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  1. RHEL Documentation
  2. RHELDOCS-21467

[Virtualization Storage] Document S3-PR (SCSI3-Persistent Reservation) support from rhel-9.4.z

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    • rhel-sst-ccs
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    • CCS 2025-24, CCS 2025-25, CCS 2026-1
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      .SCSI3 Persistent Reservation support for virtual machines

      With this update, RHEL supports SCSI3 Persistent Reservation (S3-PR) for virtual machines (VMs). This feature makes it possible for multiple VMs to coordinate access to shared storage devices, which is essential for Linux clustering solutions, such as Pacemaker, and for Windows Server Failover Clustering.

      As a result, VMs can register and manage persistent reservations on storage devices, which prevent conflicts when multiple VMs access the same storage. S3-PR support is available for both single-path and multipathed vDisks.

      Note that for S3-PR to work, the host must use a supported RHEL and kernel version. For details, see: link:https://access.redhat.com/solutions/7133882[Required RHEL versions for SGIO support in Virtual Machines]
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      .SCSI3 Persistent Reservation support for virtual machines With this update, RHEL supports SCSI3 Persistent Reservation (S3-PR) for virtual machines (VMs). This feature makes it possible for multiple VMs to coordinate access to shared storage devices, which is essential for Linux clustering solutions, such as Pacemaker, and for Windows Server Failover Clustering. As a result, VMs can register and manage persistent reservations on storage devices, which prevent conflicts when multiple VMs access the same storage. S3-PR support is available for both single-path and multipathed vDisks. Note that for S3-PR to work, the host must use a supported RHEL and kernel version. For details, see: link: https://access.redhat.com/solutions/7133882 [Required RHEL versions for SGIO support in Virtual Machines]
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      Document link:

      Section number and name:

      Describe the issue:

      We've decided to support S3-PR, with or without multipath on the host from rhel-9.4.z onwards in RHEL. Older versions will remain unsupported and require a support exception for any needs.

      restrictions:

      live migration does not support

      Impact of this issue:

      Suggestions for improvement:

              rhn-support-davozeni Daniel Vozenilek
              coli@redhat.com Cong Li
              Meina Li, qing wang
              RHEL Docs RHEL Docs
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                Created:
                Updated: