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Best Data Recovery Raid Software

Best Data Recovery Raid Software

RAID (originally redundant array of inexpensive disks; now commonly redundant array of independent disks) is a data storage virtualization technology that combines multiple disk drive components into a logical unit for the purposes of data redundancy or performance improvement.

The term “RAID” was invented by David Patterson, Garth A. Gibson, and Randy Katz at the University of California, Berkeley in 1987

Data is distributed across the drives in one of several ways, referred to as RAID levels, depending on the specific level of redundancy and performance required. The different schemes or architectures are named by the word RAID followed by a number (e.g. RAID 0, RAID 1). Each scheme provides a different balance between the key goals: reliability, availability, performance, and capacity. RAID levels greater than RAID 0 provide protection against unrecoverable (sector) read errors, as well as whole disk failure.

RAID levels

RAID 0
RAID 0 consists of striping, without mirroring or parity. The capacity of a RAID 0 volume is the sum of the capacities of the disks in the set, the same as with a spanned volume. There is no added redundancy for handling disk failures, just as with a spanned volume. Thus, failure of one disk causes the loss of the entire RAID 0 volume, with reduced possibilities of data recovery when compared to a broken spanned volume. Striping distributes the contents of files roughly equally among all disks in the set, which makes concurrent read or write operations on the multiple disks almost inevitable. The concurrent operations make the throughput of most read and write operations equal to the throughput of one disk multiplied by the number of disks. Increased throughput is the big benefit of RAID 0 versus spanned volume.

RAID 1
RAID 1 consists of mirroring, without parity or striping. Data is written identically to two (or more) drives, thereby producing a “mirrored set”. Thus, any read request can be serviced by any drive in the set. If a request is broadcast to every drive in the set, it can be serviced by the drive that accesses the data first (depending on its seek time and rotational latency), improving performance. Sustained read throughput, if the controller or software is optimized for it, approaches the sum of throughputs of every drive in the set, just as for RAID 0. Actual read throughput of most RAID 1 implementations is slower than the fastest drive. Write throughput is always slower because every drive must be updated, and the slowest drive limits the write performance. The array continues to operate as long as at least one drive is functioning.

RAID 2
RAID 2 consists of bit-level striping with dedicated Hamming-code parity. All disk spindle rotation is synchronized and data is striped such that each sequential bit is on a different drive. Hamming-code parity is calculated across corresponding bits and stored on at least one parity drive.[9] This level is of historical significance only; although it was used on some early machines (for example, the Thinking Machines CM-2),[15] as of 2014 it is not used by any of the commercially available systems.

RAID 3
RAID 3 consists of byte-level striping with dedicated parity. All disk spindle rotation is synchronized and data is striped such that each sequential byte is on a different drive. Parity is calculated across corresponding bytes and stored on a dedicated parity drive.[9] Although implementations exist,[17] RAID 3 is not commonly used in practice.

RAID 4
RAID 4 consists of block-level striping with dedicated parity. This level was previously used by NetApp, but has now been largely replaced by a proprietary implementation of RAID 4 with two parity disks, called RAID-DP.

RAID 5
RAID 5 consists of block-level striping with distributed parity. Unlike in RAID 4, parity information is distributed among the drives. It requires that all drives but one be present to operate. Upon failure of a single drive, subsequent reads can be calculated from the distributed parity such that no data is lost. RAID 5 requires at least three disks.[9] RAID 5 is seriously affected by the general trends regarding array rebuild time and chance of failure during rebuild.[19] In August 2012, Dell posted an advisory against the use of RAID 5 in any configuration and of RAID 50 with “Class 2 7200 RPM drives of 1 TB and higher capacity” for business-critical data.

RAID 6
RAID 6 consists of block-level striping with double distributed parity. Double parity provides fault tolerance up to two failed drives. This makes larger RAID groups more practical, especially for high-availability systems, as large-capacity drives take longer to restore. As with RAID 5, a single drive failure results in reduced performance of the entire array until the failed drive has been replaced.[9] With a RAID 6 array, using drives from multiple sources and manufacturers, it is possible to mitigate most of the problems associated with RAID 5. The larger the drive capacities and the larger the array size, the more important it becomes to choose RAID 6 instead of RAID 5.[21] RAID 10 also minimizes these problems.

Best Recovery Software

For successful data recovery it’s essential to choose the right software. A useful list of most famous data recovery software.

Stellar Phoenix Windows Data Recovery

Fend off data loss with this immaculate Windows data recovery solution. The software comes as a rescuer in times when your precious photos, music, videos, documents, and other files get deleted accidentally or in a frenzy to free up storage.

