LVM hängt beim Versuch, meinen Root-Geräteknoten zu erstellen

Question

Aus den zusätzlichen Informationen, die Sie bereitgestellt haben, klingt es, als ob Sie ein defektes Laufwerk (defekte Blöcke) hätten. Sie können versuchen, diese Probleme zu umgehen, wenn Sie möchten, aber ich würde ernsthaft in Erwägung ziehen, das Laufwerk auszutauschen.

Wenn Sie das Problem umgehen möchten, müssen Sie grundsätzlich die physischen LVM-Bereiche finden, die über den fehlerhaften Blöcken liegen, und diese physischen Bereiche einem logischen Datenträger hinzufügen, der nicht verwendet werden darf.

Zu diesem Thema gibt es tatsächlich eine recht neue E-Mail-Kette auf der Linux-LVM-Mailingliste (ich habe die ganze Kette gelesen, sie enthält eine Menge Informationen):

https://www.redhat.com/archives/linux-lvm/2012-November/msg00033.html

Bei dieser speziellen Nachricht sieht es so aus, als hätte jemand ein Python-Skript erstellt, um bei der Aufgabe zu helfen:

https://www.redhat.com/archives/linux-lvm/2012-November/msg00038.html

Nachdem ich Leuten in solchen Situationen geholfen habe (wo zumindest das Internet funktionierte), habe ich das beigefügte Skript verwendet, um betroffene LVs und Dateien zu finden.

#!/usr/bin/python
# Identify partition, LV, file containing a sector 

# Copyright (C) 2010,2012 Stuart D. Gathman
# Shared under GNU Public License v2 or later
#   This program is free software; you can redistribute it and/or modify
#   it under the terms of the GNU General Public License as published by
#   the Free Software Foundation; either version 2 of the License, or
#   (at your option) any later version.

#   This program is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#   GNU General Public License for more details.

#   You should have received a copy of the GNU General Public License along
#   with this program; if not, write to the Free Software Foundation, Inc.,
#   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

import sys
from subprocess import Popen,PIPE

ID_LVM = 0x8e
ID_LINUX = 0x83
ID_EXT = 0x05
ID_RAID = 0xfd

def idtoname(id):
  if id == ID_LVM: return "Linux LVM"
  if id == ID_LINUX: return "Linux Filesystem"
  if id == ID_EXT: return "Extended Partition"
  if id == ID_RAID: return "Software RAID"
  return hex(id)

class Segment(object):
  __slots__ = ('pe1st','pelst','lvpath','le1st','lelst')
  def __init__(self,pe1st,pelst):
    self.pe1st = pe1st;
    self.pelst = pelst;
  def __str__(self):
    return "Seg:%d-%d:%s:%d-%d" % (
      self.pe1st,self.pelst,self.lvpath,self.le1st,self.lelst)

def cmdoutput(cmd):
  p = Popen(cmd, shell=True, stdout=PIPE)
  try:
    for ln in p.stdout:
      yield ln
  finally:
    p.stdout.close()
    p.wait()

def icheck(fs,blk):
  "Return inum from block number, or 0 if free space."
  for ln in cmdoutput("debugfs -R 'icheck %d' '%s' 2>/dev/null"%(blk,fs)):
    b,i = ln.strip().split(None,1)
    if not b[0].isdigit(): continue
    if int(b) == blk:
      if i.startswith('<'):
    return 0
      return int(i)
  raise ValueError('%s: invalid block: %d'%(fs,blk))

def ncheck(fs,inum):
  "Return filename from inode number, or None if not linked."
  for ln in cmdoutput("debugfs -R 'ncheck %d' '%s' 2>/dev/null"%(inum,fs)):
    i,n = ln.strip().split(None,1)
    if not i[0].isdigit(): continue
    if int(i) == inum:
      return n
  return None

def blkid(fs):
  "Return dictionary of block device attributes"
  d = {}
  for ln in cmdoutput("blkid -o export '%s'"%fs):
    k,v = ln.strip().split('=',1)
    d[k] = v
  return d

