I'm setting up a Windows Server 2019 failover cluster, and I've seen advice to put the cluster quorum on its own LUN. How much disk space should I dedicate to it? It does not appear to take much space on my test cluster. This cluster will be used for MS SQL, if it makes a difference.

Similar question for Server 2008 : Quorum Disk size for Windows 2008R2 failover

  • Most of the clusters I've seen used a quorum disk of 5 to 20 GB.
    – joeqwerty
    Apr 18 '19 at 1:12

1GB wil be more than enough. Quorum disk stores only cluster configuration

  • I've gone the route of assigning a larger but thin-provisioned disk, and indeed, it hasn't grown from day 1. Jun 6 '19 at 15:01

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