Adding An Sc280 Expansion Enclosure To An Sc4020 Deployed Without Expansion Enclosures; Check The Disk Count Before Adding An Expansion Enclosure - Dell SC4020 Deployment Manual

5. New expansion enclosure (2)
Adding an SC280 Expansion Enclosure to an SC4020
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 enclosure in a rack and, but do not connect the expansion enclosure to the storage
system.
About this task
Make sure that your data is backed up before adding the expansion enclosure. For maximum data
protection, add an expansion enclosure during a planned maintenance window.
Steps
1. Use the Dell Storage Manager Client to connect to the Storage Center.
2. Check the disk count of the Storage Center system before adding the expansion enclosures.
3. Turn on the expansion enclosure. When the drives spin up, make sure that the front panel and power
status LEDs show normal operation.
4. Add the expansion enclosure to the A-side chain.
5. Add the expansion enclosure to the B-side chain.
6. 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.
7. Label the new back-end cables.

Check the Disk Count before Adding an Expansion Enclosure

Use the Dell Storage Manager Client to determine the number of drives that are currently accessible to
the Storage Center.
1. Connect to the Storage Center using the Dell Storage Manager Client.
2. Select the Storage tab.
3. In the Storage tab navigation pane, select the Disks node.
4. On the Disks tab, record the number of drives that are accessible by the Storage Center.
Compare this value to the number of drives accessible by the Storage Center after adding an
expansion enclosure to the storage system.
Adding or Removing an Expansion Enclosure
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