Adaptec 5325301507 - Snap Server 4400 NAS, Administrator'S Manual

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Expansion Arrays
64 SnapServer Administrator Guide
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.