Western Digital My Cloud Volume_1 Not Mounted: How to Fix It

Medium 2-4 hours (excluding backup restore) Critical Severity Verified June 2026
Error Code
Volume_1 not mounted
Brand
Western Digital My Cloud
Product Type
nas
Severity
Critical
DIY Difficulty
Medium
Estimated Fix Time
2-4 hours (excluding backup restore)
The Western Digital My Cloud Volume_1 not mounted error means your NAS device cannot access its primary storage volume, typically due to hard drive failure or corruption. This is a critical error that can result in complete data loss if not addressed immediately.
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Tools You'll Need

How to Fix Error Code Volume_1 not mounted

  1. Power Down and Restart

    Always safely shut down the NAS through the dashboard before unplugging to prevent further data corruption.
  2. Check Drive Status in Dashboard

  3. Run File System Check

    Do not interrupt the disk test process as this could cause additional data loss.
  4. Attempt Volume Repair

    Volume repair may result in some data loss. Ensure you have recent backups before proceeding.
  5. Check Physical Drive Connection

    Opening the device will void your warranty. Handle internal components carefully to avoid static discharge damage.
  6. Replace Failed Hard Drive

    Replacing the drive will erase all data. This should only be done if you have backups or the original data is already lost.
  7. Restore from Backup

Parts You May Need

NAS-rated hard drive
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NAS-rated hard drive
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NAS-rated hard drive
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NAS-rated hard drive
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NAS-rated hard drive
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NAS-rated hard drive
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NAS-rated hard drive
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NAS-rated hard drive
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When to Call a Professional

Contact a data recovery specialist if you don't have backups and need to recover critical data from the failed drive. Professional services may be able to recover data even from severely damaged drives, though this can be expensive.

Frequently Asked Questions

Can I recover data from a My Cloud with Volume_1 not mounted error?
Data recovery depends on the type of failure. If it's a software issue, running disk repair may recover your data. For physical drive failures, professional data recovery services may be needed, though success isn't guaranteed.
What causes Volume_1 not mounted errors on WD My Cloud?
Common causes include hard drive failure, power surges, file system corruption, overheating, or physical damage to the drive. Age and heavy usage can also lead to drive degradation over time.
Will replacing the hard drive void my WD My Cloud warranty?
Yes, opening the enclosure and replacing internal components typically voids the manufacturer warranty. Check your warranty status before proceeding with internal repairs.
What type of hard drive should I use to replace a failed WD My Cloud drive?
Use a WD Red, Seagate IronWolf, or similar NAS-rated drive with the same or larger capacity. Avoid desktop drives as they're not designed for 24/7 operation in NAS devices.
How can I prevent Volume_1 not mounted errors in the future?
Maintain regular backups, ensure proper ventilation, use a UPS to protect against power surges, and monitor drive health through the dashboard. Replace drives proactively when they show signs of degradation.