RAID Data Recovery Service
CBL Data Recovery has been dealing in RAID data recovery services for years. From the best data recovery labs to industry expert recovery specialists, we got everything to retrieve your critical data fast and securely. Moreover, our skilled engineers have the knowledge and expertise to recover data from faulty RAIDs and Servers.
RAID Data Recovery by CBL
RAID Data Recovery also often refers to RAID Arrays Recovery. When we need to recover our data from RAID arrays. We use RAID for fault tolerance, which means that if one drive fails, the system still works fine. The problem comes when we lose all of our data, and then we need to restore it. This process is called RAID Data Recovery.
RAID Data Recovery Process
The RAID array recovery process is a complex one. It involves the following:
- Recovering data from failed disks in the array
- Rebuilding the array (if possible)
- Restoring data to the new array
If you are experiencing problems with your RAID array, it’s important that you contact us as soon as possible so we can help you get back.
What are the types of RAID Data Recovery?
There are two types of RAID array recovery:
Type 1: Recovery from a Single Drive Failure
This is the most common type of RAID recovery and can be performed by any computer user with basic knowledge of computers, operating systems, and software.
Type 2: Recovery from Multiple Drive Failures
This involves recovering data from all drives in an array, which may require more advanced skills than those needed for a simple RAID recovery.
What is RAID?
RAID also stands for Redundant Array of Independent Disks
RAID arrays are designed to protect data from being lost if any single drive fails. They are linked together and placed inside a metal enclosure in order to prevent the loss of data and/or to boost overall performance.
It involves the usage of multiple hard drives to increase the storage capacity and safeguard the data. If one of the drives fails or crashes, the systems still keep functioning normally. However, RAID arrays are still prone to data loss. A lot of times, multiple hard drives crash one after another, leaving the system unusable and leading to data loss.
How does RAID actually works?
RAID works by combining multiple hard drives together to create a single large storage space. When you put your data onto a RAID array, the data is divided up among the various drives so that it can be accessed quickly.
For example, if you have a 4-drive RAID array, you would divide your data into four equal parts. Then, you would place those four pieces of data on the four drives. In order to access the data, you would go to the first drive and read the first part of the data. You would then move to the second drive and read the next part of the data. This continues until you reach the fourth drive where you would read the final part of the data.
The availability of several disks makes it possible to use a variety of data storage strategies, such as disk mirroring, disk striping, and parity.
3 Common Data Storage Methods of RAID Arrays
The availability of several disks makes it possible to use a variety of data storage strategies, such as disk mirroring, disk striping, and parity.
Method 1: Mirror disks
are used to increase performance by allowing multiple drives to be accessed at once. However, they can decrease performance when writing to the mirrored drive because the computer has to verify that the write was successful before moving on to the next disk.
Method 2: Stripe
writes data across multiple disks at once, which increases speed.
Method 3: Parity
A parity error check is where redundancy information is computed for each chunk of stored information. If a hard disk fails, the missing information can be recovered from the remaining information and the parity bits. Error correction tends to take longer than just reading the original file, but it does ensure that your files are not corrupted.
*RAID arrays are not only used in data centers but they are also used in home computers, laptops, smartphones, tablets, etc.
The Different Levels of RAID
RAID levels refer to how many hard drives are combined together to create a RAID array. There are five different types of RAID levels. Each level provides greater protection than the previous level.
RAID 0 (Striping)
RAID 0 is the lowest level of RAID array. In RAID 0, two or more hard drives are combined together and treated as one larger hard drive. RAID 0 offers no redundancy at all.
RAID 1 (Mirroring)
In RAID 1, one hard drive is mirrored onto another hard drive. When a hard drive fails, the mirror image of the failed hard drive is automatically copied over to the remaining working hard drive. RAID 1 offers some redundancy but not much.
RAID 5 and 6 (Striping + Distributed Parity)
RAID 5 is the highest level of RAID array. RAID 5 combines three or more hard drives together. RAID 5 uses parity to provide additional protection. Parity means that extra bits of information are added to the data stored on the hard drives. If one of the hard drives fails, the data can still be recovered using the other hard drives.
*RAID 6 is similar to RAID 5 except that RAID 6 adds error correction codes (ECC) to the system. ECC helps detect errors before they occur. RAID 6 is considered the best type of RAID array.
RAID 10 (Mirroring + Striping)
RAID 10 combines four or more disks together to create a single logical unit. It has the same features as RAID 5 except that it adds an extra disk to increase performance.
What are the Different Types of RAID?
RAID can be deployed as hardware (controller card or chip) or software by storage administrators (software-only or hybrid).
Software RAID is classified into two types:
Pure Software – specified by the operating system and;
Software RAID is the least expensive RAID kind and is frequently provided as a native feature on the operating system. It is a software application that runs on the host and manages RAID calculations for associated hard disk drives. It is connected via an HBA or native I/O interface and activated when the RAID driver is loaded by the operating system.
