Re: What is the correct way to reuse an existing RAID/LVM configuration

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On 2013-08-22 20:05, Anders Blomdell wrote:
On a system with the following disk layout:


   Disk /dev/sda: 2000.4 GB, 2000398934016 bytes, 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 label type: dos
   Disk identifier: 0x83dae9c4

      Device Boot      Start         End      Blocks   Id  System
   /dev/sda4            2048  3907029167  1953513560    5  Extended
   /dev/sda5            4096     4198399     2097152   fd  Linux raid autodetect
   /dev/sda6         4200448  3907029167  1951414360   fd  Linux raid autodetect

   Disk /dev/sdb: 2000.4 GB, 2000398934016 bytes, 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 label type: dos
   Disk identifier: 0x88b817cf

      Device Boot      Start         End      Blocks   Id  System
   /dev/sdb4            2048  3907029167  1953513560    5  Extended
   /dev/sdb5            4096     4198399     2097152   fd  Linux raid autodetect
   /dev/sdb6         4200448  3907029167  1951414360   fd  Linux raid autodetect
   PV         VG   Fmt  Attr PSize PFree
   /dev/md1   vg0  lvm2 a--  1.82t 1.63t

   LV   VG   Attr      LSize  Pool Origin Data%  Move Log Copy%  Convert
   opt  vg0  -wi-a---- 60.00g
   root vg0  -wi-a---- 60.00g
   src  vg0  -wi-d---- 60.00g
   swap vg0  -wi-a---- 16.00g

I'm trying to kickstart a Fedora-19 system with the following partitioning:

   part raid.0a --onpart=sda5 --noformat
   part raid.0b --onpart=sdb5 --noformat
   raid /boot --fstype=ext4 --level=1 --device=md0 raid.0a raid.0b

   part raid.1a --onpart=sda6 --noformat
   part raid.1b --onpart=sdb6 --noformat
   raid pv.0 --level=1 --device=md1 raid.1a raid.1b

   volgroup vg0 --noformat pv.0
   logvol /    --vgname=vg0 --useexisting --name=root --fstype=ext4
   logvol swap --vgname=vg0 --useexisting --name=swap
   logvol /opt --vgname=vg0 --useexisting --name=opt  --fstype=ext4

Using  the partitioning info returned in anaconda-ks.cfg from a manual install on the same disk:

  part raid.8 --fstype="mdmember" --noformat --onpart=sdb5
  part raid.2 --fstype="mdmember" --noformat --onpart=sda5
  part raid.9 --fstype="mdmember" --noformat --onpart=sdb6
  part raid.4 --fstype="mdmember" --noformat --onpart=sda6
  raid /boot --device=nieman:0 --fstype="ext4" --level=1 --useexisting --label=boot raid.2 raid.8
  raid pv.5 --device=nieman:1 --fstype="lvmpv" --level=1 --noformat --useexisting raid.4 raid.9
  volgroup vg0 --noformat --pesize=32768 --useexisting pv.5
  logvol /opt  --fstype="ext4" --useexisting --label="opt" --name=opt --vgname=vg0
  logvol /  --fstype="ext4" --useexisting --label="root" --name=root --vgname=vg0
  logvol /usr/src  --fstype="ext4" --noformat --useexisting --label="/usr/src" --name=src --vgname=vg0
  logvol swap  --fstype="swap" --useexisting --name=swap --vgname=vg0


Fails with:
  Members may not be specified for preexisting RAID device



But it fails miserably with:


   Traceback (most recent call first):
   File "/usr/lib/python2.7/site-packages/blivet/devices.py", line 789, in create
     raise DeviceCreateError(str(e), self.name)
   File "/usr/lib/python2.7/site-packages/blivet/deviceaction.py", line 272, in execute
     self.device.create()
   File "/usr/lib/python2.7/site-packages/blivet/devicetree.py", line 237, in processActions
     action.execute()
   File "/usr/lib/python2.7/site-packages/blivet/__init__.py", line 310, in doIt
     self.devicetree.processActions()
   File "/usr/lib/python2.7/site-packages/blivet/__init__.py", line 169, in turnOnFilesystems
     storage.doIt()
   File "/usr/lib64/python2.7/site-packages/pyanaconda/install.py", line 140, in doInstall
     turnOnFilesystems(storage, mountOnly=flags.flags.dirInstall)
   File "/usr/lib64/python2.7/threading.py", line 764, in run
     self.__target(*self.__args, **self.__kwargs)
   File "/usr/lib64/python2.7/site-packages/pyanaconda/threads.py", line 168, in run
     threading.Thread.run(self, *args, **kwargs)
   DeviceCreateError: ('mdcreate failed for /dev/md/1: running mdadm --create /dev/md/1 --run --level=1 --raid-devices=2 --metadata=default --bitmap=internal /dev/sda6 /dev/sdb6 failed', '1')


Any help is appreciated.

/Anders


--
Anders Blomdell                  Email: anders.blomdell@xxxxxxxxxxxxxx
Department of Automatic Control
Lund University                  Phone:    +46 46 222 4625
P.O. Box 118                     Fax:      +46 46 138118
SE-221 00 Lund, Sweden

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