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Volume state changes to DOWN when volume is
unmounted ..................................................................... 96
Errors, delayed response, hangs ................................................ 97
Viewing disk errors and events ....................................................... 97
Deduplication event codes and messages .......................................... 97
Chapter 8 Disaster recovery ............................................................... 103
Preparing for disaster ................................................................. 103
Moving images off-site ................................................................ 103
Recovering from a deduplication storage server disk failure ............... 104
Recovering from a permanent deduplication storage server
failure ................................................................................ 105
Recovering the storage server after NetBackup catalog recovery ......... 107
Chapter 9 Deduplication architecture .............................................. 109
Deduplication server components .................................................. 109
Media server deduplication process ............................................... 111
Deduplication client components .................................................. 114
Deduplication client backup process .............................................. 114
About deduplication fingerprinting ............................................... 117
Data removal process .................................................................. 118
Index ................................................................................................................... 119
Contents10