Failed, offline, or missing devices would be indicated with an underscore, as in or. Each U corresponds to a constituent device of the RAID. This is determined automatically, and rarely significant. The number in brackets following each device indicate the number of that device in the RAID.
#Softraid software software
All Unitrends software RAIDs as of this writing are composed of exactly two other devices. These can be physical devices (starting with sd) or other RAID devices (starting with md).
The items in the format sdXN describe the devices which compose the RAID. The raid1/raid0 keyword describes the type of this RAID. All devices should be active in a normally functioning DPU. The active keyword describes the state of the RAID device. RAID device : state type device device… SIZE blocks Įach of these is a virtual device which is either used directly, or used as a constituent of another RAID device. Gathering information about the RAID If a DPU is equipped with a software RAID, its configuration and status is reported in real time by viewing the contents of the ~]# cat /proc/mdstat Personalities : md5 : active raid0 md000832 blocks 64k chunks md1 : active raid1 sdb3 sda3 4008128 blocks md3 : active raid1 sdb5 sda5 1445873984 blocks md2 : active raid1 sdd1 sdc1 20008832 blocks md4 : active raid1 sdd2 sdc2 1445126976 blocks md0 : active raid1 sdb2 sda2 15004608 blocks unused devices:Įach mdX entry refers to an active software RAID device, and takes the following form: 
In these systems, software RAID is used to stripe the operating system drives, and traditional hardware RAID is used for the storage partition. Software RAIDs are also used to complement 3ware RAIDs on the following systems: In these systems, software RAID is used on both the operating system and storage partitions. The Linux Software RAID system is used in place of 3ware hardware-based RAID controllers in the following DPUs:
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