D-Link DNS-321 User Manual - Page 48

What is RAID?, RAID 0 - speed

Get D-Link DNS-321 - Network Storage Enclosure Hard Drive Array PDF manuals and user guides
UPC - 790069314162
View all D-Link DNS-321 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 48 highlights

Section 3 - Configuration What is RAID? RAID, short for Redundant Array of Independent Disks, is a combination of two or more disks with the aim of providing fault tolerance and improving performance. There are several different levels of RAID, with each providing a different method of sharing or distributing data amongst the drives. The DNS-321 supports RAID levels 0 and 1. RAID 0 RAID 0 provides data striping, which spreads out blocks of data over both drives, but does not provide data redundancy. RAID 0 Although performance is improved, the lack of fault tolerance means that if one drive fails, all data in the array will be lost. RAID 1 RAID 1 provides mirroring over both disks, with the same read/write speed of a single disk. A RAID 1 array can only be as large as it's smallest member disk. Because the data is stored on both disks, RAID 1 provides fault tolerance and protection, in addition to performance advantages. RAID 1 D-Link DNS-321 User Manual 48

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
²¶
D-Link DNS-3±1 User Manual
Section 3 - Configuration
What is RAID?
RAID, short for Redundant Array of Independent Disks, is a combination of two or more disks with the aim of providing
fault tolerance and improving performance.
There are several different levels of RAID, with each providing a different
method of sharing or distributing data amongst the drives. The DNS-321 supports RAID levels 0 and 1.
RAID 0
RAID 0 provides
data striping
, which spreads
out blocks of data over both drives, but does not
provide data redundancy.
Although performance is improved, the lack of
fault tolerance means that if one drive fails, all
data in the array will be lost.
RAID 0
RAID 1
RAID 1 provides
mirroring
over both disks, with
the same read/write speed of a single disk.
A
RAID 1 array can only be as large as it’s smallest
member disk.
Because the data is stored on both disks,
RAID 1 provides fault tolerance and protection,
in addition to performance advantages.
RAID 1