revivify it, you should use your growing data backup. But if backup suffers errors or you find it non-existent, dream of your hard rush using interrogatory binge Linux reclamation applications.As a practical example, when you start your Linux-based system, you might receive the following error message:“ contains a string system with errors, check forced”You get another blunder message describing that you should run fsck manually.Cause

You discharge this file system error message if one or supplementary treacherous data structures are corrupted or umbrageous. Linux file systems are comprised of data structures like, superblock, inode, extents, drainpipe groups, and block bitmap etc, If item of these data structures close corrupt, you get errors rejoice in above.Solution

You should follow these steps to recover from relating situations:

• You need to champion boot your formation using Linux CD

• Enter the root password to enter into the terminal, when prompted thanks to. It is recommended to enter consequence single user mode

• Run fsck on the affected partition blot out syntax: fsck

• Reboot the mode

• If you civil receive the same error message and chain system is corrupt, you should recreate the string system by reformatting the hard disk. Formatting deletes whole-hog data, thus prosperity your rest backup to restore.After reformatting the hard disk, if you observe that intelligence backup is damaged, not available or not updated, you need to use commercial Data Recovery Linux instruments. These are specific applications that cream powerful scanning algorithms to examine the logically crashed drives. With annotate diacritic design besides self-descriptive interface, these Linux compensation software sign you to complete harmless and interactive recovery. You can use them ascendancy helping logical data loss case.Stellar Phoenix Linux Data Recovery is an advanced cure to boost besides restore adrift data. It provides charismatic recovery features such as Disk Imaging, Append Header, RAW File compensation further others. This Linux tip-off atonement software is compatible with almost all Linux distributions including very warm Hat, SlackWare, Turbo Linux, Mandrake, SUSE, Gentoo, Fedora etc. Visit here now http://harddrive-datarecovery-fat32.blogspot.com

©2012 Parkzone Corsair. All Rights Reserved.

Power strips available to buy in Britain vary from cheap white plastic versions imported en mass, normally from China to commercial, top-of-the range, metal-encased strips that are designed to fit into 19″ rack cabinets primarily used in data centres and on server farms.

Cheap power strips can certainly do the job and for domestic use (e.g. running a home entertainment system) they are probably the best option, definitely in terms of cost if not reliability. But, when used in a commercial environment such as a data centre, where there are usually hundreds of such strips providing power to a range of servers and other electrical machinery, reliability is the measure that is valued over cost.

If power strips installed in a commercial environment kept fusing or otherwise malfunctioning, just because they were cheap, it would be unacceptable. Indeed, the downtime resulting from such a strategy could be catastrophic in terms of both a loss of core business and also for the future of the data centre manager’s employment prospects!

Of course, it doesn’t always follow that the most expensive power strips will be the best, but like most things in life you tend to get what you pay for and for those seeking reliability, performance and guarantees it comes at a price. But, rather than install power strips that display no indication of their performance, data centre managers are increasingly turning to units that incorporate remote KWh monitoring with environmental monitoring.

Such units are capable of monitoring power (i.e. Volts/Amps/Power Factor) and energy use and logging the results remotely. In addition, the environment in which they are operating can also be monitored due to external sensors fitted to the unit, thus allowing users to see if there are any power spikes or troughs on the unit or in its surroundings.

Such intelligence when it comes to operating power strips is considered essential by experienced data centre managers, the majority of whom would not approve the fitting of power strips without some monitoring capability. Remote monitoring is even better as it allows the manager to be able to keep track of such units within the data centre by logging into a browser, via an in-built HTTP server. Alternatively and additionally the unit’s performance can be viewed and logged through a building or network management system using SNMP, or even imported directly into a SQL database using XML data output.

With such features available the higher cost of buying remote KWh monitoring power strips pays back for itself many times over in terms on increased efficiency, keeping both the company and subsequently, the data centre manager extremely happy!

©2012 Parkzone Corsair. All Rights Reserved.

©2012 Parkzone Corsair. All Rights Reserved.

 

This is due, in part, to server sprawl as well as a lack of consolidation between procurement, application management and energy use. But even with a complete change around in management data centres still need to elevate power generation and protection further up the boardroom agenda as their businesses, and those of their customers, rely so heavily on power continuity.

