Category: Data Recovery

What is the difference between SHR and RAID?

Synology Hybrid RAID or SHR, has been around for a long time now, and however it has not had the huge effect that Synology NAS’ Btrfs file system has, it is as yet an expanding well-known decision for some with regards to ensuring their equipment and their information in a Hard Drive enclosure. The two NAS and DAS use RAID as a type of security from a HDD or SSD damage and the outcomes of data misfortune that can occur. It ought to consistently be featured that both conventional RAID and SHR are NOT types of Backing up and you ought to ALWAYS have an offsite or at any rate off-system mirroring set up making constant data images and duplicates of your critical data. Be that as it may, returning to the current subject, which strategy for redundancy would it be advisable for you to consider for your capacity cluster – RAID or SHR?

What is RAID?

Huge RAID storage for file data storage arrangements RAID, or Redundant Array of Independent Disks, was initially numerous years back as a method for joining heaps of littler discs together to make a lot bigger capacity volume, with redundancy as an auxiliary need. In any case, with the enormous scale development of Hard Drives these most recent 5 years and that’s just the beginning, with Terabytes of data getting to be accessible on single discs, the essential concern of RAID has moved towards data assurance.

It is not necessarily the case that pooling little drives does not still occur, yet with drives right now is possible to purchase an 8TB such at the Seagate Archive Drive, you can perceive any reason why the motivation behind RAID in file and cold storage is increasingly about data assurance.

How does Synology SHR work and how is parity data distributed?

SHR is far more automatic RAID choice and designed for the less technically minded to protect their data from hardware failure, without having to delve to deeply into complex matters like parity and striping. It is also significantly easier to set up and considerably more scalable than traditional RAID.

It is not supported on all Synology NAS server devices but I would recommend checking in advance that your chosen Synology NAS can utilize SHR here. But otherwise if your NAS can support it, SHR arrives with a host of benefits both in terms of deployment speed and in maximum available capacity.

SHR doesn’t arrive in multiple types like RAID, but in just two different versions. SHR and SHR-2. SHR gives you the ability protect your data from 1 lost hard drive and SHR-2 protects you from two. However, the key strengths in a Synology SHR RAID setup is:
You only need two disks to build an SHR array and after that you can add drives to the Synology Hybrid RAID at any time.

In an SHR Volume, you can mix and match Hard Drives and let the calculations of the SHR layer do the work. This isn’t just at the moment of installation, but anytime you like. So, if you have for example 4 x 2TB drives in an 8-Bay enclosure and at a later date add 4x 4TB drives, not only will you be able to add these larger drives of any BRAND or speed, but also get the much, much bigger total capacity made available to you.

With an SHR RAID, regardless of the mixing of the drives, in terms of redundancy vs Capacity, you will only lose 1x the largest drive. Whereas in a RAID 5 if you mixed drives, ALL of them will be viewed and RAID’ed as the smallest available drive and you still only have redundancy for a single drive. So, in practice:
Like traditional RAID, SHR will provide you with the ability to protect your data from the loss of a single HDD or SSD. However, with SHR-2 you will be protected from losing 2 HDD or SSD.
Slightly less speed than a traditional RAID. Less than 1% difference between SHR and RAID 5, for example.

SHR vs RAID – Which is better?

And so, down to business. Now you know what SHR and RAID are, what is now important is which should you choose. Both are excellent methods of redundancy and have their own benefits. But lets take a look below at their strength and weaknesses:

SHR Strengths

  1. Faster to setup
  2. Expandable
  3. Ability to mix drives
  4. Greater available capacity when mixing drives whilst still maintaining 1 disk of redundancy
  5. If a drive fails, the Synology can still access the full volume data – though will operate much slower till a replacement drive is installed
  6. Drives can be carrier over to a new SHR supported Synology and the new NAS will see the volume and the data

SHR Weaknesses

  1. A little slower than traditional RAID but equal speed to RAID 5 and 6
  2. You cannot remove the Drives in an SHR RAID and install them in a new non-SHR NAS, they will need to be formatted.

And now onto Traditional RAID
RAID Strengths

  1. Broader options for deployment. More task specific RAID sets like RAID 10 or RAID 50 are possible
  2. Better chance of Hard Drives being recognized in a new NAS/DAS enclosure if you install them in a new unit
  3. Still scalable between RAIDs, but not as much as SHR
  4. On the whole, better Read and Write speeds available
  5. Not just limited to Synology

RAID Weaknesses

  1. You cannot effectively mix drives and to increase the total capacity will in all likelihood only be possible by replacing ALL drives in the array
  2. Cannot access the data after a drive failure until a new drive is installed (exception of RAID 1)
  3. Takes noticeably longer to create a RAID array compared with likewise SHR

RAID or SHR – The Result
Choosing between SHR and RAID on my Synology NAS with Hard Drive Media It probably won’t come as an enormous shock when I say that I recommend using SHR when using a modern Synology NAS. The benefit in the scaling options alone made it a real standout choice for me and for those who are brand faithful, you would only make it more convincing. Traditional RAID is still very relevant and very, very useful. But if you have the option to adopt SHR in your NAS setup, I urge you to do so at the point of installation.

What Happens When Hard Disk Fails in RAID 5

We are going to look at what happens when a disk happens to fails in RAID 5? How many disks can fail in RAID 5?

Raid basically means Redundant Array of Independent Disk. It’s a system that enables you to increase reliability. It allows you to combine many physical disk into an array to work as a single logical disk. i.e. this makes it possible to access the storage as a single partition in the computer/server.

Features of Raid 5

  • Striped distributed parity
  • Supports fault tolerance
  • Supports redundancy/Parity
  • Supports Hot spare options
  • It requires a minimum of 3 disks
  • It offers good performance
  • Incase a disk fails, data can still be recovered.
  • Raid 5 is very common because of the benefits it offers.

What happens when disk fails in raid 5

  • Because of redundancy, the data can be available in cases where a disk happens to fail. A spare disk can be used to reconstruct.
  • In cases where 2 disks fail, it will not be possible to access the data. You will be required to consult a data recovery company to recover the data.
  • Raid 5 can withstand losing 1 disk but not 2 or more.

What are the benefits of using raid 3 in a backup application

Definition – What is the meaning of RAID 3?

RAID 3 is a type of Raid (Redundant Array of Independent Disks) that strips the byte level and store dedicated parity bits on another distinguished drive. Just like RAID 2, RAID 3 must have a special controller that enables synchronized spinning of all the disk drives. Instead of just striping data blocks onto separate disk drives, RAID 3 stripes the bits, which are then stored on different disk drives. This type of configuration is used less often than other RAID levels.

Raid 3 Explained.

Since RAID 3 puts together striping & parity with stored parity bits on an assigned disk, this configuration involves at least 3 individual hard disks – 2 for striping data and 1 for saving parity bits. The disks must be able to spin in sync, so constant read/write (R/W) function establish good performance. However, random R/W functions may take heavy hits in performance.

In real terms, the read speed is way greater than write speeds. reason is it requires checksum calculations, which is a performance hindrance for the entire disk array.

Advantages of Raid 3 include:

  • It has high capability to transfer huge amounts of data
  • Proof against to disk failure & malfunction.

Disadvantages of Raid 3

  • Disk failing are likely to reduce.
  • Disk failures may crucially decrease output.

Can erased data be recovered?

What does Deleted File Recovery mean?


Recovering deleted files is the process of retrieving and restoring files or data that was deleted either via accident, maliciously, virus infection. This process makes it possible for the user to get their data back from their device. Devices that data can be deleted from include, server, hard drives, mobile phones, laptops, sd cards, flash disk etc.


Deleted File Recovery Explained
Deleted data recovery means recovering files that were deleted back. It can be from the recycle bin, or data lost through operating system being formatted.


In most cases, any computer storage system data is not normally deleted from the drive even after emptying the recycle bin and disk formatting. Instead, the file or data that is deleted or formatted from the storage drive removes the access to that location and marks it as available for future data storage needs.


The deleted data can still be recovered as long as new data is not overwritten on the same location. If data is overwritten, it cannot be recovered in a usable condition. When a user deletes or formats their device, its recommended that they stop using or saving new data on the device. The use should consult a data recovery expert before trying anything or purchase data recovery softwares after going through the instructions given.

How long does data recovery take?

Your computer systems happened to crash, your most valuable data is gone and you’re looking to get all your data back…if this is you then you may be asking: how long does data recovery take?


In most cases, data recovery takes approximately 3 to 5 days. However, the time it may take will depend with the issue and the extent of the damage. The data recovery engineers require to have a look at the issue and run a diagnostic on it.

