-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. Useful if devices have multiple metadata signatures. When activating RAID sets, -p disables the activation of partitions on them. 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 properties (size, serial number). Add -c to display block device names only and -cc for CSV column output of block device properties. See description of -c below for FIELD identifiers.

[-d|--debug]...

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

[-c|--display_columns][FIELD[,FIELD...]]...

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.

{-h|--help}

Display help text.

{-i|--ignorelocking}

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

{-l|--list_formats}

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)

{-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.

{-r|--raid_devices} [device-path...]

List all discovered RAID devices with format, RAID level, sectors 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 metadata signatures. If -D is added to -r the RAID metadata gets dumped into files named devicename_formatname.dat. The offset in sectors where the metadata is located on the device is written into files named devicename_formatname.offset and the size of the device into files named devicename_formatname.size.

If -E is added to -r the RAID metadata on the devices gets conditionally 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 devicename_formatname.dat and devicename_formatname.offset. Eg, to restore all *.dat files in the working directory to the respective devices:

for f in *.dat

do

dd if=$f of=/dev/${f%%_*} \

seek=`cat ${f%%dat}offset` bs=1

done

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 displaying 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.

[-v|--verbose]...

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