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diff --git a/mdadm.man b/mdadm.man deleted file mode 100644 index 6c7895d..0000000 --- a/mdadm.man +++ /dev/null @@ -1,423 +0,0 @@ -mdadm(8) mdadm(8) - - - -NNAAMMEE - mdadm - manage MD devices _a_k_a Linux Software Raid. - - -SSYYNNOOPPSSIISS - mmddaaddmm _[_m_o_d_e_] _<_r_a_i_d_d_e_v_i_c_e_> _[_o_p_t_i_o_n_s_] _<_s_u_b_d_e_v_i_c_e_s_> - - -DDEESSCCRRIIPPTTIIOONN - RAID devices are virtual devices created from two or more - real block devices. This allows multiple devices (typi- - cally disk drives or partitions there-of) to be combined - into a single device to hold (for example) a single - filesystem. Some RAID levels included redundancy and so - can survive some degree of device failure. - - Linux Software RAID devices are implemented through the md - (Multiple Devices) device driver. - - Currently, Linux supports LLIINNEEAARR md devices, RRAAIIDD00 (strip- - ing), RRAAIIDD11 (mirroring), RRAAIIDD44 and RRAAIIDD55.. - - Recent kernels (2002) also support a mode known as MMUULLTTII-- - PPAATTHH. mmddaaddmm does not support MULTIPATH as yet. - - mmddaaddmm is a program that can be used to create, manage, and - monitor MD devices. As such it provides a similar set of - functionality to the rraaiiddttoooollss packages. The key differ- - ences between mmddaaddmm and rraaiiddttoooollss are: - - +o mmddaaddmm is a single program and not a collection of pro- - grams. - - +o mmddaaddmm can perform (almost) all of its functions with- - out having a configuration file. Also mdadm helps - with management of the configuration file. - - +o mmddaaddmm can provide information about your arrays - (through Detail and Examine) that rraaiiddttoooollss cannot. - - +o rraaiiddttoooollss can manage MULTIPATH devices which mmddaaddmm - cannot yet manage. - - -MMOODDEESS - mdadm has 7 major modes of operation: - - AAsssseemmbbllee - Assemble the parts of a previously created array - into an active array. Components can be explicitly - given or can be searched for. mmddaaddmm checks that - the components do form a bona fide array, and can, - on request, fiddle superblock information so as to - assemble a faulty array. - - - BBuuiilldd Build a legacy array without per-device - superblocks. - - - CCrreeaattee Create a new array with per-device superblocks. - - - DDeettaaiill Display the details of a given md device. Details - include the RAID level, the number of devices, - which ones are faulty (if any), and the array UUID. - - - EExxaammiinnee - Examine a device to see if it is part of an md - array, and print out the details of that array. - This mode can also be used to examine a large num- - ber of devices and to print out a summary of the - arrays found in a format suitable for the - mmddaaddmm..ccoonnff configuration file. - - - FFoollllooww oorr MMoonniittoorr - Monitor one or more md devices and act on any state - changes. - - - MMaannaaggee This is for odd bits an pieces like hotadd, - hotremove, setfaulty, stop, readonly, readwrite. - - -OOPPTTIIOONNSS - Available options are: - - - --AA, ----aasssseemmbbllee - Assemble an existing array. - - - --BB, ----bbuuiilldd - Build a legacy array without superblocks. - - - --CC, ----ccrreeaattee - Create a new array. - - - --DD, ----ddeettaaiill - Print detail of one or more md devices. - - - --EE, ----eexxaammiinnee - Print content of md superblock on device(s). - - - --FF, ----ffoollllooww, ----mmoonniittoorr - Select MMoonniittoorr mode. - - - --hh, ----hheellpp - Display help message or, after above option, mode - specific help message. - - - --VV, ----vveerrssiioonn - Print version information for mdadm. - - - --vv, ----vveerrbboossee - Be more verbose about what is happening. - - - --bb, ----bbrriieeff - Be less verbose. This is used with ----ddeettaaiill and - ----eexxaammiinnee. - - -FFoorr ccrreeaattee oorr bbuuiilldd:: - --cc, ----cchhuunnkk== - Specify chunk size of kibibytes. The default is - 64. - - - ----rroouunnddiinngg== - Specify rounding factor for linear array (==chunk - size) - - - --ll, ----lleevveell== - Set raid level. Options are: linear, raid0, 0, - stripe, raid1, 