Adding An Sc280 Expansion Enclosure To An Sc4020 Deployed With One Sc280 Expansion Enclosure; Check The Disk Count Before Adding An Expansion Enclosure - Dell SC4020 Deployment Manual

Adding an SC280 Expansion Enclosure to an SC4020
Deployed with One SC280 Expansion Enclosure
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 enclosures to the storage
system.
About this task
Make sure that your data is backed up before adding an expansion enclosure to an existing chain. For
maximum data protection, add an expansion enclosure 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. 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.
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Adding or Removing an Expansion Enclosure