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Software RAID on Linux

919 bytes added, 15:47, 3 May 2019
/* Software RAID on 3.x Linux */
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Software RAID is performed via the Linux kernel.  No RAID controller is required on the computer.  If the computer has a Linux compatible RAID controller then hardware RAID can be used.  Hardware RAID is not discussed here.[[Software RAID]] is performed via the Linux kernel.  No RAID controller is required on the computer.  If the computer has a Linux compatible RAID controller then hardware RAID can be used.  [[Hardware RAID]] is not discussed here. mdadm is a Linux utility used to manage and monitor software RAID devices. It is used in modern GNU/Linux distributions in place of older software RAID utilities such as raidtools2 or raidtools.  === the /boot filesystem ===In the past the /boot filesystem must be used either without md support, or else with RAID1.  With modern kernels the it is possible to load the MD support as a kernel module through the initramfs mechanism. This approach allows the /boot filesystem to be inside any RAID system without the need of a complex manual configuration. * In the past you couldn't put /boot inside the RAID array, now you can.So you have a couple options in order to have a setup where each drive can be bootable.  One is to have a /boot partition on each drive, or the other involves having /boot within a RAID array.=== Mdadm ===The mdadm utility can be used to create and manage storage arrays. 
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