Raid 1 – CalDigit RAIDShield User Manual
Page 36
35
35
RAID 1:
RAID 1 is commonly referred to as Disk Mirroring, Disk Shadowing or Disk Duplexing as all data is duplicated across
both disks. RAID 1 can only be performed with two hard drives (with four drives, RAID 0+1 is configured automatically).
As data is identical on both disks, storage capacity is that of the smaller disk. RAID 1 has poor performance for write
operations but very high performance for read intensive operations.
RAID 1: Mirroring
Characteristics: Recommended
use:
Better Read transaction rate then single disks,
same Write transaction rate as single disks.
100% redundancy of data means no rebuild of
data is necessary in case of disk failure, just a
copy to the replacement disk.
All the disks have the same data.
RAID level 1 requires two drives.
Storage capacity = Capacity of smaller disk
Accounting
Payroll
Financial
Any application
requiring high
availability
Arrangement of data blocks saved on a Level 1 array