Windows & BSOD · critical

How to fixSTORAGE-SPACES-DEGRADED

Windows Storage Spaces pool degraded

What this error means

Windows Storage Spaces pool degraded (STORAGE-SPACES-DEGRADED) is a critical-severity fault affecting the Windows operating system. A Storage Spaces pool is in a degraded state because one or more member drives failed or disconnected. The usual suspects are SATA/USB connection lost and disk firmware bug causing disconnection. Follow the steps below to fix it.

Before you begin

Save open work and back up important files. Note any recent driver or hardware changes. If Windows cannot start, use the startup guide first.

Work through these checks

0 of 3 complete
01Open Storage Spaces in Control Panel and check drive status

Open Storage Spaces in Control Panel and check drive status.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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02Repair the pool: Repair-VirtualDisk -FriendlyName 'YourVirtualDisk'

Repair the pool: Repair-VirtualDisk -FriendlyName 'YourVirtualDisk'.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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03Replace the failed drive and re-add to the pool

Replace the failed drive and re-add to the pool.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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Possible causes

  • Physical drive failure in the pool
  • SATA/USB connection lost
  • Disk firmware bug causing disconnection