About Replacing a Hard-disk Drive
The procedure for replacing a hard-disk drive (HDD) differs depending on the various appliance hardware models.
On the models that allow you to perform a hot-swap replacement, you can replace a hard-disk drive (HDD) without powering done the appliance before. This applies, for example, to the model F appliances.
For more information, see Replace a Hard-Disk Drive on a Model F Appliance.