Hybrid Software – that includes a hardware component to reduce CPU burden.
This software-based RAID makes use of a hardware component to provide RAID BIOS functionality from RAID BIOs on the motherboard or an HBA. This technology provides an extra degree of safety against a defective boot process. The operating system boots software-only RAID, therefore boot mistakes can impact the entire RAID subsystem. The installation of a RAID BIOS hardware component safeguards the subsystem against operating system boot problems.
RAID services are provided by a specific hardware controller. IT can use either an external RAID Controller Card or an inside RAID-on-Chip to deploy hardware RAID.
RAID Controller Card: A PCIe or PCI-X motherboard slot accepts this plug-in expansion card. A RAID processor and I/O processors with drive ports are included in the card. Because the cards are independent of the host, all RAID operations are offloaded from the CPU to the specialized card.
RAID-on-Chip: On the motherboard, a single chip incorporates the host interface, HDD I/O interfaces, the RAID processor, and a memory controller.
When should you use RAID
The only time I would consider using RAID is if the server has a single drive failure. If it’s an SSD, then that could be catastrophic to your data. In this case, RAID-1 or RAID-5 are good options. You can also do RAID-10 with two drives, but that will give you less space than RAID-0 (striping).
If you’re looking for performance, then RAID-6 is probably the best option. However, it’s much harder to implement.
When should you NOT use RAID?
The main reason why people don’t use RAID is because they think it’s too complicated. That’s true, but it’s really not that hard. There are plenty of tutorials out there that show how to setup RAID.
Another reason is that people think RAID is expensive. Again, that’s true, but it depends on what kind of RAID you need. A cheap RAID card won’t cost as much as a new hard drive.
Finally, some people just don’t like the idea of losing their data. While RAID does protect you from disk failures, it doesn’t guarantee 100% protection. So, if you have a RAID-1 setup, and one of the disks fails, you’ll lose half of your data.
21 Most Common RAID Data Recovery Issues
The following is a list of the most common RAID data recovery issues. If you are experiencing any of these problems, please contact us for assistance.
- RAID Failure: The array has failed. This can be caused by many things including hardware failure or software corruption. In either case, it will not boot. You may need to replace the drive in order to recover data.
- RAID Recovery: The array was previously working fine but now fails to mount. This could mean that there is an issue with the disk itself (bad sectors), or it could be due to a corrupt file system on one of the disks. Either way, we recommend replacing the disk(s) in question.
- RAID Repair: The array was previously functioning properly but now shows errors when attempting to read data from it. This could indicate a problem with the disk itself (a bad sector) or it could be due a corrupted file system. We recommend replacing the disk(s).
- RAID Configuration Error: There was an error during configuration of the array. This means that the array cannot be mounted at this time. Please contact our support team if you would like further information.
- RAID Disk Failure: One or more of your drives have failed. It is recommended that you replace them immediately.
- RAID Drive Failure: A disk has failed. This could be due to physical damage or a faulty controller. It is recommended that the disk be replaced as soon as possible.
- RAID Controller Failure: The RAID controller has failed. This could happen because of a power outage, motherboard malfunction, or other hardware related issue. It is recommended that a new controller be installed.
- RAID Software Corruption: The RAID software has become corrupted. This could occur because of a virus, improper installation, or other software related issue. It is highly recommended that you reinstall the software.
- RAID Hardware Failure: The RAID controller board has failed. This could occur because the motherboard has died, or because of a bad cable connection. It is recommended that an entirely different motherboard be used.
- RAID File System Corruption: The RAID file system has become corrupted. This usually occurs because of a virus, improperly configured RAID settings, or improper installation. It is recommended that your RAID file system be restored using a backup copy.
- RAID Volume Size Issue: Your volume size is incorrect. This could be because of a bad partition table, or because of a damaged hard drive. It is recommended that either the partition table be repaired, or the drive be replaced.
- RAID Partition Table Corrupted: The partition table has been corrupted. This could occur if someone else formatted the drive, or if the drive was accidentally reformatted. It is recommended that it be repaired.
- RAID Hard Drive Failure: The hard drive has failed. This could also be caused by a bad sector, which is why it is important to back up all data before performing a replacement.
- RAID Boot Failure: The RAID boot device has failed. This could cause the computer to fail to start. It is recommended that another bootable device be used instead.
- RAID Device Not Found: The RAID device does not exist. This could be because the RAID card was removed or the motherboard was changed. It is recommended that this device be added again.
- RAID Driver Missing: The RAID driver is missing. This could be because you are running Windows XP and do not have the drivers for the RAID card installed. It is recommended that they be installed.
