Drive Enclosure Strings
A string is a collection of Drive Enclosures that are connected by a common cable
to the same SAS HBA port on both Controller nodes. A string consists of one to
ve Drive Enclosures. Drive Enclosures are assigned to strings at the factory.
Important: Temporary labels aached to the shipping boxes identify the factory
conguration for the Drive Enclosure and the string assignment. Additionally,
the build map included with the shipment also identies the factory
conguration for the Drive Enclosures and the string assignments. Install and
cable the Drive Enclosures and strings according to the factory conguration.
Installation services from Oracle Customer Support is highly recommended.
An Oracle FS System with two SAS HBAs installed can have one or two strings
to support a maximum of 10 Drive Enclosures. A system with four SAS HBAs
can have up to four strings to support a maximum of 20 Drive Enclosures. A
performance system can have up to six strings to support a maximum of 30 Drive
Enclosures.
The SAS cables connect from the Controller SAS HBA ports to the rst Drive
Enclosure and the third Drive Enclosure in a string. For small systems with less
than three Drive Enclosures, the SAS cables connect from the Controller SAS
HBA ports to the rst Drive Enclosure and to the last Drive Enclosure in a string.
The following example shows the SAS cable connections for the rst string
congured in the system with ve Drive Enclosures.
Cabling Plan
120
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