------- Comment From mauri...@br.ibm.com 2016-02-04 06:30 EDT-------
The test packages did not work by themselves as the LPAR uses *ibmvfc* and not 
ibmvscsi (sorry, I confused that), which has *async* SCSI scan.

So, this bug needs this patch *and* the multipathd/initramfs patch
(which doesn't fix this by itself, as verified earlier).

I'll build v1 test packages.

...
[    1.558539] ibmvfc: IBM Virtual Fibre Channel Driver version: 1.0.11 (April 
12, 2013)
[    1.568548] scsi host0: IBM POWER Virtual FC Adapter
[    1.578741] ibmvfc 30000004: Partner initialization complete
[    1.588527] ibmvfc 30000004: Host partition: maplev1, device: vfchost2 
U78CB.001.WZS0249-P1-C6-T1 U8247.22L.211B3DA-V2-C12 max sectors 2048
...
Begin: Discovering multipaths ... [    5.179191] device-mapper: multipath 
round-robin: version 1.0.0 loaded
[    5.179424] device-mapper: table: 252:2: multipath: error getting device
[    5.179431] device-mapper: ioctl: error adding target to table
[    5.205784] device-mapper: table: 252:2: multipath: error getting device
[    5.205803] device-mapper: ioctl: error adding target to table
[    5.338527] device-mapper: table: 252:6: multipath: error getting device
[    5.338558] device-mapper: ioctl: error adding target to table
[    5.399409] device-mapper: table: 252:6: multipath: error getting device
[    5.399440] device-mapper: ioctl: error adding target to table
[    5.509069] device-mapper: table: 252:6: multipath: error getting device
[    5.509100] device-mapper: ioctl: error adding target to table
[    5.569473] device-mapper: table: 252:6: multipath: error getting device
[    5.569518] device-mapper: ioctl: error adding target to table
[    5.669295] device-mapper: table: 252:6: multipath: error getting device
[    5.669329] device-mapper: ioctl: error adding target to table
[    5.759009] device-mapper: table: 252:6: multipath: error getting device
[    5.759047] device-mapper: ioctl: error adding target to table
[    5.858710] device-mapper: table: 252:6: multipath: error getting device
[    5.858741] device-mapper: ioctl: error adding target to table
[    5.899505] device-mapper: table: 252:6: multipath: error getting device
[    5.899536] device-mapper: ioctl: error adding target to table
[    6.008594] device-mapper: table: 252:6: multipath: error getting device
[    6.008631] device-mapper: ioctl: error adding target to table
[    6.069401] device-mapper: table: 252:6: multipath: error getting device
[    6.069427] device-mapper: ioctl: error adding target to table
done.

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https://bugs.launchpad.net/bugs/1540401

Title:
  ISST-LTE: Ubuntu14.04.4 lpar fails to boot after installation: "The
  disk drive for /boot is not ready yet or not present"

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