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Balance the number of disk chains across the number of HBAs in your system. For
example, attaching two chains to two separate HBAs will have better performance than
attaching two chains to a single HBA.
•
Do not mix disks with different capacities or rotation speeds within a single disk shelf.
•
To maximize performance, use the maximum number of disk chains supported by the
controller's SAS HBAs. For example, four SAS HBAs with eight chains and eight disk
shelves will have better performance than two SAS HBAs with four chains and eight disk
shelves.
•
To maximize performance, do not attach more than four Oracle Storage Drive Enclosure
DE2-24C, DE2-24P, or DE3-24C disk shelves to a single chain, and do not attach more
than three Oracle Storage Drive Enclosure DE3-24P disk shelves to a single chain. This
only applies to systems that are performance critical. The maximum of six disk shelves
per chain is available for cases where capacity is preferred over performance.
Cable Lengths
•
Active optical cables (AOCs) are required for attaching Oracle ZFS Storage ZS9-2 and
ZS7-2 controllers to Oracle Storage Drive Enclosure DE3-24 disk shelves. Other
controllers and/or disk shelves in the future may use AOC cabling. AOCs are available in
the following lengths: 3 meters, 6 meters, and 20 meters. The maximum AOC length
between a controller and disk shelves that span further than two adjacent cabinets is 20
meters.
•
Oracle Storage Drive Enclosure DE2-24 disk shelves with specific drive types (see
Cabling Mixed Oracle Storage Drive Enclosure DE3-24 and DE2-24 Disk Shelves to
Oracle ZFS Storage ZS9-2 High-end (HE) Controllers
Cabling Guide, Release OS8.8.x are supported by Oracle ZFS Storage ZS9-2 controllers
and require SAS copper cabling connections. Oracle Storage Drive Enclosure DE2-24
disk shelf connection to Oracle ZFS Storage ZS7-2 controllers is supported in software
release OS8.8.4 and later. Available copper cable lengths between the Oracle ZFS
Storage ZS9-2 controller or the ZS7-2 controller and the Oracle Storage Drive Enclosure
DE2-24 disk shelf are 3 meters and 6 meters.
•
The maximum copper cable length between a controller and disk shelves is 6 meters.
•
The maximum copper or AOC cable length between Oracle Storage Drive Enclosure
DE3-24 disk shelves in a single chain that spans two adjacent cabinets is 6 meters
copper, 6 meters AOC, or 20 meters AOC; only one pair of 6-meter cables is allowed per
chain.
•
The maximum copper cable length between Oracle Storage Drive Enclosure DE2-24 disk
shelves that span across adjacent cabinets is 3 meters.
•
The maximum copper cable length between Sun Disk Shelves that span across adjacent
cabinets is 3 meters.
Cable Bend Radius
Do not bend SAS cables less than the following minimum radius:
SAS Cable Type
Copper
Copper
SAS Cable Length
1 meter
3 meters
Cabinet Configuration Guidelines
in Oracle ZFS Storage Appliance
Minimum Bend Radius
26 mm
28 mm
Chapter 2
2-5
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