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DMRAID(8)                                                            DMRAID(8)

       dmraid - discover, configure and activate software (ATA)RAID

        {-a|--activate} {y|n|yes|no}
        [-d|--debug]... [-v|--verbose]... [-i|--ignorelocking]
        [-f|--format FORMAT[,FORMAT...]]
        [{-P|--partchar} CHAR]
        [--separator SEPARATOR]

        [-d|--debug]... [-v|--verbose]...
        [--separator SEPARATOR]


        [-d|--debug]... [-v|--verbose]...

        [-d|--debug]... [-v|--verbose]... [-i|--ignorelocking]
        [-f|--format FORMAT[,FORMAT...]]
        [--separator SEPARATOR]

        {-R| --rebuild}

        {-x| --remove}

        -f FORMAT-handler {-C| --create} set
        --type raidlevel
        [--size=setsize --strip stridesize]
        --disk "device-path, device-path [, device-path ...]"

       dmraid  [  -f|--format FORMAT-handler] -S|--spare [RAID-set] -M|--media

        [-d|--debug]... [-v|--verbose]... [-i|--ignorelocking]
        [-f|--format FORMAT[,FORMAT...]]
        [--separator SEPARATOR]

        [-d|--debug]... [-v|--verbose]... [-i|--ignorelocking]
        [-f|--format FORMAT[,FORMAT...]]
        [--separator SEPARATOR]

        [-d|--debug]... [-v|--verbose]... [-i|--ignorelocking]
        [-f|--format FORMAT[,FORMAT...]]
        [--separator SEPARATOR]


       dmraid discovers block and software RAID devices (eg, ATARAID) by using
       multiple  different metadata format handlers which support various for-
       mats (eg, Highpoint 37x series).  It offers activating RAID  sets  made
       up  by 2 or more discovered RAID devices, display properties of devices
       and sets (see option -l for supported metadata formats).  Block  device
       access  to activated RAID sets occurs via device-mapper nodes /dev/map-
       per/RaidSetName.  RaidSetName starts  with  the  format  name  (see  -l
       option)  which can be used to access all RAID sets of a specific format
       easily with certain options (eg, -a below).

       -a, --activate {y|n} [RAID set...]
              Activates or deactivates all or particular  software  RAID  set.
              In  case metadata format handlers are chosen with -f , only RAID
              sets with such format(s) can be activated or deactivated.   Use-
              ful if devices have multiple metadata signatures.  When activat-
              ing RAID sets, -p disables the activation of partitions on them,
              and -Z will make dmraid tell the kernel to remove the partitions
              from the disks underlying the set, ie if sda is part of the set,
              remove   sda1,  sda2,  etc.   This  prevents  applications  from
              directly accessiong the disks bypassing dmraid.  RAID set  names
              given  on  command  line  don't  need to be fully specified (eg,
              "dmraid -ay sil" would activate  all  discovered  Silicon  Image
              Medley RAID sets).

       {-b|--block_devices} [device-path...]
              List all or particular discovered block devices with their prop-
              erties (size, serial number).  Add -c to  display  block  device
              names only and -cc for CSV column output of block device proper-
              ties.  See description of -c below for FIELD identifiers.

              Enable debugging output.  Opion  can  be  given  multiple  times
              increasing the debug output level.

              Display  properties  of  block devices, RAID sets and devices in
              column(s).  Optional list specifying which FIELDs to display.
              For -b:
              d[evpath]|p[ath], sec[tors]|si[ze], ser[ialnumber].
              For -r:
              de[vpath]|p[ath],  f[ormat],   r[aidname],   t[ype],   st[atus],
              se[ctors]|si[ze], da[taoffset]|o[ffset].
              For -s:
              f[ormat],     r[aidname],     t[ype],     sta[tus],    str[ide],
              se[ctors]|si[ze], su[bsets], d[evices], sp[ares].

       [-f|--format FORMAT[,FORMAT...]]
              Use metadata format handler(s) to discover RAID devices.  See -l
              for  a list of supported format handler names. This is useful to
              select particular formats in case multiple  metadata  signatures
              are  found  on  a device. A comma seperated list of format names
              can be specified which may not contain white space.

              Display help text.

              Don't take  out  any  locks.  Useful  in  early  boot  where  no
              read/write access to /var is available.

              List all available metadata format handlers with their names and
              descriptions. Supported RAID levels are listed in parenthesis:

              S: Span (concatination)
              0: RAID0 (stripe)
              1: RAID1 (mirror)
              10: RAID10 (mirror on top of stripes)
              01: RAID10 (stripe on top of mirrors) Note: Intel OROM  displays
              this as RAID10

       {-n|--native_log} [device-path...]
              Display  metadata  in native, vendor-specific format.  In case a
              metadata format handler is chosen with -f only RAID devices with
              such  format  will  be  displayed  in native format.  If device-
              path(s) is/are given on the command line, native metadata output
              is restricted to those listed.