1, mirror, raid5, 4, raid5, 5. - Obviously some of these are synonymous. Only the - first 4 are valid when Building. - - - --pp, ----ppaarriittyy== - Set raid5 parity algorithm. Options are: - {left,right}-{,a}symmetric, la, ra, ls, rs. The - default is left-symmetric. - - - ----llaayyoouutt== - same as --parity - - - --nn, ----rraaiidd--ddiisskkss== - number of active devices in array. - - - --xx, ----ssppaarree--ddiisskkss== - number of spare (eXtra) disks in initial array. - Spares can be added and removed later. - - - --zz, ----ssiizzee== - Amount (in Kibibytes) of space to use from each - drive in RAID1/4/5. This must be a multiple of the - chunk size, and must leave about 128Kb of space at - the end of the drive for the RAID superblock. If - this is not specified (as it normally is not) the - smallest drive (or partition) sets the size, though - if there is a variance among the drives of greater - than 1%, a warning is issued. - - -FFoorr aasssseemmbbllee:: - --uu, ----uuuuiidd== - uuid of array to assemble. Devices which don't have - this uuid are excluded - - - --mm, ----ssuuppeerr--mmiinnoorr== - Minor number of device that array was created for. - Devices which don't have this minor number are - excluded. If you create an array as /dev/md1, then - all superblock will contain the minor number 1, - even if the array is later assembled as /dev/md2. - - - --cc, ----ccoonnffiigg== - config file. Default is //eettcc//mmddaaddmm..ccoonnff. - - - --ss, ----ssccaann - scan config file for missing information - - - --ff, ----ffoorrccee - Assemble the array even if some superblocks appear - out-of-date - - - --RR, ----rruunn - Attempt to start the array even if fewer drives - were given than are needed for a full array. Nor- - mally if not all drives are found and ----ssccaann is not - used, then the array will be assembled but not - started. With ----rruunn an attempt will be made to - start it anyway. - - -GGeenneerraall mmaannaaggeemmeenntt - --aa, ----aadddd - hotadd listed devices. - - - --rr, ----rreemmoovvee - remove listed devices. The must not be active. - i.e. they should be failed or spare devices. - - - --ff, ----ffaaiill - mark listed devices as faulty. - - - ----sseett--ffaauullttyy - same as --fail. - - - --RR, ----rruunn - start a partially built array. - - - --SS, ----ssttoopp - deactivate array, releasing all resources. - - - --oo, ----rreeaaddoonnllyy - mark array as readonly. - - - --ww, ----rreeaaddwwrriittee - mark array as readwrite. - - - -AASSSSEEMMBBLLYY MMOODDEE - Usage: mmddaaddmm ----aasssseemmbbllee _d_e_v_i_c_e _o_p_t_i_o_n_s_._._. - - Usage: mmddaaddmm ----aasssseemmbbllee ----ssccaann _o_p_t_i_o_n_s_._._. - - - This usage assembles one or more raid arrays from pre- - existing components. For each array, mdadm needs to know - the md device, the identity of the array, and a number of - sub devices. These can be found in a number of ways. - - The md device is either given before ----ssccaann or is found - from the config file. In the latter case, multiple md - devices can be started with a single mdadm command. - - The identity can be given with the ----uuuuiidd option, with the - ----ssuuppeerr--mmiinnoorr option, can be found in in the config file, - or will be taken from the super block on the first subde- - vice listed on the command line. - - Devices can be given on the ----aasssseemmbbllee command line or - from the config file. Only devices which have an md - superblock which contains the right identity will be con- - sidered for any device. - - The config file is only used if explicitly named with - ----ccoonnffiigg or requested with ----ssccaann.. In the later case, - //eettcc//mmddaaddmm..ccoonnff is used. - - If ----ssccaann is not given, then the config file will only be - used to find the identity of md arrays. - - Normally the array will be started after it is assembled. - However is ----ssccaann is not given and insufficient drives - were lists to start a complete (non-degraded) array, then - the array is not started (to guard against usage errors). - To insist that the array be started in this case (as may - work for