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Status Not under consideration
Categories Flashcopy Manager
Created by Guest
Created on Jun 12, 2020

Manually provide Product and LUN-Identifiers for sd*-disks

Spectrum Protect Snapshot (SPS) identifies the available disks by issuing a series of low-level Linux commands which deliver the LUN-ID and Product-ID of these devices. Among others:
- dmsetup
- searching /sys/block/sd*/dev
- Requesting SCSI pages 0x80 and 0x83

In certain virtualized environments it is not possible for an hypervisor to pass the disks through to a VM in a way that these low-level information can be made visible from inside it. In such cases,
- disks would be just /dev/sd*-devices
- multipath -l would not return any information
- SCSI page 0x83 will look like "0QEMU_QEMU_HARDDISK_drive-ua-97b39692-c104-4e04-a9f9-45b86ded07bc"

I request the possibility to manually deliver the physical Product- and LUN-IDs by defining a mapping table against f.e the virtualized device-id (page 0x83) of local /dev/sd*-disks. This could look like:
0QEMU_QEMU_HARDDISK_drive-ua-97b39692-c104-4e04-a9f9-45b86ded07bc:IBM ,2145:360050768018085b738000000000166c3

Idea priority High
  • Guest
    Jul 7, 2020

    IBM has analyzed this RFE and has identified that the underlying problem here is a RedHat Bug: 1482191
    IBM recommends working with Red Hat support to have them fix this bug.