Hard Disk Failure and Recovery on Exchange Server

A computer system can detect and communicate hardware devices because of corresponding device driver programs. However, if these programs find hardware in unexpected state, an error message or system´s unusual behavior results. In interest of hard disk, its physical failure is the most likely reason for such issues. Hard disk failure can occur due to electronic or mechanical reasons. When factors like high intensity shocks, prolong use, heat, water and torn out internals affect hard disk, it gets highly prone to physical damages. That´s the reason why  hard drive recovery software experts suggest users to always backup data so as to restore it if ultimately hard drive fails.

BIOS can not recognize a physically failed hard drive. As a practical scenario of Exchange Server, when user attempts to mount the databases in the storage group (databases are more than one in number), it fails. Also if a hard disk fails while all storage group daabases are mounted, they automatically get dismounted.

Cause

Exchange Server follows ACID (Atomic Consistent Isolated Durable) transaction model for storing data in its databases. ESE (Extensible Storage Engine) keeps record of all transactions in log files to be performed. This is to ensure that all databases must reach a consistent state. But if a hard disk fails, ESE comes to a state when rollback can´t be performed and so it dismounts all the databases.

Solution

In order to solve the issue, user can replace the failed hard disk and restore the affected database from backup. If data backup is unavailable or corrupt (due to media defects or improper backup process), Hard Disk Recovery service can help. It is a highly technical, yet safe, approach to recover data from physically failed hard disks.

Hard drive recovery service is provided using advanced tools. A physically failed hard drive is first dissected in serile surroundings of Clean Rooms. Experts take care of data integrity and so follow up safe procedures. After determining the cause, according procedure is applied. For example, if a read/write head is crashed, Hard Disk Recovery experts either attempt to repair it or replace it with new one. These procedures also include disk imaging and platters moving like complicated processes.

Stellar Information Systems Limited offers safe and confidential Hard Disk Recovery service. Stellar facilitates Class 100 Clean Rooms for safe recovery. It has a rich experience of more than 16 years in the field. It has a range of highly technical tools and techniques to efficiently recover data. The company provides services for SCSI, SATA and IDE hard disk interfaces.