This will help determine the estimated time of recovery.
In short, how long the data recovery process will take will depend on many factors and issues that are involved in the recovery. Here are a list of some of the simple factors that may affect the time of data recovery;

  1. The Size of the Hard Drive
    Bigger hard drives will normally take longer to recover than smaller drives because bigger drives have more sectors to go through when recovering. However, it will also depend with the kind of damage. There are cases where a physical damage on a drive with bad sectors will take long regardless of the size.
  2. The Model or Series of Hard Drive
    Even though most/or all data recovery softwares are made to match industry standards, some hard drive models are faster to recover than others. It all depends with the manufacturer’s technology use.
  3. The Type and Size of Your Files.
    This goes without saying, when a hard drive has a lot of data, it will take longer than which has less. Also, large files such as videos etc may take longer to recover because of their size.
  4. The Environment You Operate Your Computers In.
    The conditions in which the device was being used on also affects the speed of recovery. This is because poor conditions lead to electronic and physical damage that make the recovery process longer.
  5. Data recovery equipment in use.
    Some data recovery equipments are better than others in that they are able to offer all necessary tools to repair and recover the data. Ie firmware for new hard drives etc.
  6. Donor Availability.
    Donor hard drives are normal hard drives that are identified since they match the faulty hard drive or are from the same family. Donors help in repair because their parts are used for repairing. In some cases, some donor hard drives are very rare to come by such as new ones. This may make the process take long.
    When your hard drive fails it’s better to first consult a data recovery engineer because any unprofessional attempt on it may lower the chances of success or even increase the recovery time which becomes more costly for you.

How to recover deleted files from nas drive?

NAS Data Recovery


NAS are reliable storage storages. However, they still can fail. If you cannot access your data from the NAS, you can try to recover the data using special NAS recovery softwares. Generally, NAS data recovery involves removing the disks from the NAS, numbering them, Imaging them, then connecting the images to a PC, and extracting files using data recovery software.


Some of the most common NAS device include;

  1. LaCie
  2. Western Digital
  3. QNAP
  4. Synology
  5. Buffalo LinkStation and TeraStation
  6. NETGEAR ReadyNAS
  7. Iomega Storcenter
  8. Seagate BlackArmor
  9. Thecus
  10. btrfs-based NAS servers
  11. ASUSTOR

NAS data recovery using Free or Paid NAS Data Recovery Softwares
Most of these NAS recovery software operate the same. But some may be better than others depending with the features.

Here are the steps;

  1. Get the disks out of the NAS and number them.
    After disconnecting the hard drives from the NAS, you should label them with numbers based on their order when setting up ie 0, 1, 2 etc
  2. Take images of the disks and connect them to a PC.
    This is a standard practice when it comes to raid configuration. It’s best to work with images incase anything happened, you always take another image from the original storages. Any mistake on the original hard drives could render your data unrecoverable.
  3. Download and install NAS Data Recovery software
    Since most NAS devices use md-raid or LVM drivers to handle an array, when choosing a NAS recovery software make such you chose one that supports that.
  4. Select the NAS volume you need to recover and click Start.
    Most software’s will be able to automatically populate a volume of the raid data. You should select it and data should start showing.
    If you can’t see the array in the NAS Data Recovery Software, then you need to recover RAID configuration first. This process is complex and requires special skills. Without the right configuration, one can’t reconfigure the raid. It’s best to consult a professional data recovery company.
    In some case, the Hard Drives could be physically damaged. These faulty disks should not be connected to the PC. However, they should be repaired and an image taken. Raid systems such as Raid 0, require all disk to be available for the process to be successful.

Causes of NAS Failure;
This may happen due to a number of things. Here are some of the most common causes.
• Power outrage:
Power surges may easily lead to NAS failure. Power loss or fluctuation may cause the disk not to integrating to RAID.
• Defective NAS controllers:
Corrupt firmware, operating systems errors, incomplete configuration etc. can also lead to NAS errors.
• Overheating:
Overheating can lead to NAS failure. It’s always advisable to regulate room temperatures.
• User error:
Common errors such as accidental deletion of files and folder can lead to NAS or RAID data loss.
• Manual faults:
When drivers fail, this sometimes causes NAS failure.
• Other natural catastrophes such as fire or water damage or any other natural calamity may lead to NAS failure.

How to get files off a raid hard drive | RAID Data Recovery

What does RAID Data Recovery mean?

RAID data recovery is the process of retrieving and restoring data from a RAID storage device such as NAS, Servers, SAN etc

Data recovery experts use a combination of automated and manual data recovery processes to extract and recover data from one or more RAID drives and storage components. RAID data recovery can be implemented on both hardware- and software-based RAID.

RAID data recovery is unique from the normal data recovery processes as the RAID storage architecture uses a unique and complex method of storing and extracting data. RAID data recovery can be for any of the RAID levels, some of the most common include RAID 0, Raid 1, Raid 5, Raid 6, Raid 10, Raid 50, Raid 60, Raid 5E, Raid 5EE. Raid Failure is usually caused by:

  1. Faulty hard disk
  2. Faulty controllers
  3. Data overwritten
  4. Application/software corruption
  5. Reformatting

RAID recovery generally requires reconstruction of all RAID storage arrays to original or last known good settings and configuration. The individual/software must know the RAID configuration at the hardware, software and firmware level to successfully retrieve data. Identifying the correct RAID array is an essential part of the RAID recovery process.