       [{-P|--partchar} CHAR]
              Use CHAR as the separator between the device name and the parti-
              tion number.

       {-R| --rebuild} RAID-set [device-path]
              Rebuild raid array after a drive has failed and a new  drive  is
              added.   For  Intel chipset based systems, there are two methods
              in which a new drive is added to the system.

              1. Using OROM to identify a new drive
                  During system reboot, enter OROM and mark the new  drive  as
              the rebuild drive.
                  After  booting to the OS, use the dmraid command to rebuild.

                  Example: dmraid -R raid_set

              2. Using dmraid to identify a new drive
                  Boot to the OS and use the dmraid command with the new drive
              as the second parameter.

                  Example: dmraid -R raid_set /dev/sdc

              3. Using hot spare drive
                  Mark  a drive as hot spare using the "dmraid -f isw -S" com-
              mand. Then use the dmraid command to start the rebuild.

                  Example: dmraid -R raid_set

       {-x|--remove} [RAID-set]
              Delete one or all existing software RAID devices from the  meta-

       -f   FORMAT-handler   {-C|--create}  --type  raidlevel  [--size=setsize
       --strip stripsize] --disk device-path, device-path [,device-path]
              Delete one or all existing Configure a software RAID device  and
              store the configuration data in a group of  hard  drive  devices
              consisting  of  this  array. This command requires the following

              -f FORMAT-handler
                   metadata format (see "dmraid -l")
              --type digit[digit...]
                   specify the raid level of the software RAID set.
                        0:  raid0
                        1:  raid1
                        5:  raid5
                        01: raid01 (isw raid10)
              --size: [digits[k|K|m|M|g|G][b|B]]
                   specify the size of the RAID set.The number is  an  integer
              followed by [kKmMgG] and/or [bB].
                        b: byte (default)
                        B: block (512 bytes)
                        K or K: on the base of 1024
                        m or M: on the base of 1024*1024
                        g or G: on the base of 1024*1024*1024
              If  this  option  is missing, it's set to the default value pre-
              configured by the vendor. Note that different vendors may  apply
              different constraints on the granularity of the size or the min-
              imal value.
              --strip: [digits[k|K|m|M|g|G][b|B]]
                   specify the strip size of a RAID1, RAID5, and  RAID10  RAID
              set (as above)
              --disk: device-path[{,| }device-path...]
                   specify the array of the hard drives, e.g. /dev/sda.

       -f FORMAT-handler -S -M device-path
              -S -M device-path

              This command adds hot spare support for one or more RAID sets.

              1.  When  used  with  a format handler, which supports hot spare
              sets (e.g. isw), a hot spare is marked to be used when  rebuild-
              ing any RAID set of that format.  2. When used when specifying a
              RAID set, the drive is added to that RAID set and will  be  used
              only  to  rebuild that set. Note: If the specified name does not
              match an existing RAID-set, a set with the new name will be cre-

       {-r|--raid_devices} [device-path...]
              List  all  discovered RAID devices with format, RAID level, sec-
              tors used and data offset into the device.  In case  a  metadata
              format  handler  is chosen with -f , only RAID devices with such
              format can be discovered. Useful if devices have multiple  meta-
              data  signatures.   If  -D is added to -r the RAID metadata gets
              dumped into a subdirectory named  dmraid.format_name  (eg.  for-
              mat_name  = isw) in files named devicename.dat.  The byte offset
              where the metadata is located on  the  device  is  written  into
              files named devicename.offset and the size of the device in sec-
              tors into files named devicename.size.

              If -E is added to -r the RAID metadata on the devices gets  con-
              ditionally  erased.   Useful to erase old metadata after new one
              of different type has been stored on a device in order to  avoid
              discovering  both. If you enter -E option -D will be enforced in
              order to have a fallback in case the wrong metadata got  erased.
              Manual  copying  back  onto the device is needed to recover from
              erasing the  wrong  metadata  using  the  dumped  files  device-
              name_formatname.dat  and  devicename_formatname.offset.   Eg, to
              restore all *.dat files in the working directory to the  respec-
              tive devices:

              for f in *.dat
                   dd if=$f of=/dev/${f%%.dat} \
                   seek=`cat ${f%%dat}offset` bs=1

              If  device-path(s)  is/are  given on the command line, the above
              actions are restricted to those listed.  Add -c to display  RAID
              device  names  only and -cc for CSV column output of RAID device
              properties.  See description of -c above for FIELD  identifiers.

       --separator SEPARATOR
              Use  SEPARATOR as a delimiter for all options taking or display-
              ing lists.

