HP EVA4000 HP StorageWorks 4000/6000/8000 Enterprise Virtual Array User Guide - Page 33

Enterprise Virtual Array, operation - eva 4000 performance

Get HP EVA4000 PDF manuals and user guides View all HP EVA4000 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 33 highlights

3 Enterprise Virtual Array operation This chapter presents the tasks that you might need to perform during normal operation of the storage system. Best practices For useful information on managing and configuring your storage system, refer to the HP StorageWorks Enterprise Virtual Array configuration best practices white paper available from http://h71028.www7.hp.com/ERC/downloads/5982-9140EN.pdf. Operating tips and information Reserving adequate free space To ensure efficient storage system operation, a certain amount of unallocated capacity, or free space, should be reserved in each disk group. The recommended amount of free space is influenced by your system configuration. For guidance on how much free space to reserve, refer to the HP StorageWorks Enterprise Virtual Array configuration best practices white paper. See Best practices. Failback preference setting for HSV controllers Table 3 describes the failback preference mode for each of the operating systems supported with HSV controllers and Command View EVA. Table 4 describes the failback default behavior and settings allowed for each operating system. The table indicates when Secure Path is used in conjunction with the operating system Table 3 Failback preference settings Setting Point in time Behavior No preference At initial presentation The units are alternately brought online to Controller A or to Controller B. On dual boot or controller resynch On controller failover If cache data for a LUN exists on a particular controller, the unit will be brought online there. Otherwise, the units are alternately brought online to Controller A or to Controller B. All LUNs are brought online to the surviving controller. On controller failback All LUNs remain on the surviving controller. There is no failback except if a host moves the LUN using SCSI commands. 4000/6000/8000 Enterprise Virtual Array user guide 33

  • 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
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
3 Enterprise Virtual Array
operation
This chapter presents the tasks that you might need to perform during normal operation of the storage
system.
Best practices
For useful information on managing and con
fi
guring your storage system, refer to the
HP
StorageWorks Enterprise Virtual Array con
fi
guration best practices
white paper available from
h
t
t
p
:
/
/
h
7
1
0
2
8
.
w
w
w
7
.
h
p
.
c
o
m
/
E
R
C
/
d
o
w
n
l
o
a
d
s
/
5
9
8
2
-
9
1
4
0
E
N
.
p
d
f
.
Operating tips and information
Reserving adequate free space
To ensure ef
fi
cient storage system operation, a certain amount of unallocated capacity, or free space,
should be reserved in each disk group. The recommended amount of free space is in
fl
uenced by your
system con
fi
guration. For guidance on how much free space to reserve, refer to the
HP StorageWorks
Enterprise Virtual Array con
fi
guration best practices
white paper. See
Best practices
.
Failback preference setting for HSV controllers
Table 3
describes the failback preference mode for each of the operating systems supported with HSV
controllers and Command View EVA.
Table 4
describes the failback default behavior and settings allowed for each operating system. The table
indicates when Secure Path is used in conjunction with the operating system
Table 3 Failback preference settings
Setting
Point in time
Behavior
At initial presentation
The units are alternately brought online
to Controller A or to Controller B.
On dual boot or controller resynch
If cache data for a LUN exists on a
particular controller, the unit will be
brought online there. Otherwise, the
units are alternately brought online to
Controller A or to Controller B.
On controller failover
All LUNs are brought online to the
surviving controller.
No preference
On controller failback
All LUNs remain on the surviving
controller. There is no failback except
if a host moves the LUN using SCSI
commands.
4000/6000/8000 Enterprise Virtual Array user guide
33