RAID Data Recovery: RAID 4 Hard Drive ArraysRAID Level 4 requires a minimum of 3 drives to implement. Each entire block is written onto a data disk. Parity for same rank blocks is generated on writes, recorded on the parity disk and checked on reads. In certain instances a RAID 4 array can recover from multiple and simultaneous hard drive failure. It has the worst write rate of RAID designs, and has a very complex controller setup, however it reads rapidly and is highly efficient.
Recovering data from RAID 4 Hard Drive Arrays
Because data on a RAID array or volume is typically critical to business continuity, when it becomes inaccessible due to one or more hard drives failing, a bad RAID controller, failed upgrade or damaged striping, it is imperative that you shut the server down and get expert help! Permanent loss of data often occurs when hard drives are swapped, moved from one position to another or placed in other machines in an attempt to rebuild or repair the array. Formatting a boot drive or partition can also damage or remove striping reducing recoverability of data and causing permanent loss.
The RAID 4 data recovery technicians at ADR Data Recovery can rebuild failed hard drives, repair damaged RAID volumes and recover data your company needs if you call before the damage is too severe. Once platters are damaged, striping overwritten or changed completely, the chances of getting your data back are slim.
Common RAID 4 Failures And Data Loss Issues
- Raid controller failure or configuration changed
- Two or more hard drives fail or go offline
- Server crashes and won't remount the array or volume(s)
- Configuration becomes corrupt or damaged
- Adding incompatible drives
- Hardware conflicts
- Software corruption
- Virus infection, software and operating system upgrades