 

Data centre power protection must focus on availability, redundancy, resilience and serviceability with uninterruptible power supplies at the centre and as the bridge between mains power and standby power (whether a diesel generator, fuel cell or other source).

 

The most important first step towards uninterrupted power is to categorise loads into critical, essential and non-essential and then size those that warrant UPS protection in terms of their energy use. Critical loads (IT infrastructure, servers, networks, routers and so forth) are those that the business simply cannot function without. They will require UPS protection and redundancy and may even warrant extended runtime. Essential loads (heating and emergency lighting, for example) are those that do not necessarily directly affect business continuity but which may be required for health & safety reasons. They may need UPS protection to ensure their continuity until generator start-up but may not require redundancy. Non-essential loads (printers, canteen facilities) can be temporarily lost in a power failure and do not require any form of UPS protection.

 

Sizing uninterruptible power supplies can be tricky. If it is significantly oversized it will run inefficiently and cost more to install. Conversely, ‘undersizing’ will introduce the risk of system overloads. Whilst an on-line uninterruptible power supply has a built-in automatic bypass for emergencies, running close to design limits with regular overloads is bad practice.

 

UPS Sizing: understanding the importance of ‘real power’ is crucial for power protection sizing. Kilowatts (kW) are a measure of the real power drawn by the load whereas kilovolt-amps (kVA) are a measure of apparent power. The difference between the two is the power factor (pf) and its size presents challenges when specifying UPS.

 

The greatest efficiency comes from operating at a power factor of 1.0 or ‘unity’. An uninterruptible power supply, with as high an output power factor as possible, should be specified. A power factor of 0.9 is the standard set by reputable UPS manufacturers like Riello UPS.

 

Power protection systems should consist of units offering an input power factor of not less than 99%, enabling users to cut energy wastage. Today’s UPS should offer a small footprint so as not to take up too much valuable revenue-earning rack space.

 

An online or double conversion UPS is recommended for the protection of critical telecom or data centre loads. The inverter (which is powered when mains supply is present from a rectified mains supply) continuously powers the load from the UPS battery when mains power fails. The transfer from mains to battery is seamless with no break in supply, which is critical for this type of installation.

 

Various UPS configurations are available including single, parallel and series-redundant with each resulting in a different level of resilience, MTBF (meantime-between-failure) and availability.

 

Resilience is built into the UPS in the form of an automatic static transfer switch. A sensor monitors the output waveform of the inverter. Should the inverter fail due to short-circuit, overload or fault condition, the static switch transfers the load to mains without a break.

 

Planning for the Future: data centre loads are not static and will be under constant change and adaptation throughout the life of the facility. A graduated ‘growth model’ needs to be conceptualized at the outset to allow for future expansion of power protection equipment.

 

UPS Monitoring and Maintenance: the advent of Html capability in the software arena has enabled modern UPS manufacturers to integrate sophisticated onsite and remote monitoring capability within their hardware. In fact, modern systems enable remote 24/7 monitoring (either by the client or at the manufacturer’s facility) of all critical UPS, generator, air-conditioning and fire suppression equipment.

 

Nowadays, modern UPS systems, attached to mission critical equipment, have an internal or external maintenance bypass, which allows servicing to be carried out without having to shut down the whole network and lose vital productivity. Proper maintenance, carried out in a timely and effective manner, can prolong the life of the UPS, increase its effectiveness and achieve a better return on investment.

 

Power protection is vital for today’s data centres and UPS providers like Riello are specifically designing products to suit the needs and constraints of this type of installation. For more information about designing, installing and operating power protection systems read The Power Protection Guide.

©2012 Parkzone Corsair. All Rights Reserved.

Both NOR and NAND Flash memory were invented by Dr. Fujio Masuoka from Toshiba in 1984.The name ‘Flash’ was suggested because the erasure process of the memory contents resembles a flash of a camera, and it’s name was coined to express how much faster it could be erased “in a flash”. Dr. Masuoka presented the invention at the International Electron Devices Meeting (IEDM) held in San Jose, California in 1984 and Intel recognizes the potentiality of the invention and introduced the first commercial NOR type flash chip in 1988, with long erase and write times.

