*object.HostSystem().Properties not retrieving all durableName data on scsilun...it should be?

[flamingdumpster]

I am executing code to get scsiLun durable name information and what I see come back in each durableName is the least significant byte of the array of data that is in the database found in this file: vmware-vimdump_-o----U-dcui.txt.FRAG-00000 from the vm-support command.

We are expecting the type.SCSILunDurableName.Data field to have all bytes that appear in the database as retrieved from the inquiry pages, but it only has the least significant byte (first digit,) and we are not sure why. Here is the code that is executed:

    hosts, err := finder.HostSystemList(ctx, "*")
	if err != nil {
		return nil, err
	}

	var targetHost *object.HostSystem
	for _, h := range hosts {

		if h.Name() == hostname {
			targetHost = h
			break
		}
	}
	
	var populatedHost mo.HostSystem
	hostSystemErr := targetHost.Properties(ctx, targetHost.Reference(), nil, &populatedHost)

	if hostSystemErr != nil {
		log.Debugf("Host System Query bombed: %s", hostSystemErr.Error())
		return lunNames, hostSystemErr
	}

	hostLuns := populatedHost.Config.StorageDevice.ScsiLun

	for _, lun := range hostLuns {

		log.Debugf("** Lun: %s **", lun.GetScsiLun().CanonicalName)

		altNames := lun.GetScsiLun().AlternateName

		for _, alt := range altNames {
			log.Debugf("NS: %s, ID: %x Data: %x", alt.Namespace, alt.NamespaceId, alt.Data)
		}
	}
	

The kind of output we are seeing is as follows:

time="2024-06-11T18:30:50Z" level=debug msg="** Lun: <redacted> **"
time="2024-06-11T18:30:50Z" level=debug msg="NS: GENERIC_VPD, ID: 5 Data: 2d3438"
time="2024-06-11T18:30:50Z" level=debug msg="NS: SERIALNUM, ID: 4 Data: 30"
time="2024-06-11T18:30:50Z" level=debug msg="NS: NAA, ID: 3 Data: 30"
time="2024-06-11T18:30:50Z" level=debug msg="NS: UNKNOWN, ID: 5 Data: 34"
time="2024-06-11T18:30:50Z" level=debug msg="NS: UNKNOWN, ID: 5 Data: 31"
time="2024-06-11T18:30:50Z" level=debug msg="NS: GENERIC_VPD, ID: 5 Data: 30"
time="2024-06-11T18:30:50Z" level=debug msg="NS: GENERIC_VPD, ID: 5 Data: 30"
time="2024-06-11T18:30:50Z" level=debug msg="NS: GENERIC_VPD, ID: 5 Data: 313235"
time="2024-06-11T18:30:50Z" level=debug msg="NS: GENERIC_VPD, ID: 5 Data: 313235"
time="2024-06-11T18:30:50Z" level=debug msg="NS: GENERIC_VPD, ID: 5 Data: 30"
time="2024-06-11T18:30:50Z" level=debug msg="NS: GENERIC_VPD, ID: 5 Data: 313039"
time="2024-06-11T18:30:50Z" level=debug msg="NS: GENERIC_VPD, ID: 5 Data: 313033"
time="2024-06-11T18:30:50Z" level=debug msg="NS: GENERIC_VPD, ID: 5 Data: 30"
time="2024-06-11T18:30:50Z" level=debug msg="NS: GENERIC_VPD, ID: 5 Data: 313235"
time="2024-06-11T18:30:50Z" level=debug msg="NS: GENERIC_VPD, ID: 5 Data: 313235"
time="2024-06-11T18:30:50Z" level=debug msg="NS: GENERIC_VPD, ID: 5 Data: 30"

"Data", in each instance, only carries the least significant byte of the json array found in the database. The question is why? How do I get all of the data if I am not doing it correctly here? Since "ps" is nil in the call to targetHost.Properties(), it should return all of the data, and certainly not just one byte of data from an array that clearly has more for each durableName.

Can anyone shed light on this for me? Thanks.

[dougm]

Resolved in #3469