Users Guide

Read, Write, Cache And Disk Cache Policy
Supported By PERC Hardware Controllers
Table 43. Read, Write, and Cache Policy Supported by PERC Hardware Controllers
Read, Write,
and Cache
Policy
PERC
H730P
Adapter/
Mini
Monolithi
c/Mini
Blades/
Slim
PERC
H730
Adapt
er/
Mini
Monoli
thic/
Mini
Blades
PERC
H740P
Adapte
r/ Mini
Monolit
hic
PERC
H330
Adapter/
Mini
Monolithi
c/Mini
Blades/
Embedde
d
PERC
H830
Adapte
r
PERC
H840
Adapte
r
PERC
FD33xD
/
FD33xS
PERC
H730P
MX
PERC
H745P
MX
PERC
H745P
Front /
Adapter
PERC
H345
Front /
Adapter
Cache
settings
Yes Yes Yes No Yes Yes Yes Yes Yes Yes Yes
Read Policy Yes Yes Yes No Yes Yes Yes Yes Yes Yes Yes
Read Ahead
(Enabled)
Yes Yes Yes No Yes Yes Yes Yes Yes Yes Yes
Adaptive
Read Ahead
No No No No No No No No No No No
No Read
Ahead
(Disabled)
Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes
Write Policy Yes Yes Yes No Yes Yes Yes Yes Yes Yes Yes
Write Back
(Enabled)
Yes Yes Yes No Yes Yes Yes Yes Yes Yes Yes
Write
Through
(Disabled)
Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes
Force Write
Back
(Enabled
Always)
Yes Yes Yes No Yes Yes Yes Yes Yes Yes Yes
Write Cache
Enabled
Protected
No No No No No No No No No No No
Cache Policy No No No No No No No No No No No
Disk Cache
Policy
Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes
Cache I/O No No No No No No No No No No No
Direct I/O No No No No No No No No No No No
Supported Features On The PERC Software RAID
Controllers
This section identifies the controller-supported features and whether or not an enclosure can be attached to the controller. The Software
RAID controller includes PERC S150 on R6525 and C6525 platforms.
• Controller Tasks
• Physical Disk Tasks
154
Supported Features