- Raid Array Not Mounted: The RAID array is currently unmounted. This could be because it is being used, or because it was never mounted. It is recommended that mounting be performed.
- RAID Failed To Mount: The RAID array did not mount correctly. This could be because a drive was removed while the array was active. It is recommended that remounting be performed.
- RAID Volume Is Full: The RAID volume is full. This could be because someone else has tried to use the same volume, or because of a badly written script. It is recommended that space be freed up.
- RAID Not Working: The RAID array is not working. This could be because there is no RAID card installed, or because the RAID card is dead. It is recommended that one be installed or tested.
- RAID Status Unknown: The RAID status is unknown. This could be because no RAID cards were detected, or because the RAID status is set to “Unknown”. It is recommended that a RAID card be installed.
In conclusion, if you are having trouble accessing your files, then you should consider backing them up. Backups are essential for protecting yourself against loss of data. They are also useful for restoring lost data, recovering deleted files, and making sure that you don’t lose anything else.
There are several ways to create backups, depending on your needs. For example, you might want to make regular backups, or only backup certain types of files. You may even want to store multiple copies of your data in different locations.
Do’s & Don’ts in Case of A RAID Array Failure
Shut down the server or RAID storage system as soon as you notice it has crashed or become corrupted. In most cases, users attempt to solve the issue on their own, which further harms the file system. Here are some typical errors you should avoid:
- Executing file system repair operations such as check disk.
- Installing software for data recovery.
- Read the drive’s damaged sectors for data.
- The RAID must be reset.
How To Recover Lost Files From RAID Arrays?
Diagnosing RAID Array
RAID Data Recovery Part 1: First, you will need to determine whether or not the RAID array has been damaged. You can do this by using the built-in diagnostic tool provided by the manufacturer of the RAID array.
RAID Data Recovery – Identifying Specific Failed Disks
RAID Data Recovery Part 1: Next, you will need to identify the specific disk(s) that have failed. You can do this either manually or automatically. Manual identification requires you to physically remove each disk from the RAID array and check its serial number. Automatic identification uses special tools available online.
RAID Data Recovery Part 2: Once you know what disk(s) have failed, you will need to decide how much data needs to be recovered. There are three options for recovering data from a failed disk:
Option 1 – Restore the Entire Volume
Option 2 – Restore Individual Files
Option 3 – Restore Individual Folders
We recommend restoring the entire volume because it gives you the best chance at getting everything back. However, if you choose to restore individual files or folders, you will need to make sure that you have enough space on your external storage device to hold them.
RAID Data Recovery Part 3: After determining how much data needs to restored, you will need to create a backup copy of the data before beginning the restoration process.
RAID Data Recovery Part 4: Finally, you will need to perform the actual recovery process. If you chose option 1, you will simply replace the failed disk with another working disk. Option 2 allows you to recover individual files or folders. Option 3 lets you restore individual folders.
RAID Data Recovery Part 5: Once the recovery process is complete, you will need to test the newly restored RAID array to ensure that it works properly.
RAID Data Recovery Part 6: If the RAID array does work correctly, you can then proceed to format the disk(s) that were previously removed from the RAID array.
RAID Data Recovery Part 7: Finally, you will want to move the data from the now formatted disk(s) into the RAID array.
RAID Data Recovery Part 8: The above steps should allow you to successfully recover lost data from a RAID array.
Exclusive Rapid RAID Data Recovery Service
We provide emergency data recovery services to ensure your business downtime is as low as possible. With our one-of-a-kind “Rapid RAID Data Recovery Service” your business can get back on track quickly. Data Recovery CBL delivers quality data recovery services wherever and whenever you want.
We are an expert in:
- SAN Data Recovery
- NAS Data Recovery
- Server & RAID Data Recovery
- Backup Tape Set Recovery
Email Archives, Databases, and Additional Resources
To properly integrate recovered data, many of our clients require the restoration of RAID arrays, NAS devices, and other complex systems. Our engineers can simultaneously do data recovery and media repair to get you back online as quickly as possible.
Our engineers have competence with all operating systems, file systems, and hardware architectures, and we provide remote data recovery services for certain devices. Our engineers have knowledge with all operating systems, file systems, and hardware architectures, as well as RAID data recovery and hard drive repair.
All you need to do is submit a request on our website or call us, and we will pick up the faulty hard drive from your location as soon as possible.
So, you don’t have to ship the complete RAID array or server to our facility. Our engineers will fix the problem swiftly, and ship the hard drive back to you in no time.
We also offer on-site data recovery services. Our skilled RAID data recovery technicians are ready for deployment across the United States. CBL Data Recovery is committed to solving your data loss problems as we have our recovery teams on stand-by 24/7 throughout the year.
To get in touch with one of our customer representatives for any kind of data loss problem, give us a call.