Softraid linux full#
Softraid linux software#

While RAID metadata is stored in each component drive, you should still save your RAID configuration for future use. One way to do this is by running grub-install /dev/sda.

This means that if you are using /dev/sda1 as a member of the array /dev/md0 and your primary HDD/SSD is set as BIOS boot option, you must choose /dev/sda for the bootloader code. IMPORTANT NOTE: If you want to boot from a RAID device, place the bootloader code at the start of the physical drive that will be used as the underlying component of the RAID device. /dev/sda1, /dev/sdb1 - each component device's path.-level=- can contain any of the following:.-n 2 Â - the total number of drives, which can be classified as spare, active, or missing a â€˜missingâ€™ drive requires the additional option -f to work.Mdadm -create /dev/md0 -n 2 -level=1 /dev/sda1 /dev/sdb1

Softraid linux software#

What you need to do is create a partition in the drives (using fdisk or Parted) with partition type set to â€˜ fd,â€™ the Linux Software RAID auto-detect.Īfter creating a partition in each relevant drive (sda1, sdb1), you can now create the array:

Softraid linux full#

You can use full drives as parts of a RAID array but this should be avoided if you want to make the drives bootable. Also, if a device needs to be removed from the array, remember to mark it first as â€˜faultyâ€™ before you remove it. The RAID layer just avoids reading/writing them. Note that faulty disks still appear and behave as members of the array. If no spare disk is available, then the array runs in 'degraded' mode. Your system can now run for some time even with a faulty disk as the spare takes its place. Once a device failure is detected, that device is marked as â€˜faultyâ€™ and the set starts reconstruction immediately on the first hot spare available. In a RAID implementation, there are spare disks or hot spares that do not take part in the RAID set until one of the active disks fail. They can be 'built' from a number of other block devices. Software RAID devices should be seen as ordinary disks or disk partitions. You can place a file system on a RAID device, just like on any other block device. Note that the RAID layer does not touch the file system layer at all. Linux Software RAID is a block device that can work on most other devicesâ€”SATA, USB, IDE, SCSI, or a combination of these.