Table of Contents
Advertisement
Chapter 7: Technology Background
RAID 5 – Block Striping with Distributed Parity
RAID 5 is similar to RAID 3 as described above except that the parity data is
distributed across the disk drives along with the data blocks. In each case, the
parity data is stored on a different disk than its corresponding data block.
RAID 5 makes efficient use of hard drives and is the most versatile RAID Level. It
works well for file, database, application and web servers.
Distributed Parity
Data
Blocks
Disk Drives
Figure 4. RAID 5 Stripes all drives with data and parity information
The capacity of a RAID 5 logical drive is the smallest disk drive size multiplied by
the number of disk drives, less one. Hence, a RAID 5 logical drive with four 100
GB disk drives will have a capacity of 300 GB. A logical drive with two 120 GB
disk drives and one 100 GB disk drive will have a capacity of 200 GB.
RAID 5 logical drives on VTrak consist of 3 to 15 disk drives.
193
Advertisement
Table of Contents
Need help?
Do you have a question about the VTRAK 15200 and is the answer not in the manual?
Questions and answers