Thecus i8500, Руководство пользователя

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capture. The certain location, named as “Snap VD”, is essentially a new
VD.which can be attached to a LUN provisioned to a host as a disk like other
ordinary VDs in the system. Rollback restores the data back to the state of any
time which was previously captured in case for any unfortunate reason it might
be (e.g. virus attack, data corruption, human errors and so on). Snap VD is
allocated within the same RG in which the snapshot is taken, we suggest to
reserve 20% of RG size or more for snapshot space.
4.4.1 Create snapshot volume
To take a snapshot of the data, please follow the procedures.
1. Select
“/ Volume configuration / Virtual disk”
.
2. Mouse moves to the gray button next to the VD number; click
“Set
snapshot space”
.
3. Set up the size for snapshot. The minimum size is suggested to be
20%
of VD size, then click “ “. It will go back to the
VD page and the size will show in snapshot column. It may not be the
same as the number entered because some size is reserved for
snapshot internal usage. There will be 2 numbers in
“Snapshot (MB)”
column. These numbers mean
“Used snapshot space”
and
“Total
snapshot space”
.
4. There are two methods to take snapshot. In
“/ Volume configuration /
Virtual disk”
, mouse moves to the gray button next to the VD number;
click
“Take snapshot”
. Or in
“/ Volume configuration / Snapshot”
,
click “ ”.
5. Enter a snapshot name, then click “ ”. A snapshot
VD is created.
6. Select
“/ Volume configuration / Snapshot”
to display all snapshot
VDs related to the VD.
Caution
Snapshot / rollback features need
512MB
RAM at least. Please
also refer to RAM certification list in Appendix A.