D-Link DSN-656 User Manual - Page 96

Thin Provisioning, The extension size must be larger than the current size of the virtual disk.

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D-Link Document - User Manual 3. Change the virtual disk size. The size must be larger than the current, and then click the OK button to start extension. 4. Extension starts. If the virtual disk needs initialization, it will display the status Initiating and the complete percentage of initialization in R%. TIP: The extension size must be larger than the current size of the virtual disk. CAUTION: The extension cannot be executed during rebuilding or migration. Thin Provisioning Thin provisioning is a hot topic in the IT management and storage industry. When we think of thin provisioning, it naturally brings to our minds the opposite term - fat provisioning, which is the traditional way IT administrators allocate storage space. Each logical volume is used by an application or a group of users. When it comes to the point to decide how much space a logical volume requires for three years or for the lifetime of an application, it's really hard to make the prediction correctly and precisely. To avoid the complexity of adding more space to the volumes frequently, IT administrators end up allocating more storage space to each logical volume than it needs in the beginning. This is why it's called "fat" provisioning. Usually it turns out that a lot of free space is sitting around idle. This stranded capacity is wasted, which equals to waste of investment and inefficiency. Various studies indicate that as much as 75% of the storage capacity in small and medium enterprises or large data centers is allocated but unused. This wasted storage capacity is where thin provisioning becomes useful. Copyright@2014 D-Link System, Inc. All Rights Reserved. 96

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D-Link Document – User Manual
3.
Change the virtual disk size. The size must be larger than the current, and then click the
OK
button to start extension.
4.
Extension starts. If the virtual disk needs initialization, it will display the status
Initiating
and
the complete percentage of initialization in
R%
.
TIP:
The extension size must be larger than the current size of the virtual disk.
CAUTION:
The extension cannot be executed during rebuilding or migration.
Thin Provisioning
Thin provisioning is a hot topic in the IT management and storage industry. When we think of thin
provisioning, it naturally brings to our minds the opposite term - fat provisioning, which is the
traditional way IT administrators allocate storage space. Each logical volume is used by an
application or a group of users. When it comes to the point to decide how much space a logical
volume requires for three years or for the lifetime of an application, it's really hard to make the
prediction correctly and precisely. To avoid the complexity of adding more space to the volumes
frequently, IT administrators end up allocating more storage space to each logical volume than it
needs in the beginning. This is why it's called "fat" provisioning. Usually it turns out that a lot of
free space is sitting around idle. This stranded capacity is wasted, which equals to waste of
investment and inefficiency. Various studies indicate that as much as 75% of the storage capacity
in small and medium enterprises or large data centers is allocated but unused. This wasted storage
capacity is where thin provisioning becomes useful.
96
Copyright@2014 D-Link System, Inc. All Rights Reserved.