Chapter 3 - Understanding Spectra Advanced Bucket Management Concepts
Special Considerations for Ejecting Tapes
Disk Partitions
Disk partitions are comprised of storage pools on external SAS expansion nodes. There are
two types of disk partitions.
Online
disk partitions are created on Spectra 44-bay expansion
nodes, while
Nearline
disk partitions are created on Spectra 96-bay expansion nodes. 107-
bay expansion nodes provide either
Online
or
Nearline
storage, depending on the type of
drives installed.
•
Online
—Online storage using 44-bay expansion nodes is used as a temporary, high-
performance storage target for highly transactional data.
•
Nearline
—Nearline storage using 96-bay expansion nodes is a cost effective storage
target for deep storage. Nearline storage is not recommended for frequent reads or
writes.
Nearline storage pools on the 96-bay expansion node are automatically created by the
BlackPearl system when the system detects a sufficient number of disks for a new storage
pool, and there is a capacity key installed on the system to license the additional storage
space. Online storage pools are manually created using the BlackPearl user interface after
you attach a 44-bay expansion node, or a 107-bay expansion node with SAS drives (see
Create an Online Disk Pool on page 105
).
Once storage pools are created, you must manually add them to disk partitions. For
information on creating a disk partition, see
Create a Disk Partition on page 107
.
S
PECIAL
C
ONSIDERATIONS FOR
E
JECTING
T
APES
If you plan to eject tapes, Spectra Logic recommends the following storage domain and data
policy settings:
• Set the Write Optimization setting to
Capacity
when configuring a storage domain so that
data is written to as few tapes as possible.
• Enable
Bucket Isolation
when configuring a data policy. This setting configures the
bucket to have its own unique set of tapes. This ensures that tape media containing one
bucket of information is not mixed with another bucket, making it easier to eject a
bucket.
November 2020
User Guide-BlackPearl Converged Storage System
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