Maximum Disk Shelves per Controller Configuration
When determining how many disk shelves a controller configuration supports, it is important to remember that each disk shelf chain can support up to six disk shelves, and some controller configurations are limited to a specific number of total disk shelves. The following table details the number of supported disk shelf chains per HBA type.
Table 12-6 Supported Disk Shelf Chains per HBA
| HBA Type | Number of Disk Shelf Chains per HBA |
|---|---|
|
SAS-3 4x4 port |
2 |
|
SAS-2 4x4 port |
2 |
|
SAS-2 2x4 port |
1 |
Controllers cannot simultaneously use 2x4 port SAS-2 HBAs and 4x4 port SAS-2 HBAs. As of software release OS8.7.0, 4x4 port SAS-3 HBAs and 4x4 port SAS-2 HBAs can be used together in the same system. Sun Disk Shelves are not supported in any system that includes a SAS-3 HBA, or a combination of SAS-3 and SAS-2 HBAs.
The following table shows the maximum number of HBAs per controller, and the maximum number of disk shelves supported per controller configuration. Both standalone and clustered controllers support the same maximum number of disk shelves.
Table 12-7 Maximum Disk Shelves per Controller Configuration
| Controller | Max. Shelves | Max. 2x4 Port SAS-2 HBA | Max. 4x4 Port SAS-2 HBA | Max. 4x4 Port SAS-3 HBA | Guidelines |
|---|---|---|---|---|---|
|
Oracle ZFS Storage ZS9-2 high-end model |
48 (1152 drives, including filler panels) |
NA |
NA |
4 |
Disk shelves can include 24x HDD/SSD, or combine 20x HDD/SSD plus 4x write-optimized and/or read-optimized flash accelerators (SSDs). Total number of chains is eight. Any combination of disk-only and write- or read-optimized shelves may be combined within the chain in any order. When employing Oracle Storage Drive Enclosure DE3-12C disk shelves, twoOracle Storage Drive Enclosure DE3-12C disk shelves are the equivalent of one Oracle Storage Drive Enclosure DEx-24 disk shelf. Thus, the maximum shelves is 96, which is still 1152 drives. The Oracle Storage Drive Enclosure DE3-12C disk shelf can include 12x HDD, or combine 10x HDD plus 2x write-optimized and/or read-optimized flash accelerators (SSDs). Total number of chains is still eight. When combining Oracle Storage Drive Enclosure DE3-12C and Oracle Storage Drive Enclosure DE3-24 disk shelves, the maximum allowed number of drives, including filler panels, is 1152 drives. |
|
Oracle ZFS Storage ZS9-2 mid-range model |
24 (576 drives, including filler panels) |
NA |
NA |
2 |
Disk shelves can include 24x HDD/SSD, or combine 20x HDD/SSD plus 4x write-optimized and/or read-optimized flash accelerators (SSDs). Total number of chains is four. Any combination of disk-only and write- or read-optimized shelves may be combined within the chain in any order. When employing Oracle Storage Drive Enclosure DE3-12C disk shelves, two Oracle Storage Drive Enclosure DE3-12C disk shelves are the equivalent of one Oracle Storage Drive Enclosure DEx-24 disk shelf. Thus, the maximum shelves is 48, which is still 576 drives. The Oracle Storage Drive Enclosure DE3-12C disk shelf can include 12x HDD, or combine 10x HDD plus 2x write-optimized and/or read-optimized flash accelerators (SSDs). Total number of chains is still four. When combining Oracle Storage Drive Enclosure DE3-12C and Oracle Storage Drive Enclosure DE3-24 disk shelves, the maximum allowed number of drives, including filler panels, is 576 drives. |
|
Oracle ZFS Storage ZS7-2 high-end model |
48 |
NA |
NA |
4 |
Disk shelves can include 24x HDD/SSD, or combine 20x HDD/SSD plus 4x write-optimized and/or read-optimized flash accelerators (SSDs). Total number of chains is eight. Any combination of disk-only and write- or read-optimized shelves may be combined within the chain in any order. |
