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Bug#791794: INSTALL REPORT (Jessie on QNAP TS-420U)

Package: installation-reports

Boot method:  network
Image version: http://ftp.debian.org/debian/dists/jessie/main/installer-armel/current/images/kirkwood/network-console/qnap/ts-41x/ 
Date:  June 7, 2015

Machine:  QNAP TS-420U
Processor:  Marvell 1.6 GHz
Memory:  1GB DDR3

Partitions:
Filesystem     Type     1K-blocks   Used Available Use% Mounted on
/dev/md0       ext4      19076820 986676  17098044   6% /
udev           devtmpfs     10240      0     10240   0% /dev
tmpfs          tmpfs       206704   4436    202268   3% /run
tmpfs          tmpfs       516752      0    516752   0% /dev/shm
tmpfs          tmpfs         5120      0      5120   0% /run/lock
tmpfs          tmpfs       516752      0    516752   0% /sys/fs/cgroup


Output of lspci -knn (or lspci -nn):
00:00.0 Host bridge [0600]: Marvell Technology Group Ltd. Device [11ab:6282] (rev 01) 
        Subsystem: Marvell Technology Group Ltd. Device [11ab:11ab]
00:01.0 SCSI storage controller [0100]: Marvell Technology Group Ltd. 88SX7042 PCI-e 4-port SATA-II [11ab:7042] (rev 02) 
        Subsystem: Marvell Technology Group Ltd. Device [11ab:11ab]
        Kernel driver in use: sata_mv
01:00.0 Host bridge [0600]: Marvell Technology Group Ltd. Device [11ab:6282] (rev 01) 
        Subsystem: Marvell Technology Group Ltd. Device [11ab:11ab]
01:01.0 USB controller [0c03]: Etron Technology, Inc. EJ168 USB 3.0 Host Controller [1b6f:7023] (rev 01) Subsystem: Etron Technology, Inc. EJ168 USB 3.0 Host Controller [1b6f:7023] 
        Kernel driver in use: xhci_hcd


Base System Installation Checklist:
[O] = OK, [E] = Error (please elaborate below), [ ] = didn't try it

Initial boot:           [O]
Detect network card:    [O]
Configure network:      [O]
Detect CD:              [ ]
Load installer modules: [O]
Detect hard drives:     [O]
Partition hard drives:  [O]
Install base system:    [O]
Clock/timezone setup:   [O]
User/password setup:    [O]
Install tasks:          [O]
Install boot loader:    [E]
Overall install:        [E]

Comments/Problems:
The problem seems to appear only when jessie is installed to RAID (e.g. RAID1)! 
Error message:
flash-kernel-installer does not find UUID (see the two lines of syslog below): in-target: UUID eeb34bbe-375a-4dc1-939d-f56b801a4c75 doesn't exist in /dev/disk/by-uuid in-target: Warning: root device /dev/disk/by-uuid/eeb34bbe-375a-4dc1-939d-f56b801a4c75 does not exist 
Quickfix:
When using the command 'udevadm trigger' before base-install the installer is able to install the boot loader and to finish the installation 
(compare http://forum.qnap.com/viewtopic.php?f=147&t=111076).
After reboot the new installed jessie is starting as expected.
Output of mdstat (cat /proc/mdstat):
  Used RAID1 for Debian installation:
  Personalities : [raid1]
  md0 : active raid1 sdc2[2] sdd2[3](S) sdb2[1] sda2[0]
        19514368 blocks super 1.2 [3/3] [UUU]
PROBLEM:
When I shutdown the system and remove any (active) harddisk (from RAID1) the system has problems to boot again. 
Error message (from bootlog at serial console)
  Gave up waiting for root device.  Common problems:
       - Boot args (cat /proc/cmdline)
         - Check rootdelay= (did the system wait long enough?)
         - Check root= (did the system wait for the right device?)
       - Missing modules (cat /proc/modules; ls /dev)
ALERT! /dev/disk/by-uuid/61f390f9-c1db-4fbe-acd7-dd61bbcaeeca does not exist. Dropping to a shell! 
-----------
For comparision:
I've done the same kind of installation with oldstable (= wheezy) which is able to boot without problems even though two (out of three) active disks are missing. (see https://www.mail-archive.com/debian-bugs-dist%40lists.debian.org/msg1336095.html)

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