- Excel / Meridian Data Computer Drive User Manual

SECURSTOR ASTRA ES 93
RAID 1E
Advantages
Disadvantages
Implemented as a mirrored disk array
whose segments are RAID 0 disk
arrays
High I/O rates are achieved thanks to
multiple stripe segments
Can use an odd number of disks
Very high disk overhead - uses only
50% of total capacity
Recommended Applications for RAID 1E
• Imaging applications
• Database servers
• General fileserver
RAID 5
Advantages
Disadvantages
High Read data transaction rate
Medium Write data transaction rate
Good aggregate transfer rate
Disk failure has a medium impact on
throughput
Recommended Applications for RAID 5
• File and Application servers
• WWW, E-mail, and News servers
• Intranet servers
• Most versatile RAID level
RAID 6
Advantages
Disadvantages
High Read data transaction rate
Medium Write data transaction rate
Good aggregate transfer rate
Safest RAID level, except for RAID 60
High disk overhead – equivalent of two
drives used for parity
Slightly lower performance than RAID 5
Recommended Applications for RAID 6
• Accounting and Financial
• Database servers
• Any application requiring very high availability