[Bug 1611277] Re: Kernel Shipped With Ubuntu 16.04.1 Cannot Recognize fakeRaid

Fri Aug 19 08:04:32 UTC 2016

Sorry, I was distracted by other things. So I will be attaching a
proposed update to dmraid and some pre-built package to test. I just
cannot promise that change will be accepted.

About converting to mdadm: That would be an option that might be more
future proof but only if you do not want to use the RAIDed disks in
parallel with Windows. The drivers that come with the motherboard rely
on the BIOS signatures and I am not aware (I never had need, so I never
searched) of any generic RAID driver for Windows that would recognize
the DDF signatures that mdadm creates.

If you only will be using Linux it is a different story. Then moving to
mdadm (you can then use even the normal superblock format, no strict
need for DDF) would have the additional benefit of being able to replace
the motherboard or move the disks to a different computer and have the
RAID still working. But of course its a tedious task: you need some
place to backup all data, also better make sure the backup has no bits
corrupted (maybe rare but happened), erase the RAID signatures (if
possible, from the BIOS), either plug the disks to a different
controller or switch the current one into SATA/AHCI mode, set up the
mdamd RAID and finally copy the backup back (and possibly again check
for consistency). A lot of work...

** Patch added: "Proposed update for dmraid"
   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1611277/+attachment/4723888/+files/disable-removable-test.debdiff

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https://bugs.launchpad.net/bugs/1611277

Title:
  Kernel Shipped With Ubuntu 16.04.1 Cannot Recognize fakeRaid

Status in dmraid package in Ubuntu:
  Confirmed
Status in linux package in Ubuntu:
  Invalid
Status in dmraid source package in Xenial:
  New
Status in linux source package in Xenial:
  Invalid

Bug description:
  Kernel shipped with Ubuntu 16.04.1 cannot recognize fakeRaid created
  from Ubuntu 14.04. I've tried three ways but none of them work.

  1. Update 14.04.4 to 16.04.1
  2. Fresh install 16.04.1
  3. Update kernel to linux-images-4.4.0-34-generic only

  The result is that the mapper was seperated into /dev/sdb and /dev/sdc
  and cannot be rebuild with dmraid (said no raid disk) or mdadm (said
  no superblock).

  Something interesting is that when I reinstall Ubuntu 14.04.2 with my
  old CD, during the installation Ubuntu is able to recognize
  /dev/mapper/.... But when I do a fresh install in Ubuntu 16.04 with
  the CD, I get /dev/sdb and /dev/sdc

  The motherboard I'm using is Gigabyte X79-UP4

  The fakeRaid with Marvell chipset on my motherboard shows the following information with fdisk in Ubuntu 16.04.1.
  /dev/sda is where the system is installed. It is a normal hard drive.
  /dev/sdb and /dev/sdc are using raid 1.

  Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
  255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors
  Units = sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 4096 bytes
  I/O size (minimum/optimal): 4096 bytes / 4096 bytes
  Disk identifier: 0x000b7321

     Device Boot      Start         End      Blocks   Id  System
  /dev/sda1   *        2048      499711      248832   83  Linux
  /dev/sda2          501758  1953523711   976510977    5  Extended
  Partition 2 does not start on physical sector boundary.
  /dev/sda5          501760  1953523711   976510976   8e  Linux LVM

  Disk /dev/sdb: 2000.4 GB, 2000398934016 bytes
  255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 sectors
  Units = sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 4096 bytes
  I/O size (minimum/optimal): 4096 bytes / 4096 bytes
  Disk identifier: 0x00000000

  Disk /dev/sdb doesn't contain a valid partition table

  Disk /dev/sdc: 2000.4 GB, 2000398934016 bytes
  255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 sectors
  Units = sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 4096 bytes
  I/O size (minimum/optimal): 4096 bytes / 4096 bytes
  Disk identifier: 0x00000000

  Disk /dev/sdc doesn't contain a valid partition table

  Disk /dev/mapper/ubuntu--vg-root: 982.8 GB, 982805118976 bytes
  255 heads, 63 sectors/track, 119485 cylinders, total 1919541248 sectors
  Units = sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 4096 bytes
  I/O size (minimum/optimal): 4096 bytes / 4096 bytes
  Disk identifier: 0x00000000

  Disk /dev/mapper/ubuntu--vg-root doesn't contain a valid partition
  table

  Disk /dev/mapper/ubuntu--vg-swap_1: 17.1 GB, 17091788800 bytes
  255 heads, 63 sectors/track, 2077 cylinders, total 33382400 sectors
  Units = sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 4096 bytes
  I/O size (minimum/optimal): 4096 bytes / 4096 bytes
  Disk identifier: 0x00000000

  Disk /dev/mapper/ubuntu--vg-swap_1 doesn't contain a valid partition
  table

  The fakeRaid with Marvell chipset on my motherboard shows the
  following information with fdisk in Ubuntu 14.04.4.

  Disk /dev/mapper/ddf1_00000000000000004b1b92914b1b92914b0400004b040001: 2000.3 GB, 2000315047936 bytes
  255 heads, 63 sectors/track, 243191 cylinders, total 3906865328 sectors
  Units = sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 4096 bytes
  I/O size (minimum/optimal): 4096 bytes / 4096 bytes
  Disk identifier: 0x3b9fee89

                                                           Device Boot      Start         End      Blocks   Id  System
  /dev/mapper/ddf1_00000000000000004b1b92914b1b92914b0400004b040001p1            2048  3906865151  1953431552   83  Linux

  Disk /dev/mapper/ddf1_00000000000000004b1b92914b1b92914b0400004b040001p1: 2000.3 GB, 2000313909248 bytes
  255 heads, 63 sectors/track, 243190 cylinders, total 3906863104 sectors
  Units = sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 4096 bytes
  I/O size (minimum/optimal): 4096 bytes / 4096 bytes
  Disk identifier: 0x00000000

  Disk /dev/mapper/ddf1_00000000000000004b1b92914b1b92914b0400004b040001p1 doesn't contain a valid partition table
  ---
  ApportVersion: 2.14.1-0ubuntu3.21
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  bblab      6762 F.... pulseaudio
   /dev/snd/controlC0:  bblab      6762 F.... pulseaudio
  DistroRelease: Ubuntu 14.04
  HibernationDevice: RESUME=UUID=433bcdda-b73d-47e7-abb8-8fab93db4123
  InstallationDate: Installed on 2016-07-26 (14 days ago)
  InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
  MachineType: Gigabyte Technology Co., Ltd. To be filled by O.E.M.
  Package: linux (not installed)
  ProcFB: 0 nouveaufb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-34-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 4.4.0-34.53~14.04.1-generic 4.4.15
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-34-generic N/A
   linux-backports-modules-4.4.0-34-generic  N/A
   linux-firmware                            1.127.22
  RfKill:

  Tags:  trusty
  Uname: Linux 4.4.0-34-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 12/16/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: F5
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: X79-UP4
  dmi.board.vendor: Gigabyte Technology Co., Ltd.
  dmi.board.version: To be filled by O.E.M.
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF5:bd12/16/2013:svnGigabyteTechnologyCo.,Ltd.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rnX79-UP4:rvrTobefilledbyO.E.M.:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: To be filled by O.E.M.
  dmi.product.version: To be filled by O.E.M.
  dmi.sys.vendor: Gigabyte Technology Co., Ltd.

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