What is basic disk?
A physical disk that contains primary partitions, extended partitions, or logical drives. Basic disks can be accessed by all versions of Windows, MS-DOS, and Windows NT. Basic disks can contain up to four primary partitions, or three primary partitions and an extended partition with multiple logical drives. Upgrading a basic disk to dynamic disk will render the entire disk unreadable to operating systems other than Windows 2000.
What is dynamic disk?
Supported by Windows 2000, dynamic disk is a physical disk initialized for dynamic storage. It holds simple volumes, spanned volumes, mirrored volumes, striped volumes, and RAID-5 volumes. With a dynamic disk you can perform disk and volume management without having to restart the operating system. Upgrading a basic disk to dynamic storage will render the entire disk unreadable to operating systems other than Windows 2000.
What is Fault Tolerance?
The ability of a system to respond gracefully to an unexpected hardware or software failure. There are many levels of fault tolerance, the lowest being the ability to continue operation in the event of a power failure. Many fault-tolerant computer systems mirror all operations -- that is, every operation is performed on two or more duplicate systems, so if one fails the other can take over.
What is RAID?
RAID stands for Redundant Array of Independent
Disks and is a technology that basically
involves combining two or more drives together to improve the performance and
the fault tolerance. Combining two or more drives together also offers improved
reliability and larger data volume sizes. A RAID distributes the data across
several disks and the operating system considers this array as a single disk.
What is “parity”?
Simply put, parity refers to a technique of checking whether data has been lost or written over when it's moved from one place in storage to another or when transmitted between computers.
Simply put, parity refers to a technique of checking whether data has been lost or written over when it's moved from one place in storage to another or when transmitted between computers.
What is “disk striping”? (RAID
0)
Disk striping is the process of dividing a body of data into blocks and spreading the data blocks across several partitions on several hard drives. Each stripe is the size of the smallest partition.
Disk striping is the process of dividing a body of data into blocks and spreading the data blocks across several partitions on several hard drives. Each stripe is the size of the smallest partition.
What is mirroring? (RAID1)
A technique in which data is written to two duplicate disks simultaneously. This way if one of the disk drives fails, the system can instantly switch to the other disk without any loss of data or service. Disk mirroring is used commonly in on-line database systems where it's critical that the data be accessible at all times.
What is RAID 5?
RAID 5 (striped disks with parity) combines three or more disks in a way that protects data against loss of any one disk; the storage capacity of the array is reduced by one disk.
What is
RAID?
RAID, or Redundant Array of
Inexpensive Disks, is a method of combining multiple hard drives for data
redundancy in case of a hard drive failure. This section describes each of the
different types of RAID supported by your Iomega Store Center Pro.
CAUTION!
Some RAID configurations add a level of redundancy for your data; however, RAID
should not be your only means of backup
What is
a Non-RAID configuration?
You can configure your Iomega Store
Center Pro without using a RAID. A non-RAID configuration does not allow any
data redundancy and is slower than some RAID configurations. Since there is no
data redundancy, you can use the entire physical capacity of your Iomega Store
Center Pro. Each drive will appear as a separate volume.
What is RAID 0?
RAID 0 uses a technique called data
striping. Multiple hard drives are combined to make one large volume. RAID 0
can read and write faster than a non-RAID configuration, since it splits the
data and accesses all disks in parallel. RAID 0 does not provide any data
redundancy. RAID requires two or more hard drives 0.
What is
RAID 1?
RAID 1 mirrors or duplicates the
contents of one drive on another equally-sized drive. Mirroring provides
optimal data integrity and immediate access to your data if one drive fails.
The Iomega StorCenter Pro only supports two-drive RAID 1 configurations. The
RAID capacity is half the physical capacity of the two drives.
What is
RAID 5?
RAID 5 is the factory setting of
your Iomega StorCenter Pro. RAID 5 provides the best balance of data redundancy
and disk capacity. Like RAID 0, RAID 5 stripes all of the available disks into
one large volume; however, the space equivalent to one hard drive will be used
to store parity data. If a hard drive fails, the Iomega StorCenter Pro will
rebuild your files using the parity data. RAID 5 requires at least 3 hard
drives.
