HP AP775A Cisco MDS 9500 Series Hardware Installation Guide (OL-17467-02, Octo - Page 74
Caching Services Module
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Services Modules Chapter 1 Product Overview Send documentation comments to [email protected]. Caching Services Module The Caching Services Module (CSM) provides virtualization services that allow the Cisco MDS 9000 Family switches to reallocate physical resources as virtual resources for increased efficiency. The CSM receives and sends data through the switch backplane. It has two disk drives, two internal batteries for backup in case of power failure, and no external ports. CSMs must be implemented in pairs in the fabric to provide redundancy and backup. Only two or more CSMs in a fabric are supported. However, the CSMs do not have to be installed in the same switch. The CSM may shut down because of the software, an external power failure, or the module separated from the backplane while it still had power. The CSM automatically backs up the data in memory to the disk drives and then shuts down. The CSM batteries provide adequate power to back up data without external power. Note The Cisco MDS 9513 does not support the CSM. Figure 1-33 shows the CSM. Figure 1-33 CSM 3 6 91626 DS-X9560-SMXX STATUS BATTERY Cashing Services Module 2 1 NODE 1 STATUS DISK 5 4 NODE 2 STATUS DISK 8 7 1 Status LED 2 Battery LED 3 Node 1 LEDs 4 Node 1 Status LED 5 Disk 1 Status LED 6 Node 2 LEDs 7 Node 2 Status LED 8 Disk 2 Status LED Figure 1-34 shows the location of the disk drives and batteries on the CSM. Caution The batteries are shipped fully charged and should be handled with caution accordingly. 1-52 Cisco MDS 9500 Series Hardware Installation Guide OL-17467-02