Compaq ProLiant 1000 User Guide: Online Storage Controller Recovery Option - Page 23

Table 2-2, SMART-2 Array Controller Configuration Options

Get Compaq ProLiant 1000 PDF manuals and user guides View all Compaq ProLiant 1000 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 23 highlights

2-5 SMART-2 Array Controllers implement RAID fault tolerance at the hardware level, eliminating the overhead associated with implementing RAID in the software. Another advantage of implementing RAID at the hardware level is the ability to apply any of the RAID configuration options to the system disk, as indicated in Table 2-2. Table 2-2 SMART-2 Array Controller Configuration Options 0 No Fault Tolerance Yes Maximum availability of storage, no protection of data. 1 Drive Mirroring Yes Half the space given up for RAID overhead; half of the mirror set can fail without data loss. No system performance overhead, as write operations are performed by hardware. Recommended when data availability is most important. 5 Distributed Data Yes Lower percentage of space given up to RAID Guarding overhead; one device of the stripe set can fail without data loss. System performance may be improved by reducing disk latency. Recommended when data availability, cost, and performance are important criteria in I/O subsystem design. Using OSCRO with RAID 0 provides protection against failure of a SMART-2 Array Controller, but does not provide any data protection if a disk fails. Online Storage Controller Recovery Option User Guide

  • 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
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
2-5
Online Storage Controller Recovery Option User Guide
SMART-2 Array Controllers implement RAID fault tolerance at the hardware
level, eliminating the overhead associated with implementing RAID in the
software. Another advantage of implementing RAID at the hardware level is
the ability to apply any of the RAID configuration options to the system disk, as
indicated in Table 2-2.
Table 2-2
SMART-2 Array Controller Configuration Options
±²³´
µ¶·¶¸
´¶¹º»¼½¾¼¿À
²·Á¼¸Á¸¶
ÿ»ÄÅƹ¾¶Ç
´¼¹È
É¿ÇǶÀ¾¹ÄÁÀÊı¶º¿ÇǶÀÊÁ¾¼¿À¹
0
No Fault Tolerance
Yes
Maximum availability of storage, no
protection of data.
1
Drive Mirroring
Yes
Half the space given up for RAID overhead;
half of the mirror set can fail without data
loss. No system performance overhead, as
write operations are performed by
hardware.
Recommended when data
availability is most important.
5
Distributed Data
Guarding
Yes
Lower percentage of space given up to RAID
overhead; one device of the stripe set can
fail without data loss. System performance
may be improved by reducing disk latency.
Recommended when data availability, cost,
and performance are important criteria in I/O
subsystem design.
Using OSCRO with RAID 0 provides protection against failure of a SMART-2
Array Controller, but does not provide any data protection if a disk fails.