Rocstor GUARDIAN 4RT, Руководство по установке и настройке

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ROCSECURE – Guardian 4RT Secure Raid System User Manual Page | 109
writes. The operating system can instantly access the newly created Volume Sets without waiting
for the initialization to be completed. One disadvantage of this is that the initialization process
takes longer. In Foreground Mode initialization, the initialization process is faster but must be
completed first before the Volume Set is ready for system access.
Array Roaming
The RAID stores configuration information both in NVRAM and on the disk drives. This
protects the configuration settings in the case of a disk drive or controller failure. Array
roaming allows the administrator the ability to move a complete Raid Set to another system
without losing RAID configuration and data on that Raid Set. If a RAID enclosure fails to
work, the Raid Set disk drives can be moved to another enclosure and inserted in any order.
Online Capacity Expansion
Online Capacity Expansion makes it possible to add one or more physical drives to a Raid
Set, while the server is in operation, eliminating the need to backup and restore after
reconfiguring the Raid Set. When disks are added to a Raid Set, unused capacity is added at
the end of the Raid Set. Data on the existing Volume Sets residing on that Raid Set is
redistributed evenly across all the disks. A contiguous block of unused capacity is made
available on the Raid Set. The unused capacity can be used to create an additional Volume
Set. The expansion process is illustrated as follows:
The RAID controller redistributes the original Volume Set over the original and newly added
disks, using the same RAID level configuration. The unused capacity on the expanded Raid
Set can then be used to create an additional Volume Set, with a different RAID level setting
as needed by the user.