HP StorageWorks P2000 HP StorageWorks P2000 G3 MSA System SMU Reference Guide - Page 34

About Configuration View icons, About vdisk reconstruction

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About Configuration View icons The Configuration View panel uses the following icons to let you view physical and logical components of the storage system. Table 10 Configuration View icons Icon Meaning Show all subcomponents Hide all subcomponents Show the component's subcomponents Hide the component's subcomponents Storage system Enclosure Host/initiator Vdisk Volume Snapshot Snap pool Replication-prepared volume Local replication source volume Local replication destination volume Local replication image Remote replication source volume Remote replication destination volume Remote replication image About vdisk reconstruction If one or more disks fail in a redundant vdisk (RAID 1, 3, 5, 6, 10, or 50) and properly sized spares are available, the storage system automatically uses the spares to reconstruct the vdisk. Vdisk reconstruction does not require I/O to be stopped, so the vdisk can continue to be used while the Reconstruct utility runs. A properly sized spare is one whose capacity is equal to or greater than the smallest disk in the vdisk. If no properly sized spares are available, reconstruction does not start automatically. To start reconstruction manually, replace each failed disk and then do one of the following: • Add each new disk as either a dedicated spare or a global spare. Remember that a global spare might be taken by a different critical vdisk than the one you intended. • Enable the Dynamic Spare Capability option to use the new disks without designating them as spares. Reconstructing a RAID-6 vdisk to a fault-tolerant state requires two properly sized spares to be available. • If two disks fail and only one properly sized spare is available, an event indicates that reconstruction is about to start. The Reconstruct utility starts to run, using the spare, but its progress remains at 0% until a second properly sized spare is available. • If a disk fails during online initialization, the initialization fails. In order to generate the two sets of parity that RAID 6 requires, the controller fails a second disk in the vdisk, which changes the vdisk status to Critical, and then assigns that disk as a spare for the vdisk. The Reconstruct utility starts to run, using the spare, but its progress remains at 0% until a second properly sized spare is available. 34 Getting started

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34
Getting started
About Configuration View icons
The Configuration View panel uses the following icons to let you view physical and logical components of
the storage system.
About vdisk reconstruction
If one or more disks fail in a redundant vdisk (RAID 1, 3, 5, 6, 10, or 50) and properly sized spares are
available, the storage system automatically uses the spares to reconstruct the vdisk. Vdisk reconstruction
does not require I/O to be stopped, so the vdisk can continue to be used while the Reconstruct utility runs.
A properly sized spare is one whose capacity is equal to or greater than the smallest disk in the vdisk. If no
properly sized spares are available, reconstruction does not start automatically. To start reconstruction
manually, replace each failed disk and then do one of the following:
•
Add each new disk as either a dedicated spare or a global spare. Remember that a global spare might
be taken by a different critical vdisk than the one you intended.
•
Enable the Dynamic Spare Capability option to use the new disks without designating them as spares.
Reconstructing a RAID-6 vdisk to a fault-tolerant state requires two properly sized spares to be available.
•
If two disks fail and only one properly sized spare is available, an event indicates that reconstruction is
about to start. The Reconstruct utility starts to run, using the spare, but its progress remains at 0% until a
second properly sized spare is available.
•
If a disk fails during online initialization, the initialization fails. In order to generate the two sets of
parity that RAID 6 requires, the controller fails a second disk in the vdisk, which changes the vdisk
status to Critical, and then assigns that disk as a spare for the vdisk. The Reconstruct utility starts to run,
using the spare, but its progress remains at 0% until a second properly sized spare is available.
Table 10
Configuration View icons
Icon
Meaning
Show all subcomponents
Hide all subcomponents
Show the component’s subcomponents
Hide the component’s subcomponents
Storage system
Enclosure
Host/initiator
Vdisk
Volume
Snapshot
Snap pool
Replication-prepared volume
Local replication source volume
Local replication destination volume
Local replication image
Remote replication source volume
Remote replication destination volume
Remote replication image