Since raid is very delicate, it’s not advisable to attempt to recover without the necessary skills, this is because any mistake or wrong rebuilding could render the data unrecoverable. Images of all the disk should be taken before attempting anything. For raid cases, it’s best to consult a data recovery expert.

What is data recovery techniques? Advanced data recovery techniques.

After you format a hard disk or delete your data, your data isn’t really lost. The file system just governs the data’s entry. For instance, when you delete some files in Windows and empty the recycle bin, the machine leaves the storage area of these files also just removes these files’ pointer be accessible. Data retrieval techniques can easily recover the deleted files, before documents overwrite the storage area of the files.

Data retrieval procedure is a procedure of recovering damaged, inaccessible, missing, corrupted, deleted or formatted data from PC disk drive, secondary storage, removable media, when the data stored in them cannot be accessed in a way that is standard. There are hundreds and hundreds of data recovery techniques from the web. Many businesses offer data recovery techniques which may recover lost data from hard drive, USB flash drive, raid, servers, memory card, digital camera, etc..

East Africa Recovery Experts provides advanced data recovery methods. The data retrieval methods from East Africa Recovery Experts can help users to recover deleted/formatted, damaged or inaccessible information from HDD/SSD, USB flash drive, memory card, SD card, digital camera, external hard drive, digital camera, voice recorder, etc..

Software Data Recovery

Main East Africa Recovery Experts data retrieval techniques:

  1. Deleted file recovery and recycle bin data recovery.
  2. Formatted file recovery; reformatted file recovery.
  3. Raw recovery.
  4. Hard drive partition recovery.
  5. Lost data recovery.

Most data recovery software’s work more or less the same. Whether it’s free or paid data recovery software’s. Here are techniques to use when using these softwares.

Step 1: Download and install Data Recovery Software.

Step 2: Choose hard drive where your data is lost.

Step 3: Scan the hard drive to find lost data.

Step 4: Preview and recover lost data.

Step 5: Save the data to a different storage.

Physical Data Recovery

These are issues caused by hard drive fell, power surge, Water or liquid entering the hard drive or Laptop etc. Some of these issues are identical in that the faulty device doesn’t detect in the computer. in most cases or you can’t copy or open the files.

Physical data recovery requires a professional data recovery company because it requires special skills and state of the art equipment’s for that purpose. Such as cleanroom etc. Before handling any physically damaged device it’s better to consult data recovery experts such as East Africa Recovery Experts for free consultancy.

What Is Data Recovery And How Does It Work?

We’ve all handled data loss, whether it was deleting a file or from the hard drive failure. You’ve probably wondered about data recovery does this function if you’ve ever experienced a loss of data? How effective will it be? How much does it cost? We attempted to seek out.


Data Loss and Data Recovery
Data loss can take many forms deletion, hard disk failure, software bugs, data corruption, hacking just a very simple power failure could cause you to lose data. And, obviously, there are more extreme instances, for example when there can be a drive retrieved out of a plane crash some data retrieval specialists can recover data from storage network that’s been almost completely destroyed.


If a little bit of data was in your own hard drive, solid state disk drive, USB stick, RAID, or additional storage media, you may have the ability to hire someone (or even buy some software) to perform data retrieval. Data retrieval is, simply, the repair and interrogate. Naturally, data recovery wont necessarily be potential a method can be damaged or corrupted to capture much of their data back.

But, data recovery technology has gotten acutely higher level; as an example, East Africa Recovery Experts, a Kenyan data recovery company, has been in a position to recover 99% of the information in a drive that had firmware encryption on it’s PCB.


How Does Data Recovery Work?
Below are some of the major types of data loss. The methods to be used to recover depend with the level of damage and how the data was lost.


Data Deletion
Interestingly, any document that is deleted actually stays on your own device before it is flashed beyond recovery. This means that if you act fast, you’ve got a pretty good likelihood of receiving the back file . In the case of file deletion, then you may use file retrieval softwares, that uses complex algorithms that look in pieces of info that is left on the hard drive in order to figure where the file was stored. You’re going to find the file back, if it guesses correctly again. Otherwise, you’re out of luck.


