HP Surestore Disk Array 12h - And FC60 Advanced User's Manual page 56
Hp surestore e disk array fc60 - (english) advanced user's guide
Hide thumbs
Also See for Surestore Disk Array 12h - And FC60:
- Service manual (746 pages) ,
- User manual (310 pages) ,
- System administrator manual (279 pages)
Table of Contents
Advertisement
Figure 22
LUN
RAID 5
With its individual access characteristics, RAID 5 provides high read throughput for small
block-size requests (2
K
disk in the LUN. During a write I/O, the disk array must perform four individual operations,
which affects the write performance of a RAID 5 LUN. For each write, the disk array must
perform the following steps:
1.
Read the existing user data from the disks.
2.
Read the corresponding parity information.
3.
Write the new user data.
4.
Calculate and write the new parity information.
Write caching can significantly improve the write performance of a RAID 5 LUN. RAID 5 is
good for parallel processing (multi-tasking) applications and environments. The
performance of a RAID 5 LUN is best when the maximum number of disks (six) is used.
Disk Array High Availability Features
56
B to 8
B) by allowing simultaneous read operations from each
K
Advertisement
Table of Contents
Troubleshooting
