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26 Getting started
About storage-space color codes
SMU panels use the following color codes to identify how storage space is used.
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.
The second available spare can be an existing global spare, another existing spare for the vdisk, or a
replacement disk that you designate as a spare or that is automatically taken when dynamic sparing is
enabled.
During reconstruction, you can continue to use the vdisk. When a global spare replaces a disk in a vdisk,
the global spare’s icon in the enclosure view changes to match the other disks in that vdisk.
NOTE: Reconstruction can take hours or days to complete, depending on the vdisk RAID level and size,
disk speed, utility priority, and other processes running on the storage system. You can stop reconstruction
only by deleting the vdisk.
Table 9 Storage-space color codes
Area Color Meaning
Overview panels Total space
Available/free space
Used space
Reserved space, used for parity and snap pools, for example
Vdisk panels Space used by spares
Wasted space, due to use of mixed disk sizes