def getpvmap(pv):
  pe_start = 192 * 2
  pe_size = None
  seg = None
  segs = []
  for ln in cmdoutput("pvdisplay --units k -m %s"%pv):
    a = ln.strip().split()
    if not a: continue
    if a[0] == 'Physical' and a[4].endswith(':'):
      pe1st = int(a[2])
      pelst = int(a[4][:-1])
      seg = Segment(pe1st,pelst)
    elif seg and a[0] == 'Logical':
      if a[1] == 'volume':
    seg.lvpath = a[2]
      elif a[1] == 'extents':
    seg.le1st = int(a[2])
    seg.lelst = int(a[4])
    segs.append(seg)
    elif a[0] == 'PE' and a[1] == 'Size':
      if a[2] == "(KByte)":
    pe_size = int(a[3]) * 2
      elif a[3] == 'KiB':
    pe_size = int(float(a[2])) * 2
  if segs:
    for ln in cmdoutput("pvs --units k -o+pe_start %s"%pv):
      a = ln.split()
      if a[0] == pv:
        lst = a[-1]
    if lst.lower().endswith('k'):
      pe_start = int(float(lst[:-1]))*2
      return pe_start,pe_size,segs
  return None

def findlv(pv,sect):
  res = getpvmap(pv)
  if not res: return None
  pe_start,pe_size,m = res
  if sect < pe_start:
    raise Exception("Bad sector in PV metadata area")
  pe = int((sect - pe_start)/pe_size)
  pebeg = pe * pe_size + pe_start
  peoff = sect - pebeg
  for s in m:
    if s.pe1st <= pe <= s.pelst:
      le = s.le1st + pe - s.pe1st
      return s.lvpath,le * pe_size + peoff

def getmdmap():
  with open('/proc/mdstat','rt') as fp:
    m = []
    for ln in fp:
      if ln.startswith('md'):
    a = ln.split(':')
    raid = a[0].strip()
    devs = []
    a = a[1].split()
    for d in a[2:]:
      devs.append(d.split('[')[0])
    m.append((raid,devs))
    return m

def parse_sfdisk(s):
  for ln in s:
    try:
      part,desc = ln.split(':')
      if part.startswith('/dev/'):
        d = {}
        for p in desc.split(','):
      name,val = p.split('=')
      name = name.strip()
      if name.lower() == 'id':
        d[name] = int(val,16)
      else:
        d[name] = int(val)
    yield part.strip(),d
    except ValueError:
      continue

def findpart(wd,lba):
  s = cmdoutput("sfdisk -d %s"%wd)
  parts = [ (part,d['start'],d['size'],d['Id']) for part,d in parse_sfdisk(s) ]
  for part,start,sz,Id in parts:
    if Id == ID_EXT: continue
    if start <= lba < start + sz:
      return part,lba - start,Id
  return None

if __name__ == '__main__':
  wd = sys.argv[1]
  lba = int(sys.argv[2])
  print wd,lba,"Whole Disk"
  res = findpart(wd,lba)
  if not res:
    print "LBA is outside any partition"
    sys.exit(1)
  part,sect,Id = res
  print part,sect,idtoname(Id)
  if Id == ID_LVM:
    bd,sect = findlv(part,sect)
    # FIXME: problems if LV is snapshot
  elif Id == ID_LINUX:
    bd = part
  else:
    if Id == ID_RAID:
      for md,devs in getmdmap():
    for dev in devs:
      if part == "/dev/"+dev:
        part = "/dev/"+md
        break
        else: continue
    break
    res = findlv(part,sect)
    if res:
      print "PV =",part
      bd,sect = res
    else:
      bd = part
  blksiz = 4096
  blk = int(sect * 512 / blksiz)
  p = blkid(bd)
  try:
    t = p['TYPE']
  except:
    print bd,p
    raise
  print "fs=%s block=%d %s"%(bd,blk,t)
  if t.startswith('ext'):
    inum = icheck(bd,blk)
    if inum:
      fn = ncheck(bd,inum)
      print "file=%s inum=%d"%(fn,inum)
    else:
      print "<free space>"

Answer 1