1)#mdadm -l (or) #cat /proc/mdstat
Hardware RAID DETAILS
2)# cat /proc/mdstat | grep Raid
3)#cat /proc/drivers/cciss/cciss*
4)#cat /proc/scsi/scsi [ SCSI RAID Controller Details]
5)#lspci | grep raid #lshw #dmraid
Hardware RAID is very compatible one rather than Software RAID. Software Raid we won't get that much efficiency.
After Configure RAID. Raid Device path will be.
/dev/cciss/c0d0p1
C-Controller
D-Disk
P-Partition.
| RAID -3 | RIAD-5 | RAID-6 | |
| PARITY | Single Dedicated Parity Disk | Single Distributed Disk | Double Distributed Disk- |
Fault tolerance | No possibility for recovery | 1 – disk failure | 2-drive failure |
| Stripping | Stripe data at block level | Stripe at byte level |
Parity main purpose is error correction and fault tolerance.
| RAID-0 | RAID-1 | RAID-10 | RAID-5 | RAID-6 | |
| USAGE | Video Editing | Official Application | |||
| Required Min mum No of Disk | 1 | 2 | 4(two disk for mirroring) | 3(one Parity Disk) | 4(two Parity Disk) |
| Total Capacity 10G *n | 10G*2=20GB | 10G*2=10G Get 50% Disk Space | 10G*4=20 Get 50% Disk Space | 10G*6=50GB Reduce the One Disk Space | 10G*6=40GB Reduce the two Disk space. |
| Advantages | Improve Read & Write performance. Because while write into one disk at the same time we can write into another disk. [ audio-video Streaming Web Server] |
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