       -s... [a|i] [RAID-set...]
              Display properties of RAID sets. Multiple RAID set names can  be
              given on the command line which don't need to be fully specified
              (eg, "dmraid -s hpt" would display all discovered Highpoint RAID
              sets).  Enter  -s  twice to display RAID subsets too.  Add -c to
              display names of RAID sets only, -cc for CSV  column  output  of
              RAID  set  properties and -ccc for inclusion of block devices in
              the listing. Doesn't imply -s -s to show RAID  subsets  (implied
              for  group sets, e.g. isw).  Add -g to include information about
              group RAID sets (as with Intel Software RAID)  in  the  listing.
              See  description  of -c above for FIELD identifiers.  Note: Size
              is given in sectors (not bytes).

              Enable verbose runtime information output. Opion  can  be  given
              multiple times increasing the verbosity level.

       "dmraid -l" lists all supported metadata formats with their names along
       with some descriptive information, eg:
       hpt37x : (+) Highpoint HPT37X
       hpt45x : (+) Highpoint HPT45X
       isw    : (+) Intel Software RAID
       lsi    : (0) LSI Logic MegaRAID
       nvidia : (+) NVidia RAID
       pdc    : (+) Promise FastTrack
       sil    : (+) Silicon Image(tm) Medley(tm)
       via    : (+) VIA Software RAID
       dos    : (+) DOS partitions on SW RAIDs
       (0): Discover, (+): Discover+Activate

       "dmraid -ay" activates all software RAID sets discovered.

       "dmraid -an" deactivates all active software RAID sets  which  are  not
       open (eg, mounted filesystem on them).

       "dmraid  -ay  -f  pdc"  (pdc  looked up from "dmraid -l") activates all
       software RAID sets with Promise format discovered and ignores all other
       supported formats.

       "dmraid  -r" discovers all software RAID devices supported on your sys-
       tem, eg:
       /dev/dm-46: hpt45x, "hpt45x_chidjhaiaa-0", striped, ok, 320172928  sec-
       tors, data@ 0
       /dev/dm-50:  hpt45x, "hpt45x_chidjhaiaa-0", striped, ok, 320172928 sec-
       tors, data@ 0
       /dev/dm-54: hpt45x, "hpt45x_chidjhaiaa-1", striped, ok, 320172928  sec-
       tors, data@ 0
       /dev/dm-58:  hpt45x, "hpt45x_chidjhaiaa-1", striped, ok, 320172928 sec-
       tors, data@ 0

       "dmraid  -s  -s   hpt45x_chidjhaiaa"   displays   properties   of   set
       "hpt45x_chidjhaiaa", eg:
       *** Superset
       name   : hpt45x_chidjhaiaa
       size   : 640345856
       stride : 128
       type   : raid10
       status : ok
       subsets: 2
       dev    : 4
       spare  : 0
       ---> Subset
       name   : hpt45x_chidjhaiaa-0
       size   : 640345856
       stride : 128
       type   : stripe
       status : ok
       subsets: 0
       dev    : 2
       spare  : 0
       ---> Subset
       name   : hpt45x_chidjhaiaa-1
       size   : 640345856
       stride : 128
       type   : stripe
       status : ok
       subsets: 0
       dev    : 2
       spare  : 0

       "dmraid -s -ccs hpt45" displays properties in column format of all sets
       and subsets with hpt45* format, eg:

       "dmraid -r --sep : -cpath:size" display paths and sizes in sectors  for
       RAID devices in column format using ':' as a delimiter, eg:

       "dmraid -f isw -C Raid0 --type 0 --strip 8k --size 20g --disk "/dev/sdb
       /dev/sdc"" creates an ISW volume with a name of "Raid0", 20Gig bytes in
       total, and 8kilo bytes strip size on two disks.

       "dmraid -f isw -C Test0 --type 0 --disk "/dev/sdd /dev/sde"" creates an
       ISW volume with the default size and strip size.

       "dmraid -f isw -C  Test10  --type  01  --strip  128B  --disk  "/dev/sda
       /dev/sdb  /dev/sdc /dev/sdd" creates a stacked RAID device, RAID10 (isw
       format), with a name of "Test10", 128 blocks (512bytes)  strip  size  ,
       and the default volume size on 4 disks.

       "dmraid -f isw -S -M /dev/sde" marks the device /dev/sde as a hot spare
       for rebuild

       "dmraid -R isw_djaggchdde_RAID1 /dev/sde" starts rebuild  of  the  RAID
       volume on device /dev/sde

       dmraid returns an exit code of 0 for success or 1 for error.

       Heinz Mauelshagen <Mauelshagen@RedHat.com>

Heinz Mauelshagen                 DMRAID TOOL                        DMRAID(8)

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Gedruckt am: 17.12.2017 14:54 GMT+0100 (2017-12-17T14:54:08+01:00)