However, doing virtually anything in your desktop can lead to the file being uninstalled and probably lost forever. Even browsing the Internet may result in cache or cookies files being stored in that location, overwriting the info you are hoping to retrieve. And installing document retrieval applications can do the identical task. In case the file wasn’t overwritten, the chances of getting it back vary based upon the arrangement of your document system.


As an example, the Windows NTFS system retains record description information after the document has been deleted, which makes it relatively easy for file recovery applications to locate the file. Additional systems, however, like UTF and FAT, destroy extra information about the file if it is deleted, which makes it tougher to allow file-recovery calculations to guess that the place of the file on the disc drive.


File Corruption
When you’ve ever gotten you of those dreaded”corrupt drive” mistakes, then you know just how hard it might be. It’s still possible that data can be retrieved. If you join the drive into a different computer system, you may realize which the remainder of one’s data is fine, and that the system was corrupted. it’s only a question of copying everything to a different drive.


Another issue that could cause you to this stage is a corrupt partition, which may be possible to repair using the proper software. It should be easy to find every one of your files back if you can successfully fix the table again. If not, you still might be able to recover information from your table even though it depends greatly on the level of corruption to get your documents back.


Also if the files you are attempting to regain are corrupted, there is a possibility you’ll have the ability to receive usable parts of them back using recovery applications; provided that the computer program can get the document, it is going to attempt to regain it. There is always a possibility you’ll find a partition As you may be unable to utilize exactly what you get.


File System Format or Damage
Comparable to deleting a document, partitioning a file program destroys info in regards to the prior documents and arrangement of the disc, however, the number of information that is erased is dependent upon the system structure.


As an example, formatting using FAT results in the destruction of a lot of information and rewriting that part of this disk with zeroes, considerably reducing the probability that you’ll be able to recover your information. Some file systems, like NTFS, will have a higher likelihood of recovery if they’re uninstalled using the same file system, while some actually have a bigger opportunity if they are overwritten with the identical system — writing XFS over FAT makes it more probable for the FAT documents to be recovered.


In the example of file system damage, the amount of documents which may be recovered is dependent upon the area of the harm and what allocation data remains readily available to the retrieval program. If enough data is present for your retrieval applications to fix the file and correctly find preceding records, you ought to be able to recover a significant bit.


Physical Drive Damage
Recovering files which have been deleted or formatted is one thing — getting files off of a physically damaged hard drive is another. Coping with a damaged hard drive is better left to the professionals, even since it demands that the hard drive be taken apart.


Opening a hard drive is very difficult and best left for data recovery engineers who do it in a professional clean room. Cleanrooms are highly controlled environments that are free from contaminated air. Dust settling on a hard drive platter can cause the read/write head to crash and create scratches where data is stored. Static electricity can also damage the drive, so these rooms, this equipment used in them, and the clothing that technicians wear are anti-static.


If you take your drive to a data recovery expert, they will take a range of measures, from rebuilding sectors of the hard disk to making a disc image and performing their very best to fix the corrupt components utilizing complex software. The expense of the rebuilding, proprietary imaging technology, and upkeep of the clean rooms is that which may drive the price of professional data retrieval.


Solid State Drive Data Recovery
Solid state drives are getting increasingly more popular, particularly with the growth of ultrabooks. Evidently, as they haven’t been around so long, recovering data in the SSD is more challenging than it would be to recuperate from a classic hard disk. A range of the techniques may be utilized to recover.


However, recovering data from a physically damaged solid state drive is extremely expensive, as the technology is still new.


Data retrieval software and data recovery experts can do a wonderful job of getting your data back, but it’s time-consuming, and expensive. The ideal measure you can take to stop long-term data loss is by making plenty of copies! Utilize a cloud backup supplier, keep a backup drive and be sure you don’t get caught out with a power spike or an accidental formatting. And take action to prevent file corruption.

Why Choose East Africa Recovery Experts Data Recovery Service?

From the start, East Africa Recovery Experts’s data retrieval lab has always been about putting data recovery for all of us, not just huge corporations. East Africa Recovery Experts pioneered free shipping, free evaluations, and financially secure for its clients, by corporate IT departments to a mom and daddy who’ve only lost years’ worth of photos of their kids. While these offerings have been embraced by other labs, East Africa Recovery Experts’s services remain the option, frequently 40 to 50 % of labs’ costs, and without sacrificing quality.

East Africa Recovery Experts’s data recovery services are affordably priced, technologically innovative and completely secure. By carefully controlling our overhead costs, East Africa Recovery Experts does more to walk the balancing act between being affordable and offering quality services than any other data recovery lab. With our data recovery engineers in your corner, you don’t have to sacrifice quality and efficiency.

Have you made up your mind? Contact us Today.

Scroll to top