In the case of RAID 1 (Mirroring), the same data is written in parallel onto two hard disks. RAID 1 thus increases data safety, and in the case of one hard disk crashing you can simply switch to the second one and continue working.
(data mirroring) - data is duplicated on two drives either through software or hardware. Provides faster read performance than a single drive and good fault tolerance.
Redundant Array of Inexpensive Disks – mirrored array. Independent data paths allow for complete disk duplication or data mirroring in this architecture. This level introduces redundancy in the sense that there are two copies of all data; this complete duplication also doubles the cost per megabyte. The speed of transfers is faster than a single drive because of the overlapping of reads and parallel writes. Access time can also be improved through accessing either copy of the data. Additional costs also derive from custom controllers and/or operating system changes. See also RAID.
Disk mirroring. Good performance. Fault tolerant. Only fault tolerant option if using 2 drives.
See Mirrored volume (RAID-1).
Another popular redundancy method. Requires a minimum of two hard drives that store exactly the same data. If one drive fails the array is broken but no data is lost.
Mirrored arrays: information written to one disk is also written to another simultaneously.
Mirroring. The only RAID that can only use 2 drives, they mirror each other. Very safe. Read performance is improved because whichever drive is closest to the data can be used to access it.
All data is 100% mirrored (duplicated) on a drive of equivalent size.
There are two forms of RAID 1: disk duplexing and disk mirroring. Disk mirroring involves two hard drives that are on the same drive controller. The same...
This provides mirroring of data across the system and offers minor redundancy.
RAID 1 implements disk mirroring where a copy of the same data is recorded onto two sets of striped drives. By keeping two copies of data on separate disks or arrays, data is protected against a disk failure. If, at any time, a disk on either side fails, the good disks can provide all of the data needed, thus preventing downtime. In disk mirroring, the total disk capacity is equivalent to half the sum of the capacities of all drives in the combination. Thus, combining four 1GB drives, for example, would create a single logical drive with a total disk capacity of 2GB. This combination of drives appears to the system as a single logical drive. RAID 1 is simple and easy to implement; however, it is more expensive as it doubles the investment required for a non-redundant disk array implementation.
RAID 1(0+1) combines RAID 0 and RAID 1 - Mirroring and Disk Striping. RAID (0+1) allows multiple drive failure because of the full redundancy of the hard disk drives. If more than two hard disk drives are chosen for RAID 1, RAID (0+1) will be performed automatically. IMPORTANT: RAID (0+1) will not appear in the list of RAID levels supported by the controller. If you wish to perform RAID 1, the controller will determine whether to perform RAID 1 or RAID (0+1). This will depend on the drive number that has been selected for the logical drive.
same as mirroring. "RAID 1" usually means "disk mirroring by itself" not combined with any other array technique. Self Managed Backups, here you can manage your own site backups or schedule backups. Email and database will also be backed up.
Also known as data mirroring, RAID 1 functionality maintains identical copies of data on different disks in an array. Duplicating data provides high data availability. In addition, RAID 1 improves the disk read performance, because data can be read from two locations. However, RAID 1 decreases disk write performance, because data must be written twice. Mirroring disks requires 2 disks.
A RAID 1 creates an exact copy (or mirror) of a set of data on two or more disks. This is useful when read performance is more important than minimizing the storage capacity used for redundancy. The array can only be as big as the smallest member disk, however. A classic RAID 1 mirrored pair contains two disks, which increases reliability by a factor of two over a single disk, but it is possible to have many more than two copies. Since each member can be addressed independently if the other fails, reliability is a linear multiple of the number of members. To truly get the full redundancy benefits of RAID 1, independent disk controllers are recommended, one for each disk.
