Posts Tagged ‘raid servers’
April 2nd, 2009 | 
Author: Why RAID data recovery?
As we know, RAID recovery is one of the most complicated and challenging recovery procedures, and therefore, the cost is always very expensive. RAID systems are susceptible to the same ailments that plague single hard drive like logical problems, human error, viruses and physical damage. Otherwise, they may suffer from RAID array failure, controller failure, server registry configurations lost, accidental reconfigurations of RAID drives, multiple drive failure, and so on.
Well, any RAID system may be fault-tolerant, but they are not fault proof. More often than not, most commercial RAID implementations can tolerate the loss of a single hard drive by providing increased data security. In case bad things happen to the RAID controller or configuration (lost, damaged and rebuild by mistake…), your data may be compromised, thus data recovery is necessary.
How RAID data recovery works?
The utility will extract the data from multiple HD in a RAID system, and work to rebuild the correct data according to a variety of RAID data array, independent from hardware array card or server system. The essence of the RAID recovery procedures is to crack the algorithm of a variety of RAID cards, or simulate the RAID card to read data scattering among multiple segment hard drives and recompose it in a correct form to a new storage medium by analyzing the data structures of the multiple segment hard drives in the RAID system directly.
Many RAID recovery companies out there claims to recover lost or deleted data when RAID servers are down using their tools. Several excellent RAID recovery software utilities currently available in the market like WINHEX, Run Time, and R-Studio for example, are prominent at some points.
The merits of these software utilities are well talked most of the time amongst professionals and common users worldwide. Here the list of reviews collected based on in-depth analysis.
WINHEX
With manual analysis available only; complicated operations are always in need of experience and expertise.
Run Time
With automatic analysis available only; users can not have DirectView of the rebuilt data; inconvenient operation.
R-Studio
With manual analysis available only; complicated operations are always in need of experience and expertise.
It is worth mentioning that above software utilities do not support RAID 5E and RAID 5EE.
It is currently discovered by data recovery practitioners and professionals worldwide that the new version of Data Compass with RAID recovery add-on will soon be released in early April. The vendor engineered the cutting edge RAID recovery technology as a built-in utility in Data Compass for the purpose of RAID system diagnosis and recovery, despite the capability in handling physical and logical defective hard drives. It is also said that this utility is designed for automatic analysis and reconstruction of RAID disk array, starting position of the data and stripe size and stripe order. Fully support RAID 0/5/5E/5EE.
What’s more, according to the vendor, their previous users will be able to upgrade from them free of charge. As you may probably know, upgrade version is more likely than not charged by every single vendor, as always, so we will see how it grows; otherwise, make sure you have done your homework with a list of solutions you may interested in before you get some action.
SalvationDATA develop and manufacture specialized Data Recovery Equipment and HDD Repair Tools!
Article Source: List of RAID Data Recovery Solutions
RAID servers are considered as the most trusted and reliable storage medium. But sometimes, they may also lose all the hard drives, which include your important data, backups and other information.
Most of the organizations use RAID for storing their important SQL Server databases. When they fail, generally you may lose all of your data, but sometimes you may get some traces of data and can recreate the database.
In such situations, you can save your database by restoring the database from your backup. But unfortunately, when you try to restore backups, which were made through MS SQL Server for a database, which is running on DTP SmartRAID V controllers, you may receive the following error message:
“Msg 3270, Level 0, Sev 16.
An internal consistency error occurred. Contact Technical Support for assistance.”
In this case, when you attempt to detach the database using sp_detach_db stored procedure and then attempt to attach the database again with the help of sp_attach_db stored procedure, you may get the flowing error message:
“Server: Msg 5172, Level 16, State 15, Line 1.
The header for file ‘d:\pubs.mdf’ is not a valid database file header. The PageAudit property is incorrect.”
After this error message, the restoration process gets halted and you can not access anything from your SQL Server database.
Grounds of the trouble
As stated in the above error messages, this problem is either due to inconsistent state of the database or due to invalid header entry for the database. In both of these cases, the database may get damaged and thus even a single bit of data can not be retrieved from it.
In such disastrous situations, you need to perform SQL recovery to repair the damaged database and retrieve all of your data from it. SQL recovery can be carried out using the MDF recovery software.
MDF recovery software are easy to use tools, which allow you to have quick and trouble-free MDF repair in each and every case of MDF corruption. To ensure complete and successful SQL repair, always use effective SQL recovery software like Stellar Phoenix SQL Database Recovery software.
Phoenix MDF recovery software works well in all MDF corruption posers. This MDF repair software can effectively repair and restore all of the SQL Server database objects including tables, reports, forms, triggers, stored procedures, defaults, user defined data types and likewise.
With read only and non destructive conduct, this SQL repair software is safe to use. Phoenix SQL recovery applies on MS SQL Server 2000 and 2005. To get in-depth knowledge about the workings, user interface, and powerfulness of this robust MDF recovery software, download and use free demo version. Demo version is available on Stellar’s website.
Simpson is a freelancer for Stellar which offers data recovery software and file recovery programs for different OS and file system including data recovery mac, data recovery linux, SQL recovery , pst recovery and many other programs.
Article Source: Database Inconsistency and Invalid File Header Problems in MDF