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https://bugs.launchpad.net/bugs/1815064
Title:
udev 237 incorrectly reporting serials for scsi devices
Status in udev package in Ubuntu:
Confirmed
Bug description:
system info:
Kernel: Ubuntu 4.15.0-29.31-generic 4.15.18
Package: udev 237-3ubuntu10.3
Description: Ubuntu 18.04.1 LTS
Release: 18.04
We've been running into the issue where lblk -O outputs the wwn
instead of the serial for scsi devices. After some debugging I've come
to the conclusing that /lib/udev/scsi_id is the underlying cause. It
outputs the wwn of a disk in the ID_SERIAL_SHORT field, but does also
export the actual serial in a separate field (ID_SCSI_SERIAL).
sample output during udevadm test:
IMPORT 'scsi_id --export --whitelisted -d /dev/sdas'
/lib/udev/rules.d/60-persistent-storage.rules:50
starting 'scsi_id --export --whitelisted -d /dev/sdas'
'scsi_id --export --whitelisted -d /dev/sdas'(out) 'ID_SCSI=1'
'scsi_id --export --whitelisted -d /dev/sdas'(out) 'ID_VENDOR=HGST'
'scsi_id --export --whitelisted -d /dev/sdas'(out)
'ID_VENDOR_ENC=HGST\x20\x20\x20\x20'
'scsi_id --export --whitelisted -d /dev/sdas'(out) 'ID_MODEL=HUS726060ALS640'
'scsi_id --export --whitelisted -d /dev/sdas'(out)
'ID_MODEL_ENC=HUS726060ALS640\x20'
'scsi_id --export --whitelisted -d /dev/sdas'(out) 'ID_REVISION=A280'
'scsi_id --export --whitelisted -d /dev/sdas'(out) 'ID_TYPE=disk'
'scsi_id --export --whitelisted -d /dev/sdas'(out)
'ID_SERIAL=35000cca232ab84ac'
'scsi_id --export --whitelisted -d /dev/sdas'(out)
'ID_SERIAL_SHORT=5000cca232ab84ac'
'scsi_id --export --whitelisted -d /dev/sdas'(out) 'ID_WWN=0x5000cca232ab84ac'
'scsi_id --export --whitelisted -d /dev/sdas'(out)
'ID_WWN_WITH_EXTENSION=0x5000cca232ab84ac'
'scsi_id --export --whitelisted -d /dev/sdas'(out) 'ID_SCSI_SERIAL=
1EK1A65J'
ata devices to not have this issue because they use ata_id:
IMPORT 'ata_id --export /dev/sdad'
/lib/udev/rules.d/60-persistent-storage.rules:38
starting 'ata_id --export /dev/sdad'
'ata_id --export /dev/sdad'(out) 'ID_ATA=1'
'ata_id --export /dev/sdad'(out) 'ID_TYPE=disk'
'ata_id --export /dev/sdad'(out) 'ID_BUS=ata'
'ata_id --export /dev/sdad'(out) 'ID_MODEL=HGST_HDN726060ALE614'
'ata_id --export /dev/sdad'(out)
'ID_MODEL_ENC=HGST\x20HDN726060ALE614\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20'
'ata_id --export /dev/sdad'(out) 'ID_REVISION=APGNW7JH'
'ata_id --export /dev/sdad'(out) 'ID_SERIAL=HGST_HDN726060ALE614_NAHTWX0X'
'ata_id --export /dev/sdad'(out) 'ID_SERIAL_SHORT=NAHTWX0X'
<snip>
'ata_id --export /dev/sdad'(out) 'ID_WWN=0x5000cca242d96928'
'ata_id --export /dev/sdad'(out) 'ID_WWN_WITH_EXTENSION=0x5000cca242d96928'
I am unsure if the fix should be in udev or lsblk, but I wanted to
bring it up for discussion because the serial not being displayed
properly.
Kind regards,
Sven Wiltink
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