Oracle ZFS Installation Manual page 26

Overview of Disk Shelves
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.
FIGURE 1
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 DE3-24P disk shelf, for some
controllers. For slot configuration details and minimum software requirements, see
Configurations" in Oracle ZFS Storage Appliance Customer Service
26 Oracle ZFS Storage Appliance Installation Guide, Release OS8.8.x • August 2021
DE3-24P Drive Locations (Front View)
"Disk Shelf
Manual.