User Manual

Pegasus2 R4/R6/R8 Product Manual Contents
technology bAckground 88
disk arrays 89
mediA PAtrol 89
Pdm 90
LogicaL drives 91
rAid levels 91
rAiD 0 – StriPe 91
rAiD 1 – Mirror 93
rAiD 1e – enhAnceD Mirror 94
rAiD 5 – BlocK AnD PArity StriPe 95
rAiD 6 – BlocK AnD DouBle PArity StriPe 96
rAiD 10 – Mirror + StriPe 97
rAiD 50 – StriPing of DiStriButeD PArity 98
rAiD 60 – DouBle PArity + StriPe 100
rAid level migrAtion 101
MigrAtion requireMentS 101
Source AnD tArget rAiD levelS 101
striPe size 106
sector size 107
initiAlizAtion 107
ForMatting LogicaL drives 108
ProMiSe utility with DefAult SettingS 108
ProMiSe utility with cuStoM SettingS 109
DiSK utility 110
sPare drives 111
definition 111
oPtions 111
requirements 112
trAnsition 112
running A trAnSition 112
raid controLLers 116
reAD cAche Policy 116
write cAche Policy 116
cAPAcity coercion 117
troubleshooting 118
resPonding to An Audible AlArm 118
cHecking Leds 119
SuBSySteM leDS 119
Drive cArrier leDS 120
Promise utility 121
viewing the event logs 121
viewing runtiMe eventS 121
viewing nvrAM eventS 122
event Severity DeScriPtionS 122
PHysicaL drive ProbLeMs 123
diAgnosis using the Promise utility 123
locAting A PhysicAl drive 124
rePlAcing A PhysicAl drive 125
PhySicAl Drive wArning MeSSAge 128
disk array and LogicaL drive ProbLeMs 129
disk ArrAy degrAded / logicAl drive criticAl 129
disk ArrAy offline / logicAl drive offline 130
rePAiring An offline DiSK ArrAy or logicAl Drive 130
rebuilding A disk ArrAy 131
incomPlete ArrAy 132
MigrAtion 132
trAnSPort 132
unreAdAble disk wArning 133
subsysteM ProbLeMs 134
diAgnosing A subsystem Problem 134
overheAting 135
fAn fAilure 135
inADequAte Air circulAtion 136
Power suPPly 136
connection ProbLeMs 137
cAbles 137
dAisy-chAins 138
PerForMance Monitor 139