Disk Shelf Configurations

The following tables describe device types supported for each disk shelf. For cabling information, see the Oracle ZFS Storage Appliance Cabling Guide, Release OS8.8.x.

Table 12-1 Oracle Storage Drive Enclosure DE3-24P/Oracle Storage Drive Enclosure DE2-24P Disk Shelf Configurations

Device Types	Data Slots	Cache/Log Slots	Notes/Examples
Data	0 - 23	none	Fully populated HDD data devices.
20 Data and 1-4 Log devices	0 - 19	20 - 23	Twenty HDD data devices and up to four log devices. Example slot configurations: Slot 20 (Log), Slot 21 (Log), Slot 22 (Log), Slot 23 (Log) Slot 20 (Log), Slot 21 (Log), Slot 22 (filler), Slot 23 (filler)
20 Data and 1-4 Cache or Meta devices	0 - 19	20 - 23	Software version OS8.6.0 or later is required for read cache devices. OS8.7.0 or later is required for meta devices, which must be a minimum of 3.2 TB each to support enhanced data deduplication. Up to four read cache or meta devices can be installed in consecutive slots. Two meta devices are recommended for four disk shelves. Example slot configuration: Slot 20 (Cache), Slot 21 (Cache), Slot 22 (filler), Slot 23 (filler)
20 Data and 1-4 Log, Cache, or Meta devices	0 - 19	20 - 23	Software version OS8.6.0 or later is required for read cache devices. OS8.7.0 or later is required for meta devices, which must be a minimum of 3.2 TB each to support enhanced data deduplication. Up to four read cache or meta devices can be installed in consecutive slots. Two meta devices are recommended for four disk shelves. Example slot configuration: Slot 20 (Cache), Slot 21 (Cache), Slot 22 (Log), Slot 23 (Log)

Table 12-2 Oracle Storage Drive Enclosure DE3-24P All-Flash Disk Shelf Configurations

Device Types	Data Slots	Cache/Log Slots	Notes/Examples
24 Data	0 - 23	none	Software version OS8.7.0 or later is required for all-flash pools.
20 Data and 1-4 Log devices	0 - 19	20 - 23	Twenty SSD data devices and up to four log devices installed in consecutive slots. Even with SSD data devices, log devices can boost performance by 15-20% for small block transactional workloads. Example slot configurations: Slot 20 (Log), Slot 21 (Log), Slot 22 (Log), Slot 23 (Log) Slot 20 (Log), Slot 21 (Log), Slot 22 (filler), Slot 23 (filler)

Table 12-3 Oracle Storage Drive Enclosure DE3-24C/Oracle Storage Drive Enclosure DE2-24C Disk Shelf Configurations

Device Types	Data Slots	Cache/Log Slots	Notes/Examples
Data	0 - 23	none	Fully populated HDD data devices.
20 Data and 1-4 Log devices	0 - 19	20 - 23	Twenty HDD data devices and up to four log devices installed in consecutive slots. Example slot configurations: Slot 20 (Log), Slot 21 (Log), Slot 22 (Log), Slot 23 (Log) Slot 20 (Log), Slot 21 (Log), Slot 22 (filler), Slot 23 (filler)
20 Data and 1-4 Cache or Meta devices	0 - 19	20 - 23	Software version OS8.6.0 or later is required for read cache devices. OS8.7.0 or later is required for meta devices, which must be a minimum of 3.2 TB each to support enhanced data deduplication. Up to four read cache or meta devices installed in consecutive slots. (Two meta devices recommended for four disk shelves.) Example slot configuration: Slot 20 (Cache), Slot 21 (Cache), Slot 22 (filler), Slot 23 (filler)
20 Data and 1-4 Log, Cache, or Meta devices	0 - 19	20 - 23	Software version OS8.6.0 or later is required for read cache devices. OS8.7.0 or later is required for meta devices, which must be a minimum of 3.2 TB each to support enhanced data deduplication. Twenty HDD data devices and up to four log, read cache, or meta devices installed in consecutive slots. (Two meta devices recommended for four disk shelves.) Example slot configuration: Slot 20 (Cache), Slot 21 (Cache), Slot 22 (Log), Slot 23 (Log)

Table 12-4 Oracle Storage Drive Enclosure DE3-12C Disk Shelf Configurations

Device Types	Data Slots	Cache/Log Slots	Notes/Examples
Data	0 - 11	none	Fully populated HDD data devices.
10 Data and 1-2 Log devices	0 - 9	10 - 11	Ten HDD data devices and up to two log devices. If no read cache/meta devices will be installed, then two log devices must be installed. Configurations do not include filler panels.
10 Data and 1-2 Cache or Meta devices	0 - 9	10 - 11	Ten HDD data devices and up to two read cache or meta devices. One log device and one read cache/meta device are allowed. Configurations do not include filler panels. Two meta devices are recommended for eight disk shelves. If using two DE3-12C disk shelves together, one meta device per disk shelf satisfies two meta devices for eight disk shelves. Example slot configurations: Slot 10 (Log), Slot 11 (Cache) Slot 10 (Cache), Slot 11 (Log) Slot 10 (Cache), Slot 11 (Cache)

Table 12-5 Sun Disk Shelf (DS2) Disk Shelf Configurations

Device Types	Data Slots	Cache/Log Slots	Notes/Examples
Data	0 - 23	none	Fully populated HDD data devices.
20 Data and 1-4 Log devices	0-23	20 - 23	20 HDD data devices and up to four SSD log devices installed in consecutive slots. Read cache devices and meta devices cannot be installed in the Sun Disk Shelf.