User's Manual

Connectors 171
9
Connectors
A controller contains one or more connectors (channels or ports) to which
you can attach disks. A connector is externally accessible for attaching an
enclosure (with external disks) to the system. A connector may also be
attached to the system’s backplane (for internal disks). The controller’s
connectors are displayed by expanding the controller object in the tree view.
NOTE: For PCIe SSD, connectors are referred to as PCIe SSD extenders.
Channel Redundancy and Thermal Shutdown
It is possible to create a virtual disk that uses physical disks that are attached
to different controller channels. The physical disks may reside in an external
enclosure or the backplane (internal enclosure). If the virtual disk is
maintaining redundant data on different channels, then the virtual disk is
channel redundant. Channel redundancy means that if one of the channels
fails, data is not lost because redundant data resides on another channel.
Channel redundancy might also be used for disks that reside in enclosures
subject to thermal shutdown. Should the enclosure attached to one of the
channels turn off, redundant data is maintained on the other channel.
Channel redundancy is implemented by selecting physical disks on different
channels when using the Create Virtual Disk Advanced Wizard.
NOTE: Channel redundancy only applies to controllers that have more than one
channel and that attach to an external disk enclosure.
Related Information:
• SMART Thermal Shutdown
• Channel Redundancy on PERC 4/DC, 4e/DC, 4/Di, and 4e/Di Controllers
• Creating a Channel-redundant Virtual Disk