Comment 5 for bug 1925722

Why do the disks on physical or virtual not have a serial number?

Looking at the physical logs, they certainly do have serial numbers.

2021-04-24T01:12:48-05:00 dell2 cloud-init[1606]: get_path_to_storage_volume for volume sda
2021-04-24T01:12:48-05:00 dell2 cloud-init[1606]: Processing serial 6842b2b01b006d0024858f55183677de via udev to 6842b2b01b006d0024858f55183677de
2021-04-24T01:12:48-05:00 dell2 cloud-init[1606]: lookup_disks found: ['wwn-0x6842b2b01b006d0024858f55183677de', 'scsi-36842b2b01b006d0024858f55183677de', 'wwn-0x6842b2b01b006d0024858f55183677de-part1', 'scsi-36842b2b01b006d0024858f55183677de-part1']
2021-04-24T01:12:48-05:00 dell2 cloud-init[1606]: lookup_disks realpath(wwn-0x6842b2b01b006d0024858f55183677de)=/dev/sda

Is it not included in your custom storage config? No serial numbers in the config.

> Here is the proposed change.
> https://pastebin.ubuntu.com/p/cvNd4Kbcky/

The risk here, especially with physical systems, is that the path (/dev/sda) is not reliable. That is, from boot to boot, the path to a specific disk may differ (sda may point to a different physical device).

MAAS certainly knows (physical system) or can construct (virtual) disks with serial numbers to ensure consistent and reliable deployments.

I would suggest this is not a bug, but rather configuration error (missing serial number in disk config).