Find more at: http://www.stellarinfo.com/

Virtual Lab

Regardless of the reason for data loss, accidental format, damaged partition, virus attack, deleted files, even a formatted hard drive, VirtualLab Data Recovery software does the job! VirtualLab is incredibly easy to use, yet so powerful and robust that it is used daily by data recovery companies world-wide. Works with all Windows operating systems, from Windows 98 to Windows 8, FAT 12/16/32 and NTFS file-systems. Forget having to use different software versions for different recoveries, VirtualLab does it all in one

Find more at: https://www.datarecoverysoftware.net

Data Recovery Wizard Free

EaseUS Data Recovery Wizard Free is the best free data recovery software to solve all data loss problems – recover lost files from hard drive, external hard drive, USB drive, Memory card, digital camera, mobile phone, music player and other storage media due to deleting, formatting, software crash, hard drive damage, virus attacking, partition loss or other unknown reasons. Only three steps and a few clicks to get whatever you lost back!

Find more at: http://www.easeus.com/

GetDataBack Simple

The simplest Data Recovery Software ever. Lightning fast, for FAT and NTFS. You can recover it now. GetDataBack Simple’s user interface is so simple, it enables even the most inexperienced users to conduct their own data recovery with just one click. Our developers have combined decades of data recovery experience with the newest technologies. GetDataBack Simple recovers files from Windows drives when the data is no longer accessible due to formatting, partitioning, virus attack, power or software failure.

Find more at: https://www.runtime.org

MiniTool Power Data Recovery Free Edition

Power Data Recovery is a professional File Recovery Software and Data Recovery Software. Power data recovery software could help you recover all your data no matter the data is lost by accidental deletion, format, re-partition, system crash or virus attack.
Find more at: http://www.powerdatarecovery.com/

File Scavenger – Data Recovery Utility

File Scavenger® Version 4 is a file “undelete” and data recovery utility for Windows® 8, 7, Vista, Server 2003, XP and 2000. File Scavenger® can recover files that have been accidentally deleted (including files removed from the Recycle Bin, in a DOS window, from a network drive, from Windows Explorer with the SHIFT key held down) provided that recovery is attempted before the files are permanently overwritten by new data. File Scavenger® supports both basic and dynamic disks, NTFS compression, alternate data streams, sparse files, Unicode filenames, etc. Except in severe cases, both the file and the folder path leading to the file can be recovered.

Find more at: http://www.quetek.com/

iRecover – Recover data from just about anything

iRecover is the most complete data recovery program available. In addition to outstanding recovery capabilities, it offers everything a data recovery engineer could ask for: two-pass disk cloning (with reverse cloning), a disk viewer that interprets disk structures, automatic RAID0 and RAID5 parameter detection and access to S.M.A.R.T. data to review a disk’s physical status.

Find more at: http://www.diydatarecovery.nl/

By Andrea Tonin|Server|Commenti disabilitati

Best Data Recovery Raid Services

Best Data Recovery Raid Services

What Causes RAID Data Corruption?

Hard drive failures are relatively common despite significant advances in HDD technology. According to some manufacturers, about 1-2 percent of hard drives fail each year, and the average lifespan for a hard disk is anywhere from 3 to 7 years depending on the drive’s features and specifications.

There are two major types of HDD failures: physical failures, which include read/write head crashes and other mechanical or electrical damage, and logical failures, which include data corruption, accidental file deletion and other non-mechanical issues.

Data corruption is fairly uncommon on most RAID arrays thanks to a number of safeguards that protect against common sources of file loss. However, when corruption does occur due to logical or physical issues, RAID users often face serious consequences.

Some of the most common causes of RAID file corruption include:

– Virus Damage
– Physical Media Failures
– Controller Issues
– Sudden Power Outages and Electrical Events
– Software Errors and Malfunctions

Best 10 Data Recovery Raid Services

http://www.securedatarecovery.com/

http://www.salvagedata.com/

http://www.werecoverdata.com/

https://gillware.com/

http://www.datarecovery.net/

http://dtidatarecovery.com/

http://www.datatechlab.com/

https://www.datamechanix.com

http://www.thedatarescuecenter.com/

http://www.krollontrack.com/

By Andrea Tonin|Server|Commenti disabilitati

Top 10 Best Free Online Conference Call Services

Top 10 Best Free Online Conference Call Services

A conference call is a telephone call in which the calling party wishes to have more than one called party listen in to the audio portion of the call. The conference calls may be designed to allow the called party to participate during the call, or the call may be set up so that the called party merely listens into the call and cannot speak. It is sometimes called ATC (Audio Tele-Conference).

Conference calls can be designed so that the calling party calls the other participants and adds them to the call; however, participants are usually able to call into the conference call themselves by dialing a telephone number that connects to a “conference bridge” (a specialized type of equipment that links telephone lines).

Top 10 Best Free Online Conference Call Services

1. Skype

Skype is a best and most popular software that enables you to make free calls anywhere in the world. Skype is a free VOIP (voice over IP – which means you talk through the internet). You can easily join Skype, download their software onto your computer, and invite others to join. Skype also provides low-cost unlimited calling plans to land-lines and cell phones around the world. Now you can add up-to 10 person in a video conference that’s is really a plus point .

