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Dynamic Root Disk

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Product details and specifications

Dynamic Root Disk (DRD) provides customers the ability to clone an HP-UX system image to an inactive disk, and then:

  • Perform system maintenance on the clone while their HP-UX 11i system is online
  • Quickly boot the clone disk during off-hours after the desired changes have been made and significantly reduces the system downtime
  • Utilize the clone for system recovery
  • Rehost the clone of an LVM-managed root on another system for testing or provisioning purposes
  • Perform an OE Update on the clone from an older version of HP-UX 11i v3 to HP-UX 11i v3 update 4 or later
  • Automatically synchronize the active image and the clone, eliminating the need to manually update files on the clone

DRD is available for download from this page and is supported on HP PA-RISC and Itanium®-based systems.

For more details about DRD, see the DRD website.

DRD is supported on systems including hard partitions (nPars), virtual partitions (vPars), and Integrity VMs running the following operating systems with roots managed by the following Volume Managers (except as specifically noted above for rehosting):

  • Operating System Releases
    • HP-UX 11i Version 2 (11.23) September 2004 or later
    • HP-UX 11i Version 3 (11.31)
  • Volume Managers
    • DRD A.3.5.* and earlier:
      • HP-UX 11i v2: LVM Volume Group Version 1.0
      • HP-UX 11i v3: LVM Volume Group Version 1.0
    • DRD A.3.6.* and later:
      • HP-UX 11i v2: LVM Volume Group Version 1.0
      • HP-UX 11i v3: LVM Volume Group Version 1.0 and LVM Volume Group Version 2.2
    • VxVM 4.1
    • VxVM 5.0
    • VxVM 5.0.1
    • VxVM 5.1 SP1
    • VxVM 6.1

Dynamic Root Disk (DRD) WARNING


DRD cloning of disks which have file systems managed by VxFS 6.1 fails with DRD version B.1131.A.3.15.45.

Starting from DRD version B.1131.A.3.15.45, DRD clone creation fails on systems running VxFS 6.1. VxFS 6.1 Patch-1 (PHKL_44519 or superseding patches) is required to support Veritas File System 6.1. In the absence of PHKL_44519 or superseding patches, creation of DRD clone would fail on VxFS 6.1 systems displaying the following mount errors:

ERROR:   Could not mount VxFS "/dev/drd00/lvol3" at "/var/opt/drd/mnts/sysimage_001/": Exec format error (errno = 8).


For systems having Base-VxFS-61 (VxFS 6.1) installed, ensure to install PHKL_44519 or superseding patches which are required for DRD version B.1131.A.3.15.45 and later.

Additional product information
Product #: DynRootDisk     
Additional info
Version: A.3.15.45
Software specification: HP-UX 11.31 - May 2017 (DynRootDisk_B.1131.A.3.15.45_HP-UX_B.11.31_IA_PA.depot)