![background image](http://html.mh-extra.com/html/promise-technology/pegasus3-r4/pegasus3-r4_product-manual_1617248181.webp)
168
Promise
Technology
Pegasus3 R4/R6/R8
A RAID 6 on Pegasus R6 consists of four to six physical drives.
Recommended Applications for RAID 6:
•
Accounting and Financial
•
Database servers
•
Any application requiring very high availability
RAID 10 – Stripe
Stripe combines both of the RAID 1 and RAID 0 logical drive types. RAID
10 can increase performance by reading and writing data in parallel or striping, and duplicating the
data, or mirroring.
PROMISE implements RAID 10 by creating a data stripe over one pair of disk drives, then mirroring the
stripe over a second pair of disk drives. Some applications refer to this method as RAID 0+1.
PROMISE RAID 10 starts with a data stripe, then mirrors it
Advantages
Disadvantages
•
High Read data transaction rate
•
Medium Write data transaction rate
•
Good aggregate transfer rate
•
High disk overhead – equivalent of two
drives used for parity
•
Slightly lower performance than RAID 5
1. Data Stripe
2. Data Mirror
Disk Drives
Summary of Contents for Pegasus3 R4
Page 4: ...iv Promise Technology Pegasus3 R4 R6 R8 VCCI KCC FCC ...
Page 5: ...v About this guide Pegasus3 Product Manual WARNING WARNING WARNING WARNING ...
Page 80: ...67 Managing the Pegasus3 Pegasus3 Product Manual Controller Settings ...
Page 207: ...194 Promise Technology Pegasus3 R4 R6 R8 View NVRAM Events ...