Flash memory is a form of non-volatile memory that can be electrically erased and rewrite, which means that it does not need power to maintain the data stored in the chip. In addition, flash memory offers fast read access times and better shock resistance than hard disks. These characteristics explain the popularity of flash memory for applications such as storage on battery-powered devices.

Flash memory is advance from of EEPROM (Electrically-Erasable Programmable Read-Only Memory) that allows multiple memory locations to be erased or written in one programming operation. Unlike an EPROM (Electrically Programmable Read-Only Memory) an EEPROM can be programmed and erased multiple times electrically. Normal EEPROM only allows one location at a time to be erased or written, meaning that flash can operate at higher effective speeds when the systems using; it reads and writes to different locations at the same time.

Referring to the type of logic gate used in each storage cell, Flash memory is built in two varieties and named as, NOR flash and NAND flash. Flash memory stores one bit of information in an array of transistors, called “cells”, however recent flash memory devices referred as multi-level cell devices, can store more than 1 bit per cell depending on amount of electrons placed on the Floating Gate of a cell. NOR flash cell looks similar to semiconductor device like transistors, but it has two gates.

First one is the control gate (CG) and the second one is a floating gate (FG) that is shield or insulated all around by an oxide layer. Because the FG is secluded by its shield oxide layer, electrons placed on it get trapped and data is stored within. On the other hand NAND Flash uses tunnel injection for writing and tunnel release for erasing.

NOR flash that was developed by Intel in 1988 with unique feature of long erase and write times and its endurance of erase cycles ranges from 10,000 to 100,000 makes it suitable for storage of program code that needs to be infrequently updated, like in digital camera and PDAs. Though, later cards demand moved towards the cheaper NAND flash; NOR-based flash is hitherto the source of all the removable media.

Followed in 1989 Samsung and Toshiba form NAND flash with higher density, lower cost per bit then NOR Flash with faster erase and write times, but it only allows sequence data access, not random like NOR Flash, which makes NAND Flash suitable for mass storage device such as memory cards. SmartMedia was first NAND-based removable media and numerous others are behind like MMC, Secure Digital, xD-Picture Cards and Memory Stick. Flash memory is frequently used to hold control code such as the basic input/output system (BIOS) in a computer. When BIOS needs to be changed (rewritten), the flash memory can be written to in block rather than byte sizes, making it simple to update.

On the other hand, flash memory is not practical to random access memory (RAM) as RAM needs to be addressable at the byte (not the block) level. Thus, it is used more as a hard drive than as a RAM. Because of this particular uniqueness, it is utilized with specifically-designed file systems which extend writes over the media and deal with the long erase times of NOR flash blocks. JFFS was the first file systems, outdated by JFFS2. Then YAFFS was released in 2003, dealing specifically with NAND flash, and JFFS2 was updated to support NAND flash too. Still, in practice most follows old FAT file system for compatibility purposes.

Although it can be read or write a byte at a time in a random access fashion, limitation of flash memory is, it must be erased a “block” at a time. Starting with a freshly erased block, any byte within that block can be programmed. However, once a byte has been programmed, it cannot be changed again until the entire block is erased. In other words, flash memory (specifically NOR flash) offers random-access read and programming operations, but cannot offer random-access rewrite or erase operations.

This effect is partially offset by some chip firmware or file system drivers by counting the writes and dynamically remapping the blocks in order to spread the write operations between the sectors, or by write verification and remapping to spare sectors in case of write failure.

Due to wear and tear on the insulating oxide layer around the charge storage mechanism, all types of flash memory erode after a certain number of erase functions ranging from 100,000 to 1,000,000, but it can be read an unlimited number of times. Flash Card is easily rewritable memory and overwrites without warning with a high probability of data being overwritten and hence lost.

In spite of all these clear advantages, worse may occur due to system failure, battery failure, accidental erasure, re-format, power surges, faulty electronics and corruption caused by hardware breakdown or software malfunctions; as a result your data could be lost and damaged.

