Cisco UCS S3260 Manual page 6

Storage Server Features and Components Overview
Figure 4: Cisco UCS 3260 with the HDD expansion tray (Rear View)
If you have two server nodes with two SIOCs, you will have the following functionality:
1. The top server node works with the left SIOC (Server Slot1 with SIOC1).
2. The bottom server works with the right SIOC (Sever Slot 2 with SIOC2).
If you have one server node with two SIOCs, you can enable Server SIOC Connectivity functionality. Beginning
with release 3.1(3), Cisco UCS S3260 system supports Server SIOC Connectivity functionality. Using this
functionality, you can configure the data path through both the primary and auxiliary SIOCs when the chassis
has single server and dual SIOCs set up.
SAS Expanders
The Cisco UCS S3260 system has two SAS expanders that run in redundant mode and connect the disks at
the chassis level to storage controllers on the servers. The SAS expanders provide two paths between a storage
controller, and hence enable high availability. They provide the following functionality:
• Manage the pool of hard drives.
• Disk zone configuration of the hard drives to storage controllers on the servers.
The following table describes how the ports in each SAS expander are connected to the disks based on the
type of deployment.
Port range
1-56
57-60
Note
The number of SAS uplinks between storage controller and SAS expander can vary based on the type of
controller equipped in the server.
Storage Enclosures
A Cisco UCS S3260 system has the following types of storage enclosures:
Cisco UCS S3260 System Storage Management
6
Cisco UCS S3260 System Storage Management
Connectivity
Top accessible disks
Disks in the HDD expansion tray.