Differences
This shows you the differences between two versions of the page.
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raidctl [2013/08/22 12:05] |
raidctl [2013/08/22 12:05] (current) |
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| + | ====== raidctl ====== | ||
| + | * [[Filesystems]] | ||
| + | * [[NetBSD]] | ||
| + | * [[disklabel]] | ||
| + | * [[fdisk]] | ||
| + | * [[newfs]] | ||
| + | * [[sysctl]] | ||
| + | |||
| + | ==== fdisk and disklabel === | ||
| + | |||
| + | Assuming the disk device is ''sd1'' | ||
| + | |||
| + | Add a blank partition list: | ||
| + | |||
| + | <code> | ||
| + | fdisk -f -a -0 sd1 | ||
| + | </code> | ||
| + | |||
| + | Create a RAID label: | ||
| + | |||
| + | <code> | ||
| + | disklabel -i -I /dev/rsd1d | ||
| + | </code> | ||
| + | ==== Initial Setup ==== | ||
| + | |||
| + | Setup first time: | ||
| + | |||
| + | <code> | ||
| + | raidctl -v -i /dev/raid5 -C /etc/raid5.conf | ||
| + | </code> | ||
| + | |||
| + | Display status: | ||
| + | |||
| + | <code> | ||
| + | raidctl -m /dev/raid5 | ||
| + | raidctl -s /dev/raid5 | ||
| + | raidctl -S /dev/raid5 | ||
| + | </code> | ||
| + | |||
| + | Check if parity is up to date: | ||
| + | |||
| + | <code> | ||
| + | raidctl -p /dev/raid5 | ||
| + | </code> | ||
| + | |||
| + | Initialize the parity if it is known to not be up-to-date (used when after a system crash): | ||
| + | |||
| + | <code> | ||
| + | raidctl -P /dev/raid5 | ||
| + | </code> | ||
| + | ==== Configuration File ==== | ||
| + | |||
| + | Each configuration file has four required sections, and two optional ones. They all begin with ''START'' and then the section name. | ||
| + | |||
| + | First is the ''array'' section, which defines the number of rows, columns, and spare disks. | ||
| + | |||
| + | A RAID5 array of 1 row, 4 disks and 0 spare disks | ||
| + | |||
| + | <code> | ||
| + | START array | ||
| + | 1 4 0 | ||
| + | </code> | ||
| + | |||
| + | The ''disks'' section specifies the actual devices in the RAID array: | ||
| + | |||
| + | <code> | ||
| + | START disks | ||
| + | /dev/sd1a | ||
| + | /dev/sd2a | ||
| + | /dev/sd3a | ||
| + | /dev/sd4a | ||
| + | </code> | ||
| + | |||
| + | The ''layout'' section defines sectors per stripe unit, stripe units per parity unit, stripe units per reconstruction unit, and the parity configuration to use. | ||
| + | |||
| + | This example is from the man page, for RAID5: | ||
| + | |||
| + | <code> | ||
| + | START layout | ||
| + | # sectPerSU SUsPerParityUnit SUsPerReconUnit RAID_level | ||
| + | 32 1 1 5 | ||
| + | </code> | ||
| + | |||
| + | Final required section is ''queue''. Again, using the man page as a reference: | ||
| + | |||
| + | <code> | ||
| + | START queue | ||
| + | fifo 100 | ||
| + | </code> | ||
