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Tier optimization would run for at most n seconds on each volume.

Run the operation at normal priority (default is low). Optimize the storage tiers on the specified volumes. Perform the operation on all volumes except those specified. On a tiered volume though, traditional defrag is performed only on the Capacity tier. Perform traditional defrag (this is the default). Perform analysis on the specified volumes.

Specifies the drive letter or mount point path of the volume to be defragmented or analyzed. Syntax defrag | /c | /e | ]ĭefrag | /c | /e /a | ]ĭefrag | /c | /e /x | ] Membership in the local Administrators group, or equivalent, is the minimum required to run this command. Locates and consolidates fragmented files on local volumes to improve system performance. If the Security Options button is not available, Disk Utility cannot perform a secure erase on the storage device.Applies to: Windows Server 2022, Windows Server 2019, Windows 10, Windows Server 2016, Windows Server 2012 R2, Windows Server 2012 Secure erase options are available only for some types of storage devices. (Optional) If available, click Security Options, use the slider to choose how many times to write over the erased data, then click OK. If the Scheme pop-up menu isn’t available, make sure you selected the storage device you want to erase-it’s at the top of the hierarchy.Ĭlick the Format pop-up menu, then choose a file system format. Ĭlick the Scheme pop-up menu, then choose GUID Partition Map.

In the sidebar, select the storage device you want to erase, then click the Erase button. If you want to erase any other type of storage device: Double-click Disk Utility in the /Applications/Utilities folder. Note: If you want to get your Mac ready to trade in, sell, or give away, and your computer is a Mac with Apple silicon or an Intel-based Mac with an Apple T2 Security Chip, use Erase Assistant.