A Adding Or Removing An Expansion Enclosure; Adding Multiple Expansion Enclosures To A Storage System Deployed Without Expansion Enclosures - Dell SC4020 Deployment Manual

Adding or Removing an Expansion
Enclosure
This section describes how to add an expansion enclosure to a storage system and how to remove an
expansion enclosure from a storage system.
Adding Multiple Expansion Enclosures to a Storage
System Deployed without Expansion Enclosures
Use caution when adding expansion enclosures to a live Storage Center system to preserve the integrity
of the existing data.
Prerequisites
Install the expansion enclosures in a rack, but do not connect the expansion enclosures to the storage
system.
About this task
Make sure that your data is backed up before adding expansion enclosures to an existing chain. For
maximum data protection, add expansion enclosures during a planned maintenance window.
NOTE: When adding an expansion enclosure to a Storage Center with an existing expansion
enclosure, add the new expansion enclosure to the end of the SAS chain.
Steps
1. Cable the expansion enclosures together to form a chain.
2. Use the Dell Storage Manager Client to connect to the Storage Center.
3. Check the disk count of the Storage Center system before adding the expansion enclosures.
4. Turn on the expansion enclosures. When the drives spin up, make sure that the front panel and
power status LEDs show normal operation.
5. Add the expansion enclosures to the A-side chain.
6. Add the expansion enclosures to the B-side chain.
7. To manually manage new unassigned disks:
a. Click the Storage tab.
b. In the Storage tab navigation pane, select the Disks node.
c. Click Manage Unassigned Disks. The Manage Unassigned Disks dialog box opens.
d. From the Disk Folder drop-down menu, select the disk folder for the unassigned disks.
e. To change which disks will be assigned to the disk folder, click Change.
f. To schedule a RAID rebalance select one of the following options.
• To start a RAID rebalance after creating the disk folder, select Perform RAID rebalance
immediately.
• To schedule a RAID rebalance for a later time, select Schedule RAID rebalance then select a
date and time.
g. Click OK.
8. Label the new back-end cables.
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