Adaptec 5325301507 Administration Guide - Page 80

Expansion Arrays Snap Expansion S50 The Snap Expansion S50 storage subsystem is a 2U expansion array with up to twelve SAS or SATA II disk drives, or a combination of SAS and SATA disk drives up to a maximum of 12. It ships as a set of unassigned disks with no RAID configuration. Up to seven Snap Expansion S50s can be connected to a SnapServer 520, 550, 620, 650, or 18000. Up to three Snap Expansion S50s can be connected to a SnapServer 4500. Note Specific configurations are recommended when SAS and SATA drives (or drives of different rotational speeds) are combined in the same expansion array. Be sure to review "Adding New Disk Drives to Increase Capacity" on page 68 before configuring a mixed-drive array. A Snap Expansion S50 expansion array is accessed and managed through the SnapServer to which it is connected. The expansion array has no physical connection to the network. After the S50 is installed and powered on (see the Quick Start Guide for details), the array's disk drives appear as unassigned drives, allowing the administrator to configure RAIDs as necessary. Preparing the SnapServer Some SnapServers ship with an HBA installed for connectivity to one or more expansion arrays. If your server already has an expansion HBA, no further preparation (other than preparing rack space) is necessary. To connect an expansion array to a SnapServer that does not have an expansion HBA, you will need to purchase and install the HBA, available from an authorized SnapServer reseller. Note If you plan to add an expansion HBA to a SnapServer 4500, make sure there is an available PCI slot. 64 SnapServer Administrator Guide