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CLONE mode works the same way as RAID 1, by maintaining a complete
copy of the entire set of data on each drive.
LARGE (Spanned set)
Number of drives: at least 2
Unit capacity: 100% of all drives together regardless of differences in size
Spares: no
Fault tolerance: cannot withstand the loss of any drives without losing data.
However, some data may be recovered as long as the drive(s) carrying the
file system data (boot record, directory, etc.) remain online.
LARGE mode is neither a RAID nor is it a JBOD. It works by declaring the
sum of all available space of the member drives as a single unit, without
striping the data. As each member is filled, new data is stored on the next.
Notes about Spare Drives
If EZ mode is disabled (SW1:2 ON), all individual drives not configured as
array members will be offered to the host adapter as separate units.
To create an array with one or more spares, set or modify the RAID mode
using fewer than 5 members, while the spares are disconnected from the
Port Multiplier. When EZ mode is enabled, individual drives connected when
an array is present are considered spare.
Spare drives must be equal to or larger in size than the smallest member.
When any type of array is defined, individual units will be considered spare.
RAID 0 and LARGE arrays are not fault-tolerant and spare drives will not be
useful; therefore, disabling EZ for these arrays is recommended.
When a spare drive is present and a fault-tolerant RAID (1, 10, 3, or 5) is
defined, EZ mode will automatically rebuild any available spares into the
array.
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