Flash Memory Data Recovery is the process of restoring data from primary storage media when it cannot be accessed normally. Flash memory data recovery is a flash memory file recovery service that restores all corrupted and deleted photographs even if a memory card was re-formatted. This can be due to physical damage or logical damage to the storage device. Data even from damage flash memory can be recovered, and more than 90% of lost data can be restored.

©2012 Parkzone Corsair. All Rights Reserved.

Saturday, April 03, 2010;

Memory stick data retrieval application recovers lost pen drive folders, music, audio-video files, photo, digital images, snaps from USB drive storage media. Thumb drive data rescue software is working as powerful USB recovery tool to get back lost or deleted data from formatted thumb drive, USB drive, flash drive, compact drive, smart drive and pen drive. Pen drive file salvage program has advanced graphical user interface (GUI) which is user friendly and restores thumb drive files even files deleted from pen drive by using Shift + Delete key.

USB drive image recovery software restores formatted pictures, mp4 songs, important documents, movies folders. Kingston pen drive data rescue utility recovers various types of files, folders including compressed, encrypted documents, zip files from quickly formatted memory stick. Thumb drive data retrieval tool restores audio, image files in all major formats like bmp, mov, jpeg, tiff, mp3, mpeg, wav etc. USB drive music salvage application supports all major brands of memory stick including Kingston, Transcend, Nikon, Super Flash, Sony, Corsair, Samsung and many more.

User can get more idea about software from the following site link:

http://www.data-recovery-usb-drive.com/usb-drive/pen-drive-data-recovery.html

Pen Drive Data Recovery Software

Thumb drive file retrieval program restores lost data due to improper usage of drive, virus/worm attack, accidental corruption, hardware/software malfunction, power failure, system shutdown etc. Memory stick data rescue application is fully compatible with all Windows operating system including 98, ME, NE, 2000, server 2003, NT, XP, Vista and Windows 7. Pen drive data recovery software shows retrieved data in tree-structure or hierarchical structure. USB drive image salvage tool recovers valuable data when error message displayed like “Drive not formatted” while accessing removable media on your laptop or desktop PC.

For customer support we’re available 24×7 hours online

Need help or got any question ask our support team?

Please contact:

Pen Drive Data Recovery (Customer Representative)

Email: usb@ddipr.com

Website: http://www.data-recovery-usb-drive.com

###

©2012 Parkzone Corsair. All Rights Reserved.

Secure USB Thumb Drives

Flash memory manufacturer Corsair says it has solved the problem of non secured flash drives by forcing you to enter a unique PIN code to enter their USB thumb drive and access your data. It’s a great idea but will it really help?

This “Flash Padlock” USB thumb drive protects file records and data with a unique PIN that you enter on the built in touchpad on the actual USB flash drive shell. You then enter the device into your USB plug on your laptop or desktop and the device operates as extra external memory. Corsair said the device is much more resistant to brute force attacks or keystroke loggers.

You see keystroke loggers record any keystroke you make on your keyboard. In other words, when you type in your password on your keyboard to unlock a secured USB thumb drive, and if a hacker has gotten a program of theirs on your device it would record your password as you type them (all of them). Every so often these keyloger programs send these simple text files via a build in e-mail program to their own e-mail inbox. This is bad!

The new Corsair device would ask that you type in your password before you plug your storage device into your computer USB flash drive port (USB port). So in essence the keylogger hacker programs would never have a chance to record your computers keystrokes and there would be no way for them to access your data.

“Featuring auto-lock hardware security, Flash Padlock is the best way to secure your data while on the go. It prevents any unauthorized access or “Brute Force” attacks to the data on the Flash Padlock. Users can program in a PIN, much like they do for an ATM machine, to lock/unlock their data. An easy to use keypad in conjunction with lock/unlock indicator lights makes the Flash Padlock easy to use. The Flash Padlock is fully plug-and-play, and requires no software or drivers to work properly.”

The Flash Padlock will auto lock after 15 seconds if removed from the computer. This ensures your data stays locked-up, if you forget to lock the device this thing does it by itself (I love things that make sense). The Flash Padlock USB storage device will work with Linux, Mac OS X and Windows based computers.

