If replacing an existing hard drive, remove the hard drive that you want to replace.
Important To ensure adequate system cooling, do not operate the server for more than 2 minutes without either a hard disk drive or a filler panel installed in each bay.
Important Always use an electrostatic-discharge wrist strap or other grounding system when you work inside the server. For more information, see Protecting against ESD damage.

| 1 | Drive-tray assembly |
| 2 | Drive handle |
| 3 | Filler panel |

| 1 | Latch |
| 2 | Handle |
| 3 | Filler panel handle |
After you replace a failed hard disk drive, the green activity LED flashes as the disk is accessed. When the new drive starts to rebuild, the amber LED flashes slowly, and the green activity LED remains lit during the rebuild process. The rebuild process takes approximately 30 minutes. An amber LED that remains lit indicates a faulty drive that you must replace.