Oracle disk shelves are high-availability serial attached SCSI (SAS) devices that
provide expanded storage. The main components are hot-swappable, including drives,
I/O Modules (IOMs) or SAS Interface Module (SIM) boards for connecting to
controllers and other disk shelves, and dual load-sharing power supply with fan
modules. This provides a fault-tolerant environment with no single point of failure.
Component status is indicated with lights on the disk shelf, and in the Maintenance:
Hardware screen of the BUI.
To understand disk shelf components and configurations, see the following topics.
• Oracle Storage Drive Enclosure DE3-24
• Oracle Storage Drive Enclosure DE2-24
• Sun Disk Shelf
• Disk Shelf Components
Oracle Storage Drive Enclosure DE3-24
This section introduces the front and rear panel components of the Oracle Storage
Drive Enclosure DE3-24P and DE3-24C disk shelves.
Oracle Storage Drive Enclosure DE3-24P Disk Shelf
Oracle Storage Drive Enclosure DE3-24P is a 2U chassis that supports 24 2.5'' SAS-3
drives. The high-performance HDDs provide reliable storage. The SSDs provide
accelerated write operations, and for some controllers, read-optimized cache
operations. This disk shelf features dual, redundant I/O Modules (IOMs), and dual
power supply with fan modules.
Oracle Storage Drive Enclosure DE3-24P Drive Locations (Front View)
Up to four write-optimized log SSDs are supported per disk shelf. Log devices should
be populated in order of slots 20, 21, 22, and 23.
Read-optimized cache SSDs can also be installed in the Oracle Storage Drive
Enclosure DE3-24P disk shelf, for some controllers. For slot configuration details and
minimum software requirements, see Disk Shelf Configurations in Oracle ZFS Storage
Appliance Customer Service Manual, Release OS8.8.x.
Oracle Storage Drive Enclosure DE3-24P Status Indicators (Front View)
Chapter 2
Overview of Disk Shelves
2-16
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