- Lost volume
- Broken arrays
or Logically Damaged Drives within the Array
- Missing Volume
- Lost container
- Volume Corruption
- Server Configuration
- Missing Container
- Virus Attack
- Missing Partitions
- Lost Key
- OS and File
- Failed Drive(s)
- Parity Errors
Common RAID Configurations:
This technique offers striping but no redundancy of data. It offers
the best performance but no fault-tolerance and if a drive fails in
RAID 0 only repair and reassembly of the volume will result in a recovery.
This type is also known as disk mirroring and consists of at least
two drives that duplicate the storage of data. This may become a problem
should you experience a corruption of data. You will then have 2 copies
of bad data. This is recoverable
This type uses striping across disks with some disks storing error
checking and correcting (ECC) information.
This type uses striping and dedicates one drive to storing parity
information. Should 2 drives in the system fail at once, only hard
drive repair and volume restoration will result in a RAID recovery.
This type uses large stripes, which means you can read records from
any single drive.
(Most common) This type includes a rotating parity array. This type
requires at least three and usually five disks for the array but can
hold more. Should 2 drives in the system fail at once only hard drive
repair or volume restoration will result in a recovery