Overland Storage Snapshot SnapSAN User Manual page 281

SnapSAN S3000/S5000 Snapshot User Guide
• Management area per SDV = m MB (m: 1 or 32 depending on the disk array type)
*1:Data area = User-specified capacity
*2:Management area = 2 GB + m MB (There is no SV at the time of binding.)
*3:If the capacity of SDV(N-1) is 256 MB or less, an LD of less than 256 MB cannot be
bound. This is corrected as follows.
SDV(N-2) capacity = 2046 GB - (256 MB - SDV(N-1) capacity)
SDV(N-1) capacity = 256 MB
SnapSAN Manager allows you to specify all the free space of the pool when binding the
snapshot reserve area. In this case, the equations shown above assume that the total of the
data area and management area is the free space of the pool.
In the following examples, the size of the management area per SDV is 1 MB.
Example 1:
When the user-specified capacity is 1600 GB
Data area = 1600 GB
Example 2:
When the user-specified capacity is 2044 GB
(In this case, SDV(0) capacity = 2046 GB and SDV(1) capacity = 2 MB, which requires
correction.)
Data area = 2044 GB
Example 3:
When the user-specified capacity is 2045 GB
Data area = 2045 GB
Example 4:
When all the free space of the pool is specified (free pool space = 2000 GB*1)
10400422-002 02/2013
©2013 Overland Storage, Inc.
Snapshot Reserve Area
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