D-Link DSN-6410 User Manual for DSN-6410 - Page 89

VD extension, Snapshot

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5.3 VD extension To extend VD size, please follow the procedures. 1. Select "/ Volume configuration / Virtual disk". 2. Check the gray button next to the VD number; click "Extend". 3. Change the size. The size must be larger than the original, and then click "OK" to start extension. Figure 5.3.1 4. Extension starts. If VD needs initialization, it will display an "Initiating" in "Status" and complete percentage of initialization in "R%". Figure 5.3.2 Tips The size of VD extension must be larger than original. Caution VD Extension cannot be executed during rebuilding or migration. 5.4 Snapshot Snapshot-on-the-box captures the instant state of data in the target volume in a logical sense. The underlying logic is Copy-on-Write -- moving out the data which would be written to certain location where a write action occurs since the time of data 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 89

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89
5.3
VD extension
To extend VD size, please follow the procedures.
1.
Select
“/ Volume configuration / Virtual disk”
.
2.
Check the gray button next to the VD number; click
“Extend”
.
3.
Change the size. The size must be larger than the original, and then click
“OK”
to
start extension.
Figure 5.3.1
4.
Extension starts. If VD needs initialization, it will display an
“Initiating”
in
“Status”
and complete percentage of initialization in
“R%”
.
Figure 5.3.2
Tips
The size of VD extension must be larger than original.
Caution
VD Extension cannot be executed during rebuilding or migration.
5.4
Snapshot
Snapshot-on-the-box
captures the instant state of data in the target volume in a logical
sense. The underlying logic is Copy-on-Write -- moving out the data which would be
written to certain location where a write action occurs since the time of data 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