VessRAID 1000i Series Product Manual
264
RAID Level Migration
To migrate a disk array is to do one or both:
• Change its RAID level
• Increase the number of disk drives (sometimes called Expansion)
On VessRAID, RAID level migration is performed on the disk array but it applies
to the logical drives. Migration takes place on an existing Functional disk array
without disturbing the existing data. While the disk array is migrating, you can
access the data as before. When migration is complete, your disk array will have
a different RAID level and/or a larger capacity.
In most cases, you must add one or more physical drives during the migration
process. You can never reduce the number of physical drives.
The tables below show the migration options for a source logical drive according
to its RAID level. The available target RAID levels are shown with their
requirements.
See “Migrating a Disk Array” on page 122 or page 165.
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