Hard Drive Recovery Group | RAID 5, 0, 1 and 10 Data Recovery

RAID 5 Data Recovery

Hard Drive Recovery Group specializes in corporate level server and RAID data recovery services and can restore and recover data from your RAID 5, SAN, NAS, Snap Server, MSExchange and other professional level servers. Our RAID recovery labs feature terabyte capable servers to ensure that each data restoration is handled quickly, and with complete safety.

Trust Experience First
With over 15 years of experience recovering RAID 0, 1, 5, and 10 servers, Hard Drive Recovery Group offers professional RAID recovery with a difference. With the data recovery industry adding new inexperienced shops each year, we provide the kind of guaranteed, customer-centric service that is necessary when mission critical servers go down.

Many shops, as an example, will recommend remote recovery options. What many non-industry people do not understand, however, is that these utility or software based solutions can literally be the kiss of death for their data. Remember that when you have a RAID data emergency, there is no time for mistakes. Results are all that matter.

Hard Drive Recovery Group can offer you immediate work references so you can check on our results. We encourage all RAID recovery clients to check up on their data recovery provider. Beware of lofty claims – ask for references BEFORE you do anything..

Click here to get a RAID recovery quote.

RAID Configuration Data Recovery Descriptions
RAID 1 - Mirrored RAID Configuration

With the low cost of hard drives, the RAID 1 configuration is a very popular choice for smaller businesses. Data is redundantly stored, and performance remains very similar to that of a single drive non-RAID solution. Typically, if one of the drives in a RAID 1 setup fails, the other will take its place, with the user being warned by the server software. Often, Utility programs are recommended to remedy the situation.

Where Utilities can fail include:

Corrupt Mirrors - If bad data is on the weak drive, it may be transferred to the strong drive through mirroring. This can cause havoc with the system.

Broken Mirrors - If your RAID configuration mirror breaks, your system may try to boot, but will often fail. This is the result of the mirror meta data already put in place.

Incorrect Mirroring - Some utilities will by default rebuild incorrectly, and point to the wrong drives.

RAID 0 – Striped RAID Configuration

RAID 0 is an optimized hard drive performance configuration, creating disk space and disk input/output efficiencies, but without the redundancy safety provided by other RAID configurations.

The RAID 0 system works by writing data on alternate blocks on alternate drives, each using a defined stripe size. The advantages of this configuration include not only high speed data access, but full disk space use on both drives.

Recovering the RAID 0 system is frequently not for the non-professional. All drives in a RAID 0 system must be accessible for a recovery to occur, and Hard Drive Recovery Group has the equipment available for this job.

RAID 5 – A Professional, Alternating Parity Solution
As far as enterprise level storage solutions go, RAID 5 is one of the most popular, mainly due to its combination of true data redundancy and drive space optimization. Data access and throughput are typically quite high, as multiple disks are used, all managed together using what is called a parity block.

RAID 5 combines the advantages of RAID 0 and 1 by using striping, but breaking these strips into blocks. Each stripe in a RAID 5 array is not a data block per say, as it is a parity block. Typically, these systems can survive the loss of one drive. But two drives lost in a RAID 5 system typically kill the array.

Recovering a RAID 5 System has a number of potential pitfalls:

Incorrect Drive Marking – During drive failures, RAID cards can typically mismark a drive, which can mean failed drives can be forced “online”, thus further damaging the array.

Second Drive Failures – Sometimes, first drive failures can go unnoticed, and the system can continue to function without much loss in performance. But when a second hard drive in a RAID 5 configuration fails, losses can be severe. Additionally, when two drives are down, it can be quite difficult to determine (without professional help, that is) which drive contains the freshest data.

Automatic Rebuild Errors – Sometimes a RAID utility can simply choose the wrong drive to rebuild from, and can as a result corrupt the entire array!

Drive Disorder – Sometimes, through human error, drives can be placed in an enclosure out of order. This can cause havoc with the system, as previous access points and parity blocks come into question if not outright fail.

Professional Help Is Here
These are the main causes of RAID 5 failure that require data recovery. But there are others. Remember that at Hard Drive Recovery Group, a consultation is always free. Don’t take chances when it comes to your mission critical RAID-stored data. Call us first.

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Click here to request a free RAID data recovery quote.



