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Table 1. PCI-X SAS RAID controller card comparison
Features
572A
Description
PCI-X 266 Ext
Dual-x4 3 Gb SAS
adapter
Form factor
Low profile 64 bit
PCI-X
Physical links
8 (two mini SAS 4x
connectors)
RAID levels
RAID 5
supported
system mirroring
Write cache size
Read cache size
Cache battery pack
technology
Cache battery
No
concurrent
maintenance
Cache data present
No
LED
Removable cache card No
Auxiliary write cache
No
(AWC) support
Dual storage IOA
No
configuration
Requires dual storage
No
IOA configuration
1. Some systems provide an external mini SAS 4x connector from the integrated backplane controller.
2. The controller contains battery-backed cache, but the battery power is supplied by the 57B7 controller through
the backplane connections.
3. The write performance of RAID 5 and RAID 6 might be poor on adapters that do not provide write cache.
Consider using an adapter that provides write cache when using RAID 5 or RAID 6.
4. The cache battery pack for both adapters is contained in a single battery field-replaceable Unit (FRU), which is
physically located on the 575C Auxiliary Cache card.
Adapter graphics
View the SAS RAID controllers.
4
SAS RAID controllers for IBM i
572C
PCI-X 266 planar 3
Gb SAS adapter
Planar integrated
1
8
3
3
, RAID 6
,
System mirroring
No
No
No
No
No
No
572F and 575C
57B8
PCI-X 266 Ext Tri-x4 3
PCI-X 266 planar 3
Gb SAS RAID
Gb SAS RAID
adapter
adapter
Long 64 bit PCI-X,
Planar RAID
double-wide card set
enablement
1
12 (bottom 3 mini
8
SAS 4x connectors)
and 2 (top mini SAS
4x connector for high
availability only)
RAID 5, RAID 6,
RAID 5, RAID 6,
system mirroring
system mirroring
Up to 1.5 Gb
175 MB
(compressed)
Up to 1.6 Gb
(compressed)
Lithium ion
Not applicable
4
Yes
Not applicable
No
No
No
No
Yes
Yes
Yes
No
No
No
2
2
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