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RAID 5

Index | Features | RAID 0 | RAID 1 | RAID 1+0 | RAID 2 | RAID 3 | RAID 4 | RAID 5 | RAID 5+0 | RAID 6 |


RAID 5 is the most popular RAID technology in use today. It uses a technique that avoids the concentration of I/O on a dedicated parity disk, that occurs with RAID 4.
Although RAID 5 divides the data and creates parity information similar to RAID 4, unlike RAID 4 the parity data is written separately across multiple disks.

"Write penalty" still occurs as existing data must be pre-read before update and parity data has to be updated after the data is written.

However, RAID 5 enables multiple write orders to be implemented concurrently because updated parity data is dispersed across the multiple disks. This feature ensures higher performance compared with RAID 4.

Furthermore, ETERNUS DX8000 series and ETERNUS8000 are able to deploy disk drives where RAID6 and 5 arrays are deployed across separate drive enclosures (DE) for improved reliability. (Learn more)

Flash demonstrations

RAID 5 supported:

Disk Storage Systems ETERNUS DX60 S3
ETERNUS DX100 S3/DX200 S3
ETERNUS DX500 S3/DX600 S3
ETERNUS DX8700 S3/DX8900 S3
ETERNUS DX60/DX60 S2
ETERNUS DX80/DX80 S2
ETERNUS DX90/DX90 S2
ETERNUS DX400 series/DX400 S2 series
ETERNUS DX8000 series/DX8700 S2
ETERNUS2000, ETERNUS4000, ETERNUS8000
All Flash Arrays ETERNUS DX200F