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4.4.1
Create snapshot volume
To take a snapshot of the data, please follow the procedures.
1. Select
“/ Volume config / User data volume”
.
2. Choose a UDV to execute the snapshot by clicking the blue square
button “
” in the
“Snapshot (MB)”
column, it will direct to a setup
page.
3. Set up the size for executing snapshot. The size is suggested to be
20%
of UDV size or more, then click “
“. It will go back to
the UDV page and the size will be shown in snapshot column. It may
not be the same as the number entered because some space is
reserved for snapshot internal usage. There will be 2 numbers in
“Snapshot (MB)”
column. These numbers mean
“Free snapshot
space”
and
“Total snapshot space”
.
4. Choose a UDV by clicking the checkbox of the row and then click
“
”.
5. A snap UDV is created with the date and time taken snapshot of the
chosen UDV.
6. Attach LUN to UDV, please refer to section 3.5.6 for more detail.
7. Done. It can be used as a disk.
Figure 4.4.1.1
(Figure 4.4.1.1: No.1 is a RAID 0 UDV. Set snapshot space to 24957MB. And now its space
is free to snapshot. No.2 is a snap UDV taken on 11/10 18:02:46.)
Snapshot has some constraints as described in the following:
