By jerkytom May 21, 2013
I want to thank the staff and directors of the company for the human attitude. Unlike most of the firms that become indifferent to the customer after receiving the money, they are really caring and pay attention to every single detail. ...read more
By chamberlyn23 May 21, 2013
Many thanks to the company for the recovery of data from my hard drive. The work is absolutely correct and was done in just a few hours. The real professionals I'm happy to recommend. ...read more
By LukaMil May 13, 2013
When my drive started making weird clicking noises, Id thought for sure that Id lost all my digital family pictures, but DataRetrieval.com fortunately proved me wrong! Had the pictures back to cherish in just a matter of days! ...read more
Theessence of computerhas changed a lot during the last decade, but not all bottlenecks have been removed from it. One of such bottlenecks is ahard drive. Its because of it thatoperating systemoften cannot boot from a cold start for 10 seconds. There isSSD, but using it as main storage is difficult due to small capacity. So it means that SSD cannot crack the modernarchitecture: there is slow storage and fast random-access memory.Random-access memory is fast and yet it is volatile.Hard driveissecure,non-volatile, but slow. In its turn, SSD is both faster than hard drive andnon-volatile. In future, SSD (or its successor) is simply obliged to replace both random-access memory andhard drive. As of now one can essentially speed up computer with the help ofSSD. SSD is not a rarity any more and can be frequently seen inhome computers. Users often create a system volume on it, install OS andheavy software(they say that even Photoshop runs like crazy on it) and keep on storing music and movies onhard drives.Inservers, whenfast databasework is required, you can order SSD as carrier and after doing that databases becomelive. Until there is no space left on SSD. Then users order cunningRAID arraysor collect clusters.In 2011 Intel company presented to those in need for speed a technology calledSmart Response Technology(SRT), that uses SSD as caching buffer between RAM andhard drive. You can use SSD with capacity up to 64Gb, and not the files are being cached, but accessedlogical blocksfrom hard drive and if SSD is suddenly filled up, then cells that have not been accessed for a long time period will start filling in withnew data. This SRT works likeLinuxworks withRAM. So now everything is clear with reading. In case of writing things are far more interesting and there aretwo usage modes: fastest possible and expanded. In expanded mode the data is written simultaneously to both SSD andhard drive. This mode is slower than the former but is reliable and guarantees that data will be saved on hard drive whatever happens. Naturally, data is saved to SSD at the next accessing, system receives themvery fast. In optimized forspeed modedata is first saved to SSD and then tohard drivewith a certain delay, whenever it is convenient (called ‘lazy writing’). In this mode the speed of saving data is only limited by thewriting speedto SSD, but data integrity is not guaranteed — there is a chance of power supply failure during the writing process (which is not relevant for laptops) or, all of a sudden, SSD crashes, in this case part of data that was not written to hard drive will be lost. The behaviour of this mode reminds me of Redis: fast, smart and secure enough, but has to be used very carefully.Caching is realized viaRAID array, in which you need to add hard drive and SSD in BIOS and you need to clearly specify SSD as acaching device. Such option is in BIOS on motherboards with chip setZ68.You need only to turn on caching in BIOS and then immediately forget how to access this scary place. Intel makes products for people and that is why caching is set in the system itself with the help of simplegraphic tool: If in the work process SSD suddenly fails, then if there were no writes in fast mode, the user won’t notice anything: SSD will fall off and everything will start working very slow, you will have a feeling of shifting from LAN to dial-up.But using only SSDread/write speedwould be a blasphemy, second huge bonus is hidden innon-volatility. It means that after rebooting data will remain in cache and if you frequently run Photoshop then it will start slow only for the first time and all other times it will start fast, even after rebooting. ...read more
By DataRetrieval Indianapolis Data Recovery Services May 21, 2013
Theessence of computerhas changed a lot during the last decade, but not all bottlenecks have been removed from it. One of such bottlenecks is ahard drive. Its because of it thatoperating systemoften cannot boot from a cold start for 10 seconds. There isSSD, but using it as main storage is difficult due to small capacity. So it means that SSD cannot crack the modernarchitecture: there is slow storage and fast random-access memory.Random-access memory is fast and yet it is volatile.Hard driveissecure,non-volatile, but slow. In its turn, SSD is both faster than hard drive andnon-volatile. In future, SSD (or its successor) is simply obliged to replace both random-access memory andhard drive. As of now one can essentially speed up computer with the help ofSSD. SSD is not a rarity any more and can be frequently seen inhome computers. Users often create a system volume on it, install OS andheavy software(they say that even Photoshop runs like crazy on it) and keep on storing music and movies onhard drives.Inservers, whenfast databasework is required, you can order SSD as carrier and after doing that databases becomelive. Until there is no space left on SSD. Then users order cunningRAID arraysor collect clusters.In 2011 Intel company presented to those in need for speed a technology calledSmart Response Technology(SRT), that uses SSD as caching buffer between RAM andhard drive. You can use SSD with capacity up to 64Gb, and not the files are being cached, but accessedlogical blocksfrom hard drive and if SSD is suddenly filled up, then cells that have not been accessed for a long time period will start filling