Compaq ProLiant 1000 User Guide: Online Storage Controller Recovery Option - Page 24

Single-Channel Configuration

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 24 highlights

2-6 Functionality and Configuration Options The combination of OSCRO and RAID 1 provides all the advantages of traditional disk duplexing. This combination provides the additional advantage of implementing all the fault tolerance features at the hardware level, thus eliminating the overhead associated with implementing fault tolerance in the software. Pairing redundant SMART-2 Array Controllers with RAID 5 disk arrays provides the data protection of the RAID implementation and the fault tolerance of redundant controllers. Conceptually, there are two ways to configure an OSCRO implementation: single channel and dual channel. OSCRO can also be set up in more complex combinations of single-channel and/or dual-channel configurations. Single-Channel Configuration The simplest OSCRO configuration involves two SMART-2 Array Controllers and a single ProLiant Storage System/F or /U equipped with the Recovery Server Switch. The Compaq Online Storage Controller Recovery Utility is used to merge the independent controllers into a controller pair. One controller is the active controller, and the other is designated the standby controller. Both controllers are physically wired to the ProLiant Storage System/F or /U through the Recovery Server Switch, as illustrated in Figure 2-2. Any two SMART-2 controllers with the same channel count can be used to form a basic controller pair. When using a single-channel controller, such as the SMART-2SL, the single-channel configuration is the only feasible OSCRO configuration. IMPORTANT: If you already have the Recovery Server Option (RSO) installed from an earlier version of the Recovery Server Option kit, you must disable that option, upgrade the Recovery Server Switch in the ProLiant Storage System/F or /U, and reconfigure the cabling in order to implement OSCRO. RSO and OSCRO cannot be implemented in the same devices at the same time.

  • 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
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
2-6
Functionality and Configuration Options
The combination of OSCRO and RAID 1 provides all the advantages of
traditional disk duplexing. This combination provides the additional advantage
of implementing all the fault tolerance features at the hardware level, thus
eliminating the overhead associated with implementing fault tolerance in the
software.
Pairing redundant SMART-2 Array Controllers with RAID 5 disk arrays
provides the data protection of the RAID implementation and the fault tolerance
of redundant controllers.
Conceptually, there are two ways to configure an OSCRO implementation:
single channel and dual channel. OSCRO can also be set up in more complex
combinations of single-channel and/or dual-channel configurations.
Single-Channel Configuration
The simplest OSCRO configuration involves two SMART-2 Array Controllers
and a single ProLiant Storage System/F or /U equipped with the Recovery
Server Switch. The Compaq Online Storage Controller Recovery Utility is used
to merge the independent controllers into a controller pair. One controller is the
active controller, and the other is designated the standby controller. Both
controllers are physically wired to the ProLiant Storage System/F or /U through
the Recovery Server Switch, as illustrated in Figure 2-2.
Any two SMART-2 controllers with the same channel count can be used to
form a basic controller pair. When using a single-channel controller, such as the
SMART-2SL, the single-channel configuration is the only feasible OSCRO
configuration.
IMPORTANT:
If you already have the Recovery Server Option (RSO)
installed from an earlier version of the Recovery Server Option kit, you must
disable that option, upgrade the Recovery Server Switch in the ProLiant
Storage System/F or /U, and reconfigure the cabling in order to implement
OSCRO. RSO and OSCRO cannot be implemented in the same devices at the
same time.