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NAME    [Toc]    [Back]

       verify - Checks the AdvFS on-disk metadata structures

SYNOPSIS    [Toc]    [Back]

       /sbin/advfs/verify  [-l   | -d] [-v  | -q] [-t] [-a  | -f]
       [-F] [-D] domain_name

OPTIONS    [Toc]    [Back]

       Checks an active domain. All filesets in the  domain  must
       be  mounted.   Deletes  lost files (that is, files with no
       directory entry).  Checks a domain that  has  been  previously
  mounted  with  the -o dual option of the mount command.
  Attempts to  fix  some  corruptions  found  in  the
       domain;  deletes  any  directory  entries that do not have
       associated files; deletes files that have  storage  bitmap
       or extent map problems; corrects some inconsistencies in a
       storage bitmap.  Use this option with  caution  only  when
       the  domain's fileset(s) will not mount and running verify
       without the -F option  exits  with  the  message  "verify:
       can't get set info for domain".

              When the -F option is used, AdvFS reinitializes the
              domain  transaction  log  without  recovery.  As  a
              result,  no  domain  recovery will occur for previously
 incomplete operations (which can  cause  data
              corruption).  Creates a hard link to a lost file in
              the  /<mountpoint>/lost+found  directory.    Prints
              minimal  file  status  information.   Displays  the
              mcell  totals.   Prints  file  status  information.
              Selecting  this option slows down the verify procedure
 and creates a large volume of output  information.

OPERANDS    [Toc]    [Back]

       Specifies the file domain.

DESCRIPTION    [Toc]    [Back]

       The  verify command mounts all the filesets in a domain at
       temporary mount points to process them and  unmounts  them
       when  finished. If you have chosen the -a option, existing
       mount points will be retained.

       The command checks on-disk structures such as the  bitfile
       metadata  table (BMT), the storage bitmaps, the tag directory,
 and the frag file for each fileset. It verifies that
       the  directory structure is correct and that all directory
       entries reference a valid file (tag) and  that  all  files
       (tags) have a directory entry.

       The  verify  command  checks the storage bitmap for double
       allocations and missing storage. It checks that all mcells
       in  use belong to a bitfile and that all bitfiles have all
       of their mcells.

       The verify command checks the consistency  of  free  lists
       for  mcells and tag directories. It checks that the mcells
       pointed to by tags in the tag directory match  the  corresponding

       For  each fileset in the specified file domain, the verify
       command checks the frag file headers for consistency.  For
       each file that has a fragment, the frag file is checked to
       ensure that the frag is marked as in use.

RESTRICTIONS    [Toc]    [Back]

       You must be the root user to use this command.

       If you want to run the verify command  on  the  root  file
       domain,  choose the -a option to view diagnostic warnings,
       or boot from another disk or installation CD and  use  the
       -f or -d option as shown in the Example section.

       It is recommended that you run the verify command with the
       -f option and unmount all filesets  in  the  file  domain.
       This  option  attempts to repair certain types of metadata
       inconsistencies and allows the most complete recovery.

       If you choose the -a option, not  all  verification  tests
       will  be  run  and  no fixes will be made. In addition, if
       file system activity is occurring, the verify command  may
       report  erroneous diagnostic warnings. This is because the
       utility cross-checks metadata  files  and,  if  these  are
       changing,  inconsistencies may appear that do not actually
       exist.  Therefore, if you choose the -a option,  it  is  a
       good  idea to run in single-user mode, if possible, and to
       restrict system activity.

       If you run the verify command on a fileset  that  has  any
       other  file  system (AdvFS or otherwise) mounted on it, an
       error may result.   If  you  have  a  fileset  erroneously
       labeled as UFS and it overlaps a fileset labeled AdvFS, an
       error results.  You can recover from this error by  changing
  the  erroneously-labeled  fileset's fstype field from
       ufs to unused with the disklabel -s command.  After changing
 the disk label, run the verify command.

       If  the  -F option is specified, the verify command mounts
       the fileset using the mount command with  the  -d  option.
       Because  no  recovery  is  performed, your file domain may
       become inconsistent.

       Choose the -D option to run the verify command if the file
       domain has ever been dual mounted. Running the verify command
 without the -D option on a domain that has been  dual
       mounted  will  report setID conflicts for frag files. Running
 the verify command with the -D option will  skip  the
       frag file setID checks.

EXIT STATUS    [Toc]    [Back]

       The verify utility returns a 0 (zero) on success if it did
       not find any corruption and a positive integer on  success
       if  it  did find corruption.  The verify utility returns a
       -1 on failure.

EXAMPLES    [Toc]    [Back]

       The following example verifies the file domain  dmnx  with
       the filesets setx and sety: # /sbin/advfs/verify dmnx

       +++ Domain verification +++

       Domain Id 2f9eb70a.000f1db0

       Checking disks ...

       Checking storage allocated on disk /dev/disk/dsk10g

       Checking storage allocated on disk /dev/disk/dsk10a

       Checking mcell list ...

       Checking mcell position field ...

       Checking tag directories ...

       +++ Fileset verification +++

       +++ Fileset setx +++

       Checking frag file headers ...

       Checking frag file type lists ...

       Scanning directories and files ...
            300 Scanned 307 directories.

       Scanning tags ...
            1100 Scanned a total of 1135 tags.

       Searching for lost files ...
            1100 Searched 1135 tags, no lost files found.

       +++ Fileset sety +++

       Checking frag file headers ...

       Checking frag file type lists ...

       Scanning directories and files ...
            900 Scanned 911 directories.

       Scanning tags ...
            5100 Scanned a total of 5173 tags.

       Searching for lost files ...
            5100 Searched 5173 tags, no lost files found.  #

       To run the verify command with either the -f or -d options
       on a root domain, you must boot off another disk or CD-ROM
       as  follows:  Boot from your installation CD then exit the
       installation to the UNIX shell or boot from another system
       disk.  Change to the /etc/fdmns directory:

              #  cd  /etc/fdmns  Create a temporary domain directory:

              # mkdir verify_root Change  to  the  newly  created

              #  cd  verify_root  Create  a symbolic link in this
              directory to the disk partition that  contains  the
              domain you wish to run the verify command on:

              #  ln  -s  /dev/disk/dsk3a dsk3a Change back to the
              root directory (/):

              # cd / Run the  verify  command  on  the  temporary

              # /sbin/advfs/verify -f verify_root Delete the temporary

              # rm -rf /etc/fdmns/verify_root

FILES    [Toc]    [Back]

       Commands: fsck(8),  mount(8),  showfdmn(8),  showfsets(8),

       Files: advfs(4)

[ Back ]
 Similar pages
Name OS Title
savemeta Tru64 Takes a snapshot of an AdvFS domain's metadata
mountlist Tru64 Checks for mounted AdvFS filesets
fixfdmn Tru64 Checks and repairs corrupted AdvFS domains.
sync Tru64 Flush file system metadata and data from memory buffers to disk.
sync2 Tru64 Flush file system metadata and data from memory buffers to disk
set_usage Tru64 checks whether a disk partition is in use and sets the fstype of the partition in the disk label
check_usage Tru64 checks whether a disk partition is in use
vn_isdisk FreeBSD checks if a vnode represents a disk
advscan Tru64 Locates AdvFS volumes on disk devices
vdf Tru64 Displays disk information for AdvFS domains and filesets
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