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Compaq Infortrend Manuale Utente

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Functional Description
   1-6
Logical Drive
1
2
3
X
LS
Local
Spare
Drive
When one member
drive fails, the Local
Spare Drive joins the
logical drive and
automatically starts
to rebuild.
Logical Drive 0
Global Spare Drive
1
2
3
GS
Logical Drive 1
1
2
Logical Drive 2
1
2
3
4
Global Spare Drive
GS
1.4
Spare Drives
Global and Local Spare Drives
Figure 1 - 9 Local (Dedicated) Spare
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.
Figure 1 - 10 Global Spare
Global Spare Drive not only
serves one specified logical
drive. When a member drive
from any of the logical drive
fails, the Global Spare Drive will
join that logical drive and
automatically starts to rebuild.
Figure 1 - 11 Global Spare Rebuild
The external RAID controllers provide
both Local Spare Drive and Global
Spare Drive functions. On certain
occasions, applying these two
functions together will better fit
various needs. Take note though that
the Local Spare Drive always has
higher priority than the Global Spare
Drive.
Global Spare Drives serve
any logical drive.
When a member drive from
any logical drive fails, the
Global Spare Drive joins
that logical drive and
automatically starts to
rebuild.