Hello,   Page 269 of the admin guide for DSM details the disk replacement process.   [URL]   1. If the Storage Manager Client is connected to a Data Collector, select a Storage Center from the Storage view.2. Click the Hardware tab.3. In the Hardware tab navigation pane, expand the enclosure and select Disks.4. In the right pane, click the Disks subtab, then select the failed disk and click Replace Disk.5. Locate the failed disk and click Next.6. Follow the instructions to physically remove the failed disk from the enclosure. Click Next.7. Insert the new disk into the enclosure, following all instructions. Click Next.8. If the disk replacement succeeds, Storage Center confirms this. It also displays information about the new disk.9. Click Finish to close the wizard.   As for your concerns about marking the drive as offline, the manual would call this process "releasing a disk." The process is detailed on page 264.   1. If the Storage Manager Client is connected to a Data Collector, select a Storage Center from the Storage view.2. Click the Hardware tab.3. In the Hardware tab navigation pane, expand the enclosure and select Disks.The Disks view is displayed.4. In the right pane, click the Disks subtab, then select a disk and click Release Disk.The Release Disks dialog box opens.5. Schedule a RAID rebalance.• To start a RAID rebalance after releasing the disk, select Perform RAID rebalance immediately.• To schedule a RAID rebalance, select Schedule RAID rebalance then select a date and time.6. To skip the RAID rebalance, select I will start RAID rebalance later.7. Click OK.
we has a SC4020, I want manual replace a nomal hard disk, How can I do? 1 on dsm click "replace disk"? the guide tell me before replace disk,must down disk, but I donot know how to down disk. 2 first "Release a Disk",and then "Delete a Disk"?  
SC4020 I want manual replace a nomal hard disk, How can I do?