	RAID 5 Data Recovery Hard Drive Recovery Group specializes in corporate level server and RAID data recovery services and can restore and recover data from your RAID 5, SAN, NAS, Snap Server, MSExchange and other professional level servers. Our RAID recovery labs feature terabyte capable servers to ensure that each data restoration is handled quickly, and with complete safety. Trust Experience First With over 15 years of experience recovering RAID 0, 1, 5, and 10 servers, Hard Drive Recovery Group offers professional RAID recovery with a difference. With the data recovery industry adding new inexperienced shops each year, we provide the kind of guaranteed, customer-centric service that is necessary when mission critical servers go down. Many shops, as an example, will recommend remote recovery options. What many non-industry people do not understand, however, is that these utility or software based solutions can literally be the kiss of death for their data. Remember that when you have a RAID data emergency, there is no time for mistakes. Results are all that matter. Hard Drive Recovery Group can offer you immediate work references so you can check on our results. We encourage all RAID recovery clients to check up on their data recovery provider. Beware of lofty claims – ask for references BEFORE you do anything.. Click here to get a RAID recovery quote. RAID Configuration Data Recovery Descriptions RAID 1 - Mirrored RAID Configuration With the low cost of hard drives, the RAID 1 configuration is a very popular choice for smaller businesses. Data is redundantly stored, and performance remains very similar to that of a single drive non-RAID solution. Typically, if one of the drives in a RAID 1 setup fails, the other will take its place, with the user being warned by the server software. Often, Utility programs are recommended to remedy the situation. Where Utilities can fail include: Corrupt Mirrors - If bad data is on the weak drive, it may be transferred to the strong drive through mirroring. This can cause havoc with the system. Broken Mirrors - If your RAID configuration mirror breaks, your system may try to boot, but will often fail. This is the result of the mirror meta data already put in place. Incorrect Mirroring - Some utilities will by default rebuild incorrectly, and point to the wrong drives. RAID 0 – Striped RAID Configuration RAID 0 is an optimized hard drive performance configuration, creating disk space and disk input/output efficiencies, but without the redundancy safety provided by other RAID configurations. The RAID 0 system works by writing data on alternate blocks on alternate drives, each using a defined stripe size. The advantages of this configuration include not only high speed data access, but full disk space use on both drives. Recovering the RAID 0 system is frequently not for the non-professional. All drives in a RAID 0 system must be accessible for a recovery to occur, and Hard Drive Recovery Group has the equipment available for this job. RAID 5 – A Professional, Alternating Parity Solution As far as enterprise level storage solutions go, RAID 5 is one of the most popular, mainly due to its combination of true data redundancy and drive space optimization. Data access and throughput are typically quite high, as multiple disks are used, all managed together using what is called a parity block. RAID 5 combines the advantages of RAID 0 and 1 by using striping, but breaking these strips into blocks. Each stripe in a RAID 5 array is not a data block per say, as it is a parity block. Typically, these systems can survive the loss of one drive. But two drives lost in a RAID 5 system typically kill the array. Recovering a RAID 5 System has a number of potential pitfalls: Incorrect Drive Marking – During drive failures, RAID cards can typically mismark a drive, which can mean failed drives can be forced “online”, thus further damaging the array. Second Drive Failures – Sometimes, first drive failures can go unnoticed, and the system can continue to function without much loss in performance. But when a second hard drive in a RAID 5 configuration fails, losses can be severe. Additionally, when two drives are down, it can be quite difficult to determine (without professional help, that is) which drive contains the freshest data. Automatic Rebuild Errors – Sometimes a RAID utility can simply choose the wrong drive to rebuild from, and can as a result corrupt the entire array! Drive Disorder – Sometimes, through human error, drives can be placed in an enclosure out of order. This can cause havoc with the system, as previous access points and parity blocks come into question if not outright fail. Professional Help Is Here These are the main causes of RAID 5 failure that require data recovery. But there are others. Remember that at Hard Drive Recovery Group, a consultation is always free. Don’t take chances when it comes to your mission critical RAID-stored data. Call us first. Did this article help? Submit it to: del.icio.us \| Digg it \| Simpy \| Yahoo MyWeb Click here to request a free RAID data recovery quote. All material on this website is copyright 1996-2010 Hard Drive Recovery Group. All Rights Reserved.	24 Hour RAID Repair RAID 5 Data Recovery RAID 10 Data Recovery SAN Tape Recovery RAID System Repair SNAP Server Data Recovery RAID Failure Recovery SAN Data Recovery RAID Configurations Defined RAID Drive Recovery SCSI Data Recovery RAID Tape Recovery LTO Recovery RAID 5: Doomed? 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