in withnew data. This SRT works likeLinuxworks withRAM. So now everything is clear with reading. In case of writing things are far more interesting and there aretwo usage modes: fastest possible and expanded. In expanded mode the data is written simultaneously to both SSD andhard drive. This mode is slower than the former but is reliable and guarantees that data will be saved on hard drive whatever happens. Naturally, data is saved to SSD at the next accessing, system receives themvery fast. In optimized forspeed modedata is first saved to SSD and then tohard drivewith a certain delay, whenever it is convenient (called ‘lazy writing’). In this mode the speed of saving data is only limited by thewriting speedto SSD, but data integrity is not guaranteed — there is a chance of power supply failure during the writing process (which is not relevant for laptops) or, all of a sudden, SSD crashes, in this case part of data that was not written to hard drive will be lost. The behaviour of this mode reminds me of Redis: fast, smart and secure enough, but has to be used very carefully.Caching is realized viaRAID array, in which you need to add hard drive and SSD in BIOS and you need to clearly specify SSD as acaching device. Such option is in BIOS on motherboards with chip setZ68.You need only to turn on caching in BIOS and then immediately forget how to access this scary place. Intel makes products for people and that is why caching is set in the system itself with the help of simplegraphic tool: If in the work process SSD suddenly fails, then if there were no writes in fast mode, the user won’t notice anything: SSD will fall off and everything will start working very slow, you will have a feeling of shifting from LAN to dial-up.But using only SSDread/write speedwould be a blasphemy, second huge bonus is hidden innon-volatility. It means that after rebooting data will remain in cache and if you frequently run Photoshop then it will start slow only for the first time and all other times it will start fast, even after rebooting. ...read more
By DataRetrieval Indianapolis Data Recovery Services May 21, 2013
Why do you have to read this post till the end? Anyserverowner with time facesperformance issues. Sites start opening slowly,databaseinquiries take more time, waiting for application response and so forth. We can say that this is he other side ofproject development– huge page traffic, increased size of database and number of users onserver. First thing people usually do in this situation isupgrading RAMand processor, and eventually – server replacement to more expensive one. However in most cases replacing HDDs onto more efficientsolid-state drives(SSD) solves the problem with lesser expenses. What is a solid state drive? In effect,solid state drivesuse principles similar to Flash-cards but in terms of technologySSDsmoved well ahead. Modern SSD is quite a complex data storage system.Disk controllermonitors the condition, adjusts usage of different blocks to make sure that wear-out is even and also replacesbad blockswith new ones from a special reserve. The size of such area in top manufacturers can reach up to10% of the basic storage capacity. Since SSDs don’t have mechanically mobile heads no time needed to position them. Read/write speed of SDD cell is several times higher than ofHDDand transaction can occur in several flows. Absence of moving parts reduces disk overheating and hence energy consumption. Mechanical reliability of SSDs increases year by year. Theirlife cycleis still estimated on the basis of write cycles, although nowadays manufacturers guarantee at least 3 to 5 years offlawless operation. Perhaps there won’t be full conversion to SSDs in the nearest future, but area of application will definitely continue expanding. Back to data We have carried out a number of tests to compare the performance of drives based on different technologies. The participants of testing: • Server series RE4hard drivesof Western Digital.• Server hard drivesWestern Digital VelociRaptor with increased up to 10,000 RPM of spindle• Intel and Crucial SSD storage devices. The results: SSDs gained the lead in all tests, edging all the rivals. Please take note of correlations. If at read/write it was simply higher, at random read/write it was several times higher! It is an undeniable advantage since most server operations are random reads and writes. Where SSD advantages can be used? Most common option to use SSD – installing operating system to it. It considerably increases speed of all file operations.Besides OS, database servers are also very sensitive to drive performance. Using “fast” drives streamlines execution of multi aspect requests tolarge tablesanddata writesto the data base. Increased transaction reliability is also critical because data is transferred from volatile RAM to SSD in a very fast manner. High traffic websites, especially those containing large volumes of images, media files and text, benefit a lot in performance from using SSDs. Evenarchivedorrarely requestedmaterial that is not available in web-server’s cache, will be found, loaded and forwarded to user in a very fast manner. If project requires working withlarge data volumes, SSDs can also help playing the role og cache for main capacious hard drives. It will reduce load on main disk array and increase access speed tofrequently used data. More http://www.dataretrieval.com/blog/solid-state-drives/testing-hdd-velociraptor-and-ssd-as-part-of-server ...read more
By DataRetrieval Indianapolis Data Recovery Services May 20, 2013
Laptops are often the storage of personal and business information for the modern PC user. When data is compromised or lost, recovery of information can be a painful and costly process. Learning more about data recovery and understanding a few tips can help to avoid coming to the point of needing it. ...read more
Notebook computers are often harder to fix because of the size of the components and the compact design. In many cases, the problems can be resolved without requiring a technician. It is helpful to know how to diagnose and fix common problems. ...read more