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| (30 dazwischenliegende Versionen desselben Benutzers werden nicht angezeigt) |
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| '''Howto'''
| | *[[Raid]] |
| | | *[[Mdadm Grundlagen]] |
| ==Einrichten==
| | *[[Mdadm Howto]] |
| ===Installation===
| | *[[Aufgaben zu mdadm]] |
| *apt-get install mdadm
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| ===Raid 0===
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| *mdadm -C /dev/md0 -l 0 -n 2 /dev/vda5 /dev/vda6 | |
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| ===Raid 1===
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| mdadm -C /dev/md0 -l 1 -n 2 /dev/sdb1 /dev/sdc1
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| ===Raid 1 mit fehlender Platte===
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| mdadm -C /dev/md2 -l 1 -n 2 missing /dev/sdb3
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| ===Raid 5===
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| mdadm -C /dev/md5 -l 1 -n 2 /dev/sdb1 /dev/sdc1
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| ===Raid 10===
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| mdadm -C /dev/md0 -l 10 -n 4 /dev/sda1 /dev/sdb1 /dev/sdc1 /dev/sdd1
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| ==Kontrolle==
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| cat /proc/mdstat
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| Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] [multipath]
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| md2 : active raid1 sdb3[1]
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| 987904 blocks [2/1] [_U]
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|
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| md1 : active raid5 sdd2[2] sdc2[1] sdb2[0]
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| 1975808 blocks level 5, 64k chunk, algorithm 2 [3/3] [UUU]
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|
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| md0 : active raid1 sdc1[1] sdb1[0]
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| 987840 blocks [2/2] [UU]
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| ==mdadm.conf erstellen==
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| */usr/share/mdadm/mkconf > /etc/mdadm/mdadm.conf
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| ==alternative==
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| (Braucht man nicht, wenn die Konfiguration im persistent superblock ist)
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| cd /etc/mdadm
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| echo 'DEVICE /dev/hd*[0-9] /dev/sd*[0-9]' > mdadm.conf
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| mdadm --detail --scan >> mdadm.conf
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| | |
| ==Bootvorgang==
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| mdadm -A /dev/md0 /dev/sdb1 /dev/sdc10
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| mdadm -A /dev/md1 /dev/sdb2 /dev/sdc2 /dev/sdd2
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| | |
| Alternativ kann man die RAID*-Funktionen auch fest in den Kernel einbinden oder die Module in die Ramdisk einbinden,
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| dann werden bei 0xFD Partitionstyp die Partitionen automatisch zu md-Devices assembliert und gestartet.
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| | |
| ==Partition hinzufügen==
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| mdadm /dev/md2 -a /dev/sdc3
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| | |
| ==Partition fehlerhaft setzen==
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| mdadm /dev/md2 -f /dev/sdb3
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| ==Partition entfernen==
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| mdadm /dev/md2 -r /dev/sdb3
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| ==Raid stoppen==
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| mdadm -S /dev/md0
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| ==Raid Info==
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| mdadm -D /dev/md0
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| /dev/md0:
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| Version : 00.90.03
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| Creation Time : Wed Apr 15 13:42:42 2009
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| Raid Level : raid1
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| Array Size : 987840 (964.85 MiB 1011.55 MB)
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| Device Size : 987840 (964.85 MiB 1011.55 MB)
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| Raid Devices : 2
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| Total Devices : 2
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| Preferred Minor : 0
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| Persistence : Superblock is persistent
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|
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| Update Time : Wed Apr 15 13:59:29 2009
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| State : clean
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| Active Devices : 2
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| Working Devices : 2
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| Failed Devices : 0
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| Spare Devices : 0
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|
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| UUID : 83eeb8b3:5bd709f3:0b079abc:da6fc34e
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| Events : 0.2
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|
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| Number Major Minor RaidDevice State
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| 0 8 17 0 active sync /dev/sdb1
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| 1 8 33 1 active sync /dev/sdc1
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| | |
| ==Superblock untersuchen==
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| mdadm -E /dev/sdb1
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| /dev/sdb1:
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| Magic : a92b4efc
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| Version : 00.90.03
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| UUID : 83eeb8b3:5bd709f3:0b079abc:da6fc34e
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| Creation Time : Wed Apr 15 13:42:42 2009
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| Raid Level : raid1
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| Raid Devices : 2
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| Total Devices : 2
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| Preferred Minor : 0
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|
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| Update Time : Wed Apr 15 13:59:29 2009
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| State : clean
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| Active Devices : 2
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| Working Devices : 2
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| Failed Devices : 0
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| Spare Devices : 0
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| Checksum : 243179c - correct
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| Events : 0.2
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|
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|
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| Number Major Minor RaidDevice State
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| this 0 8 17 0 active sync /dev/sdb1
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|
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| 0 0 8 17 0 active sync /dev/sdb1
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| 1 1 8 33 1 active sync /dev/sdc1
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| | |
| ==Scanne alle Partitionen und Devices und baue sie zu md0 sofern im Superblock 0 aufgeführt==
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| mdadm -Ac partitions -m 0 /dev/md0
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| ==Scanne alle Partitionen und Devices und baue sie zu md1 sofern im Superblock 1 aufgeführt==
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| mdadm -Ac partitions -m 1 /dev/md1
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| ==Konfiguration updaten==
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| mdadm -Ds > /etc/mdadm.conf
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| ==Superblock löschen==
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| mdadm --zero-superblock /dev/sda11
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| ==Partition anschalten==
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| mdadm --run /dev/sd11
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| | |
| ==Partition schreibbar setzen==
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| mdadm --readwrite /dev/sd11
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| =Synchronisationsgeschwindigkeit=
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| anzeigen
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| cat /proc/sys/dev/raid/speed_limit_max
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| 200000
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| cat /proc/sys/dev/raid/speed_limit_min
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| 1000
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| erhöhen
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| echo 50000 > /proc/sys/dev/raid/speed_limit_min
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| | |
| =SATA RAID=
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| *https://wiki.debian.org/DebianInstaller/SataRaid
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