RAID1 or RAID5), give the ----rruunn flag. - - - -BBUUIILLDD MMOODDEE - Usage: mmddaaddmm ----bbuuiilldd _d_e_v_i_c_e ----cchhuunnkk==_X ----lleevveell==_Y ----rraaiidd-- - ddiisskkss==_Z _d_e_v_i_c_e_s - - - This usage is similar to ----ccrreeaattee. The difference is that - it creates a legacy array without a superblock. With these - arrays there is no difference between initially creating - the array and subsequently assembling the array, except - that hopefully there is useful data there in the second - case. - - The level may only be 0, raid0, or linear. All devices - must be listed and the array will be started once com- - plete. - - -CCRREEAATTEE MMOODDEE - Usage: mmddaaddmm ----ccrreeaattee _d_e_v_i_c_e ----cchhuunnkk==_X ----lleevveell==_Y - ----rraaiidd--ddiisskkss==_Z _d_e_v_i_c_e_s - - - This usage will initialise a new md array, associate some - devices with it, and activate the array. - - As devices are added, they are checked to see if they con- - tain raid superblocks or filesystems. They are also check - to see if the variance in device size exceeds 1%. - - If any discrepancy is found, the array will not automati- - cally be run, though the presence of a ----rruunn can override - this caution. - - - The General Management options that are valid with --cre- - ate are: - - ----rruunn insist of running the array even if some devices - look like they might be in use. - - - ----rreeaaddoonnllyy - start the array readonly - not supported yet. - - -DDEETTAAIILL MMOODDEE - Usage: mmddaaddmm ----ddeettaaiill [----bbrriieeff] _d_e_v_i_c_e _._._. - - - This usage sill print out the details of the given array - including a list of component devices. To determine names - for the devices, mmddaaddmm searches //ddeevv for device files with - the right major and minor numbers. - - With ----bbrriieeff mmddaaddmm prints a single line that identifies - the level, number of disks, and UUID of the array. This - line is suitable for inclusion in //eettcc//mmddaaddmm..ccoonnff. - - -EEXXAAMMIINNEE MMOODDEE - Usage: mmddaaddmm ----eexxaammiinnee [----ssccaann] [----bbrriieeff] _d_e_v_i_c_e _._._. - - This usage will examine some block devices to see if that - have a valid RAID superblock on them. The information in - each valid raid superblock will be printed. - - If ----ssccaann is used, the no devices should be listed, and - the complete set of devices identified in the configura- - tion file are checked. ----ssccaann implies ----bbrriieeff but this - implication can be countered by specifying ----vveerrbboossee. - - With ----bbrriieeff mmddaaddmm will output an config file entry of - each distinct array that was found. This entry will list - the UUID, the raid level, and a list of the individual - devices on which a superblock for that array was found. - This output will by syntactically suitable for inclusion - in the configuration file, but should NNOOTT be used blindly. - Often the array description that you want in the configu- - ration file is much less specific than that given by mmddaaddmm - --BBss. For example, you normally do not want to list the - devices, particularly if they are SCSI devices. - - - -FFIILLEESS - //pprroocc//mmddssttaatt - If you're using the //pprroocc filesystem, //pprroocc//mmddssttaatt gives - you informations about md devices status. This file is - not currently used by mmddaaddmm. - - - //eettcc//mmddaaddmm..ccoonnff - The config file lists which devices may be scanned to see - if they contain MD super block, and gives identifying - information (e.g. UUID) about known MD arrays. See - mmddaaddmm..ccoonnff(5) for more details. - - - -TTOODDOO - Finish and document Follow mode. - - -SSEEEE AALLSSOO - For information on the various levels of RAID, check out: - - - http://ostenfeld.dk/~jakob/Software-RAID.HOWTO/ - - for new releases of the RAID driver check out: - - - ftp://ftp.kernel.org/pub/linux/kernel/peo- - ple/mingo/raid-patches - - or - - http://www.cse.unsw.edu.au/~neilb/patches/linux- - stable/ - - mmddaaddmm..ccoonnff(5), mmdd(4). - - _r_a_i_d_t_a_b(5), _r_a_i_d_0_r_u_n(8), _r_a_i_d_s_t_o_p(8), _m_k_r_a_i_d(8) - - - - mdadm(8) |