2. GoToMeeting

Goto meeting is a online free call conference tool that allows you to meet online rather than in a conference room. You can hold as many meetings as you want–no overages or hidden charges. Phone conferencing and VoIP is included. You can go for Free Trial
30 days of unlimited meetings with up to 15 attendees. Go to meeting conference call software is compatible for both mac and pc .

3. SightSpeed

Sightspeed brings you the world’s best video and voice calling service for both Mac and PCs, unlimited free PC – PC video calls. Reduced rates for PC – land-line / cell phone calls. Mac users can connect with full quality to Windows users, and vice versa.

4. Free conference calling
Free conference calls with a conferencing service equipped for 500 callers per conference call. Time period is up to six hours of conference time for each call. It also provides free Recording of your conference call for easy reference and playback via MP3. Listen, download and podcast easily.

5. Dimdim

Dimdim conference call service is an easy, open, affordable online meetings and webinars. Collaborate and share with no downloads required to host or attend. Mac, Windows, or Linux. Video conferencing is very easy to start-up. No installation required.With one-click audio, video and screen sharing and instant meeting capabilities.You can use the Free Trialthat lasts for 30 days.

6. Tokbox

Group video conferencing made simple. Connect face to face with 2 to 200 people. No fuss. No download. 20 to 25 people on the video conferencing is recommended. Tokbox aims itself clearly at the free consumer videoconferencing market.

7. MyMeeting123

It is Fast and easy, requires no extra equipment to host. MyMeeting123 offers both live web meetings and conference calling for users. They offer multiple plans to fit your needs, a 14-day money back guarantee, You can go for Free Trial: 14 days of unlimited meetings restricted to the plan you choose.

8. Paltalk

It allows you to make free video calls with up to 10 friends on Paltalk, AIM, ICQ and Yahoo Messenger. Free accounts only can open Webcams for a few seconds, while paid users can open multiple video windows.After that, you can still hear but not see the person

9. MegaMeeting

Mega meeting provides Web and video conferencing software for online meetings that helps to reduce travel related costs, extends your marketing reach, browser based and offers online conferencing with true VoIP audio, text chat and no long term contracts, it is compatible with : Windows, Mac, Linux. You can go for Free Trialthat lasts for 30 days.

10. Fuze Meeting

It offers online meetings in HD, login and upload your content in order to start a meeting. This conference call service has a great video tool that can display a variety of video file types including HD video. Video can be forwarded and backed up, you can also zoom in and add text, arrows, shapes and notes to the video. This service can display FLV, MOV, WMV and MP4 type video files.

By Andrea Tonin|Web Business|Commenti disabilitati

Web Business – Virtual Data Rooms

A virtual data room (sometimes called a VDR) is an online repository of information that is used for the storing and distribution of documents. In many cases, a virtual data room is used to facilitate the due diligence process during an M&A transaction, loan syndication, or private equity and venture capital transactions. This due diligence process has traditionally used a physical data room to accomplish the disclosure of documents. For reasons of cost, efficiency and security, virtual data rooms have widely replaced the more traditional physical data room.

Technically speaking is a series of proprietary extranets that provide an online repository of data. Businesses typically use a secure virtual data room to share critical information with external customers and partners in a secure, online environment. The Virtual Data Room enables parties to view documents relevant to a particular transaction for authorized users. Documents are stored in electronic format on a central server and accessed via the Internet.

Benefits of a virtual data room

The largest financial benefits accrue to the seller although buyers also benefit. For the former, advantages include:

– Improvement in the number of bidders, opening the sale up to more bidders and therefore potentially better sale prices.[1]
– Increased bid throughout (and time zone access) if the virtual data room is accessible 24/7 over the allowed period.[2]
– Increased control and understanding of bidders.
– Reduced cost of the due diligence process overall by eliminating the need to travel, copy multiple physical binders and rent several dedicated physical due diligence rooms.[1]
– Resulting 20%-30% higher bid values.[citation needed]
– Usually more cost effective than physical data rooms.[3]
– Increased speed of transactions owing to improved accessibility.
– Enhanced information secures more deals at higher prices.[citation needed]
– Conventional physical data rooms restrict the bidder or buyers’ ability to get the correct people to the room simply due to the physical location. However, Virtual Data Room opens up global markets for M&A, takeovers and property deals compared with purely face-to-face and hardcopy document transactions (i.e. business letters).
– Information cannot be downloaded and taken away in a true Virtual Data Room – only viewed by a user with the correct permissions.

There are hundreds of virtual data room vendors active in the market, the most popular are:
Ansarada
Box
CapLinked
EthosData
Firmex
HighQ
Huddle
iDeals
Intralinks
Imprima
Merrill Datasite
Millnet
OneHub
RR Donnelley
SecureDocs
ShareVault
V-Rooms

By Andrea Tonin|Web Business|Commenti disabilitati