|
Oracle ZFS Storage ZS7-2 mid-range model |
24 |
NA |
NA |
2 |
Disk shelves can include 24x HDD/SSD, or combine 20x HDD/SSD plus 4x write-optimized and/or read-optimized flash accelerators (SSDs). Total number of chains is four. Any combination of disk-only and write- or read-optimized shelves may be combined within the chain in any order. |
|
Oracle ZFS Storage ZS5-4 |
48 |
NA |
4 |
4 |
Disk shelves can include 24x HDD/SSD, or combine 20x HDD/SSD plus 4x write-optimized and/or read-optimized flash accelerators (SSDs). Total number of chains is eight. Any combination of disk-only and write- or read-optimized shelves may be combined within the chain in any order. |
|
Oracle ZFS Storage ZS5-2 |
16 |
NA |
2 |
2 |
Disk shelves can include 24x HDD/SSD, or combine 20x HDD/SSD plus 4x write-optimized and/or read-optimized flash accelerators (SSDs). Total number of chains is four. Any combination of disk-only and write- or read-optimized shelves may be combined within the chain in any order. |
|
Oracle ZFS Storage ZS4-4 |
36 |
NA |
4 |
4 |
Disk shelves can include 24x HDD/SSD, or combine 20x HDD/SSD plus 4x write-optimized and/or read-optimized flash accelerators (SSDs). Total number of chains is eight. Any combination of disk-only and write-optimized shelves can be combined within the chain in any order. |
|
Oracle ZFS Storage ZS3-4 |
36 |
NA |
4 |
NA |
Disk shelves can include 24x HDD, or combine 20x HDD plus 4x write-optimized flash accelerators (SSDs). Total number of chains is eight. Any combination of disk-only and write-optimized shelves can be combined within the chain in any order. You can also connect mixed disk shelf types (DE2 and legacy Sun Disk Shelves) to the same controllers, but each chain must contain only the same disk shelf type. Directly connecting different disk shelf types is not supported. |
|
Oracle ZFS Storage ZS3-2 |
16 |
NA |
2 |
2 |
Disk shelves can include 24x HDD, or combine 20x HDD plus 4x write-optimized flash accelerators (SSDs). Total number of chains is four. Any combination of disk-only and write-optimized shelves can be combined within the chain in any order. You can also connect mixed disk shelf types (DE2 and legacy Sun Disk Shelves) to the same controllers, but each chain must contain only the same disk shelf type. Directly connecting different disk shelf types is not supported. |
|
Sun ZFS Storage 7420 |
36 |
6 |
6 |
NA |
Disk shelves can include 24x HDD, or combine 20x HDD plus 4x write-optimized flash accelerators (SSDs). Total number of chains is six with 2X4 port SAS-2 HBAs, and 12 with 4X4 port SAS-2 HBAs. Any combination of disk-only and write-optimized shelves can be combined within the chain in any order. You can also connect mixed disk shelf types (DE2 and legacy Sun Disk Shelves) to the same controllers, but each chain must contain only the same disk shelf type. Directly connecting different disk shelf types is not supported. |
|
Sun ZFS Storage 7320 |
6 |
1 |
1 |
NA |
Any combination of disk-only and write-optimized shelves may be combined within the chain in any order. The cabling configurations are unchanged. You can also connect mixed disk shelf types (DE2 and legacy Sun Disk Shelves) to the same controllers, but each chain must contain only the same disk shelf type. Directly connecting different disk shelf types is not supported. |
|
Sun ZFS Storage 7120 |
2 |
1 |
NA |
NA |
Write-optimized SSDs are not supported in the expansion storage for the 7120. The disk shelves must be fully populated with 24 HDDs. You can also connect mixed disk shelf types (DE2 and legacy Sun Disk Shelves) to the same controllers. |