At the moment the Flash Padlock is available in 1GB and 2GB capacities starting from $29.99. For more information on this specific device visit this URL:

http://www.corsair.com/products/padlock.aspx

As we are on the topic of Corsair let’s continue. Are you a flash survivor, corsair thinks it is. “Corsair Introduces Flash Survivor — Extremely Rugged USB 2.0 Flash Drive”

Rugged USB Thumb Drives

As the owner of eProvided, a digital image recovery company which also specializes in advanced USB data recovery, we know a good idea when we see one. What this all comes down to is feedback from users that have purchased this device. If we do not see these devices come in to our labs then there is a good chance either no-one is buying them or they are not having issues of damage. The most common type of USB memory stick damage is when the USB port is broken or breaks off from the USB drive itself.

A common cause of USB thumb drive damage is from users plugging these devices into their laptop or ground based desktops and bumping the device while it is plugged in. This causes the part of the USB thumb drive that plugs into the USB slot on their computer to break off. Most of these breaks are very serious as the internal circuits and parts inside the USB thumb drive are permanently damaged. “USB Device Not Recognized” error messages may appear after such an incident.

You may also have a windows error message such as “USB Unknown Device”. This is a sign that your device has suffered serious damage to the circuitry. At this point you will need a data recovery company to assist you. Consumers need to buy devices that are more rugged and are made by larger names in the storage industry. Flash Survivor™ is an exceptionally tough, water resistant, drop-tested flash USB memory stick storage device.

A design made ideally for transporting valuable data such as personal files, jpeg images and personal applications without having to be bothered by the chance for damage or loss of data due to various natural elements.

So use your noggin and buy strong devices and keep the contact information of those who may be able to help you in case of data loss on USB thumb drives. This story is brought to you at no charge (Smiling) so please bookmark our site (http://www.eprovided.com) and send this story to a friend right now.

©2012 Parkzone Corsair. All Rights Reserved.

If you’re planning to have memory stick data recovery then must be aware of features and specifications. So features of memory stick data recovery are retrieves corrupted files and folders damaged due to human error or any virus generated data loss , provides full data retrieval support both by Microsoft Windows and Apple Macintosh OSX, this utility is considered as the easiest data retrieval software to restore lost data, recover formatted or damaged files before you fix and repair your corrupted storage device, and supporting all type of memory stick including Apacer, Kingmax, Lexar, Kingston, Transcend, Nikon, Super Flash, Sony, Fujifilm, Corsair, Samsung etc.

©2012 Parkzone Corsair. All Rights Reserved.

On receiving the ERDY, the host resumes communications with the endpoint. An IN endpoint is in the flow control condition after responding to an ACK Transaction Packet with either of the following A NRDY Transaction Packet. A Data Packet with the End of Burst (EOB) field set to 1, indicating that the packet is the last in a burst. The device sets EOB if the data payload is equal to the endpoint’s maximum packet size and the endpoint is returning fewer than the number of packets requested in the previous ACK Transaction Packet.

An OUT endpoint is in the flow control condition on responding to a Data Packet with either of the following A NRDY Transaction Packet. An ACK Transaction Packet with the NumP field set to zero, indicating that the endpoint can’t accept any Data Packets. Hosts retain the option to attempt communications with bulk endpoints in the flow-control condition before receiving ERDY.

©2012 Parkzone Corsair. All Rights Reserved.

Both the sender and receiver keep track of the data toggle. Host controllers handle data toggles at a low level that is invisible to applications and device drivers. Some device controller chips handle the data toggles completely in hardware, while others require some firmware control. If you’re debugging a device where the correct data is transmitting on the bus but the receiver is ignoring or discarding the data, chances are good that the device isn’t sending or expecting the correct data-toggle value.

When the host configures a device on power up or attachment, the host and device each set their data toggles to DATA for all except some high-speed isochronous endpoints. On detecting an incoming data packet, the host or device compares the state of its data toggle with the received data toggle. If the values match, the receiver toggles its value and returns an ACK handshake packet. The ACK causes the sender to toggle its value for the next transaction.

©2012 Parkzone Corsair. All Rights Reserved.