Compaq ProLiant 1000 User Guide: Online Storage Controller Recovery Option - Page 28

Internal vs. External Boot Device

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 28 highlights

2-10 Functionality and Configuration Options The number of possible controller pairs may be limited by the number of knockout panels or slots (see Figure 3-6) available on the server as well as the number of available expansion slots for SMART-2 controllers. Some older ProSignia servers have only one knockout panel with four slots. Such systems are limited to implementing two dual-channel configurations. NOTE: Newer ProLiant servers have knockout slots built in to the case and do not require installation of the knockout panel assembly. Internal vs. External Boot Device OSCRO implementation does not require you to include the boot device controller in an OSCRO controller pair. There are advantages to doing so, and there are advantages to not doing so. Having the operating system on a drive protected by an OSCRO controller pair protects the operating system as well as the data on the disks. There are, however, boot device considerations with OSCRO. For a discussion of these, see the "Boot Device Configuration Planning" section in Chapter 3. One way to improve performance is to segregate system I/O traffic from application I/O traffic. This can be achieved by creating a separate OSCRO controller pair for the boot device controller, or by leaving the boot device controller as a standalone device. When the embedded SCSI controller is used as the boot device controller, segregation of I/O traffic is achieved, but OSCRO does not allow use of the embedded SCSI controller in a controller pair.

  • 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
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
2-10
Functionality and Configuration Options
The number of possible controller pairs may be limited by the number of
knockout panels or slots (see Figure 3-6) available on the server as well as the
number of available expansion slots for SMART-2 controllers. Some older
ProSignia servers have only one knockout panel with four slots. Such systems
are limited to implementing two dual-channel configurations.
NOTE
:
Newer ProLiant servers have knockout slots built in to the case and do not
require installation of the knockout panel assembly.
Internal vs. External Boot Device
OSCRO implementation does not require you to include the boot device
controller in an OSCRO controller pair. There are advantages to doing so, and
there are advantages to not doing so.
Having the operating system on a drive protected by an OSCRO controller pair
protects the operating system as well as the data on the disks. There are,
however, boot device considerations with OSCRO. For a discussion of these,
see the “Boot Device Configuration Planning” section in Chapter 3.
One way to improve performance is to segregate system I/O traffic from
application I/O traffic. This can be achieved by creating a separate OSCRO
controller pair for the boot device controller, or by leaving the boot device
controller as a standalone device. When the embedded SCSI controller is used
as the boot device controller, segregation of I/O traffic is achieved, but OSCRO
does not allow use of the embedded SCSI controller in a controller pair.