Dell PowerEdge RAID Controller 6i User Manual

Page 22

About PERC 6 and CERC 6i Controllers

Cache
Memory

256-MB
DDRII cache
memory size

Optional 512-
MB DIMM

256-MB DDRII
cache memory
size

128-MB
DDRII
cache
memory
size

Cache
Function

Write-Back,
Write-Throug
h, Adaptive
Read Ahead,
No-Read
Ahead,
Read Ahead

Write-Back,
Write-Through,
Adaptive
Read Ahead,
No-Read Ahead,
Read Ahead

Write-Back,
Write-
Through,
Adaptive
Read
Ahead,
No-Read
Ahead,
Read Ahead

Maximum
Number of
Spans per
Disk Group

Up to 8 arrays

N/A

Maximum
Number of
Virtual Disks
per Disk
Group

Up to 16
virtual disks
per disk group
for non-
spanned RAID
levels: 0, 1, 5,
and 6.

One virtual
disk per disk
group for
spanned RAID
levels: 10, 50,
and 60.

Up to 16 virtual
disks per disk
group for non-
spanned RAID
levels: 0, 1, 5,
and 6.

One virtual disk
per disk group
for spanned
RAID levels: 10,
50, and 60.

Up to 16 virtual
disks per disk
group for non-
spanned RAID
levels: 0, 1, 5,
and 6.

One virtual disk
per disk group
for spanned
RAID levels: 10,
50, and 60.

Up to 16
virtual disks
per disk
group

RAID 0=16

RAID 1=16

Multiple
Virtual Disks
per
Controller

Up to 64
virtual disks
per controller

Up to 64 virtual
disks per
controller

Up to 64
virtual disks
per
controller

Table 3-1.

PERC 6 and CERC 6/i Controller Comparisons (continued)

Specification

PERC 6/E
Adapter

PERC 6/i Adapter

PERC 6/i
Integrated

CERC 6/i
Integrated

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