DataDirect Networks EF2800, User Manual

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DataDirect Networks EF2800 FC RAID Storage System User Guide (V 1.0)
C r e a t i n g a n d M a n a g i n g A r r a y s & P a r t i t i o n s
D.2.6 Expanding Array Capacity
You can expand array capacity without stopping I/O activity, so you can
continue using the array while the expansion process runs. You can
only expand one array at a time.
Notes :
• Expanding an array here does not change the size of the host
operating system partitions that reside on the array, because the
RAID controller is working at the block level not the file system
level of the operating system. To use the new space, you must
create a new operating system partition using the newly added
space or use a third-party application specific to the operating
system to change the partition size.
• How you create a new partition or resize an existing one depends
upon the operating system. Most operating systems cannot resize
an existing partition. Refer to your operating system
documentation.
The number of drives you can add to an array depends upon the RAID
level as shown in
Figure 110 . You also cannot exceed the maximum
number of drives for each RAID level (see section D.1 , "Creating
Arrays" on page 205 ).
Figure 110. Drive additions by RAID level
RAID Level Number of drives you can add Max. # of drives
RAID 0 1 to 4 at a time up to the maximum 16
RAID 1 (Mirrored) Cannot expand N/A
Volume Set Cannot expand N/A
RAID 10 2 or 4 at a time up to the maximum 16
RAID 3, 4, or 5 1 to 4 at a time up to the maximum 16
RAID 50 You can expand the array, one RAID 5
array at a time up to the maximum
number of drives. All RAID 5 arrays
must contain the same number of
drives. 32