Compex SCSI TO S-ATA RAID Spécifications Page 15

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SCSI to SATA RAID Subsystem | Administrator’s Manual RAID Functions: Introduction | en 15
Bosch Security Systems F.01U.027.802 | V1 | 2006.11
1.4 Spare Drives
1.4.1 Local Spare Drives
A Local Spare Drive is a standby drive assigned to serve one specified logical drive. When a
member drive of this specified logical drive fails, the Local Spare Drive becomes a member
drive and automatically starts to rebuild.
Fig. 1.9 Local (Dedicated) Spare
1.4.2 Global Spare Drives
A Global Spare Drive serves more than one specified logical drive. When a member drive from
any of the logical drives fails, the Global Spare Drive will join that logical drive and automati-
cally start to rebuild.
Fig. 1.10 Global Spare
The example on the left provides both Local Spare Drive and Global Spare Drive functions. On
certain occasions, applying these two functions together will better fit various needs. Take
note that the Local Spare Drive always has higher priority than the Global Spare Drive.
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