HP ProLiant BL660c Configuring Arrays on HP Smart Array Controllers Reference - Page 72

Changing the Expand Priority setting, Changing the surface scan delay time

Get HP ProLiant BL660c PDF manuals and user guides View all HP ProLiant BL660c manuals
Add to My Manuals
Save this manual to your list of manuals

Page 72 highlights

• At the medium setting, rebuilding occurs for half of the time, and normal system operations occur for the rest of the time. • At the high setting, the rebuild takes precedence over all other system operations. If the logical drive is part of an array that has an online spare, rebuilding begins automatically when drive failure occurs. If the array does not have an online spare, rebuilding begins when the failed physical drive is replaced. Syntax: modify rp=high|medium|low|? where is a controller. Example command: => ctrl slot=3 modify rp=high Changing the Expand Priority setting The Expand Priority setting determines the urgency with which the controller treats an internal command to expand an array. • At the low setting level, normal system operations take priority over an array expansion. • At the medium setting, expansion occurs for half of the time, and normal system operations occur for the rest of the time. • At the high setting, the expansion takes precedence over all other system operations. Syntax: modify ep=high|medium|low|? where is a controller. Example command: => ctrl slot=3 modify ep=high Changing the surface scan delay time The setting for the surface scan delay determines the time interval for which a controller must be inactive before a surface scan analysis is started on the physical drives that are connected to it. Surface scan analysis is an automatic background process that ensures that you can recover data if a drive failure occurs. The scanning process checks physical drives in fault-tolerant logical drives for bad sectors, and in RAID 5 or RAID 6 (ADG) configurations, it also verifies the consistency of parity data. Syntax: modify ssd=# where is a controller and # is a number between 1 and 30. This number determines the delay time in seconds, but you do not need to include units with the command. Example command: => ctrl sn=P56350D9IP903J modify ssd=3 Re-enabling a failed logical drive If a logical drive has failed and the data on it is invalid or non-recoverable, you can re-enable the logical drive so that it can be reused. This process preserves the structure of the logical drive and merely deletes HP Array Configuration Utility 72

  • 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
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
HP Array Configuration Utility
72
•
At the medium setting, rebuilding occurs for half of the time, and normal system operations occur for
the rest of the time.
•
At the high setting, the rebuild takes precedence over all other system operations.
If the logical drive is part of an array that has an online spare, rebuilding begins automatically when
drive failure occurs. If the array does not have an online spare, rebuilding begins when the failed
physical drive is replaced.
Syntax:
<target> modify rp=high|medium|low|?
where
<target>
is a controller.
Example command:
=> ctrl slot=3 modify rp=high
Changing the Expand Priority setting
The Expand Priority setting determines the urgency with which the controller treats an internal command to
expand an array.
•
At the low setting level, normal system operations take priority over an array expansion.
•
At the medium setting, expansion occurs for half of the time, and normal system operations occur for
the rest of the time.
•
At the high setting, the expansion takes precedence over all other system operations.
Syntax:
<target> modify ep=high|medium|low|?
where
<target>
is a controller.
Example command:
=> ctrl slot=3 modify ep=high
Changing the surface scan delay time
The setting for the surface scan delay determines the time interval for which a controller must be inactive
before a surface scan analysis is started on the physical drives that are connected to it.
Surface scan analysis is an automatic background process that ensures that you can recover data if a
drive failure occurs. The scanning process checks physical drives in fault-tolerant logical drives for bad
sectors, and in RAID 5 or RAID 6 (ADG) configurations, it also verifies the consistency of parity data.
Syntax:
<target> modify ssd=#
where
<target>
is a controller and
#
is a number between 1 and 30. This number determines the delay
time in seconds, but you do not need to include units with the command.
Example command:
=> ctrl sn=P56350D9IP903J modify ssd=3
Re-enabling a failed logical drive
If a logical drive has failed and the data on it is invalid or non-recoverable, you can re-enable the logical
drive so that it can be reused. This process preserves the structure of the logical drive and merely deletes