Lenovo S3200 Quick Start Manual page 5

Lenovo Storage S3200 with Fibre Channel
Single Copy on Write (SCW) Snapshots
The Lenovo Storage S3200 uses a snapshot technology called single copy on write
(SCW) with Original/Write Data Preservation capabilities. This technology reduces the
size of snapshots by preserving the data captured in a snapshot in place and then
writing to a new snapshot volume for all writes going forward. This significantly improves
speed of writes compared to methods such as copy on first write (COFW).
These snapshots allow rollbacks in the case of administrator error or a malicious user
overwriting information. Ransomware can be removed completely without a headache or
dealing with a criminal. It can also be very useful in a development environment to
create a point in time to roll back to after performing some actions to test a new
configuration and then to roll back in minutes to an old configuration.
We validated snapshots on the Lenovo Storage S3200 as part of this project.
Virtualized Storage Pools
Virtualized storage pools allow for flexible creation of storage volumes by writing
sections of data to different media types. When combined with Intelligent Real-time
Tiering, this allows data to be written to faster media when it is being accessed often and
to be stored on slower media when it is being accessed less frequently. In addition to
enabling performance gains, the virtualized storage pools simplify the management of
storage volumes. More storage can be added to the volumes via these storage pools
without requiring a full rebuild of a volume which saves time, money, and ensures data
integrity.
We used storage pools during this validation.
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