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Requirements when replacing disks in a vSAN cluster
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Article ID: 327048
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Updated On:
Products
VMware vSAN
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Issue/Introduction
To provide guidance regarding disk replacement in vSAN environments.
Impact/Risks:
Failure to follow requirements may result in undesired operation with outcomes ranging from poor performance up to and including data loss.
Symptoms:
One or more disks have failed in a vSAN cluster, requiring replacement.
Environment
VMware vSAN
Resolution
Before to replace a failed disk in a vSAN cluster, please ensure that the following requirements apply:
Disk must be certified for use with vSAN per the
vSAN Compatibility Guide
Cache disk replacements must be certified for cache use
Disk must be certified for vSAN configuration in use (hybrid/all-flash)
Disk capacity should ideally be the same as the one being replaced.
If the same size is not available, the next size up is acceptable
Disk performance and endurance classes must be the same or higher when compared to the original disk
See
Identifying specific disk failure in a vSAN deduplication cluster
for more information
See
How to manually remove and recreate a vSAN disk group using esxcli
for more information
When replacing a failed capacity tier disk without Deduplication and Compression make sure to remove the failed disk from the disk group prior to pulling the disk from the host. See
Replace a Capacity Device
for more details.
When replacing a failed cache tier disk or a capacity tier disk with Deduplication and Compression the entire disk group needs to be removed from vSAN prior to replacing the failed disk. See
Replace a Flash Caching Device on a Host
&
Adding or Removing Disks with Deduplication and Compression
for more details.
Additional Information
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