Ubuntu
sg3-utils package

  1. Disco (19.04)
  2. Bug #1833618
  3. Comment #33

Comment 33 for bug 1833618

Revision history for this message
Ryan Harper (raharper) wrote : Re: failing to deploy Ubuntu Disco

@Rafael,

the critical path would be to check the output from:

udevadm info --query=all --name=/dev/sd[cd] | grep -i serial

ID_SERIAL does not get set on Disco where we have sg3-utils package install, which adds the s3g-utils-udev package, and includes the rules file 55-scsi-sg3_id.rules.

This udev rule uses sg_inq --export /path/to/device to query for device properties.

I suspect you can reproduce the failure on the device by running

sg_inq --export on the usb block device.

Note that in 55-scsi-sg3 rules, if no ID_SERIAL is found via the previous import, then the rules construct an ID_SERIAL from various scsi id values;

This is the core issue since normally 60-persistent-storage.rules would use 'ata_id', 'usb_id' and 'scsi_id' to extract the ID_SERIAL value, but since 55 rules run before 60, the sg3-utils-udev package sets ID_SERIAL, and prevents the 60-persistent-storage.rules from setting the value to match.