APAR status
Closed as documentation error.
Error description
The upgrade of IBM Db2 Analytics Accelerator on Z may fail with messages such as "sfdisk: /dev/dasda: does not contain a recognized partition table" found in the Hardware Management Console (HMC) Operating System Messages view. The issue occurs when using thin-provisioned volumes: the initialization of the root volume will fail, so the accelerator software stack cannot be installed. The issue was introduced by incorporating the latest version of the Secure Service Container (SSC) in maintenance level 7.5.6. This SSC version contains a new version of a tool to format disks: - Before 7.5.6, this tool always performed a full formatting of the disk so that the complete size of the disk was allocated, even if the disks used were initially defined as 'thin- provisioned' (also known as Extent Space Efficient - ESE) by the storage system. - The new version of the tool as used in 7.5.6 changed the default formatting settings to support thin-provisioned disks but omitted additional commands so that the disks can afterwards be accessed by the accelerator. Subsequently the installation procedures fail. Additional keywords: TS006165977 TS006197277 TS006120514 SSC THIN-PROVISIONED VOLUME GH...everest/customer-cases/issues/220
Local fix
To avoid the upgrade failure, only use fully-provisioned storage volumes for installation of maintenance level 7.5.6 and subsequent use of the accelerator. This applies to all kind of devices (data, boot, and runtime). Until the issue will have been fixed by IBM, Extent Space Efficient (ESE) devices must not be used with Accelerator on Z. Instead, ESE or thin provisioning must be deactivated by the Storage Administrator for all disks to be used with the accelerator.
Problem summary
Problem summary: The upgrade of IBM Db2 Analytics Accelerator 7.5 on Z to maintenance level 7.5.6 will fail if the boot disk used is a thin-provisioned (ESE) volume. Maintenance level 7.5.6 only supports fully-provisioned volumes (not ESE volumes) for the boot disk, the data pool, and the runtime pool. Users affected: Customers of IBM Db2 Analytics Accelerator 7.5 on Z trying to use ESE / thin-provisioned volumes when upgrading to maintenance level 7.5.6.
Problem conclusion
The issue has been fixed with maintenance level 7.5.7. The fix introduces kind of toleration of thin-provisioned volumes by formatting them completely. This applies to volumes used for the boot disk, the data pool, and the runtime pool. Upgrade your accelerator maintenance level to 7.5.7 or higher.
Temporary fix
Comments
APAR Information
APAR number
PH39057
Reported component name
ANYTCS ACCLTR Z
Reported component ID
5697DA700
Reported release
750
Status
CLOSED DOC
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2021-07-16
Closed date
2021-11-26
Last modified date
2021-11-26
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Applicable component levels
[{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SG19M"},"Platform":[{"code":"PF054","label":"z\/OS"}],"Version":"750"}]
Document Information
Modified date:
27 November 2021