Table 2. PCIe SAS RAID controller card comparison (continued)
Features
2B4C
574E
57B3
57B7
Auxiliary write cache (AWC)
support
No
No
No
Yes
Dual storage IOA
configuration
Yes
Yes
No
No
Requires dual storage IOA
configuration
Yes
Yes
No
No
1
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, or use solid-state drives (SSDs) where they are supported to improve write performance.
Table 3. PCIe SAS RAID controller card comparison
Features
57C7
57CB
57CD
57CF
Description
PCI Express x8 Planar 3 Gb
SAS adapter (disk/media
backplane)
PCIe x4 Planar 3 Gb SAS
RAID adapter
PCIe SAS RAID and SSD
adapter 3 Gb x8
PCI Express x8 planar 3 Gb
SAS RAID adapter (with 175
MB Cache RAID - Dual IOA
Enablement card)
Form factor
Planar
Planar cache enablement
Double-wide PCIe x8 with
1 to 4 integrated SSDs
Planar and Enablement card
Physical links
8
8 (two 2x wide ports to
shared SAS drives and one
2x wide port to 2B4F, one
physical link to DVD, and
optionally one physical link
to tape drive)
4 (one direct SAS physical
link to each integrated
SSD)
8
RAID levels supported
RAID 5
1
, RAID 6
1
, system
mirroring
RAID 5, RAID 6, system
mirroring
RAID 5, RAID 6, system
mirroring
RAID 5, RAID 6, system
mirroring
Write cache size
175 MB
175 MB
Read cache size
Cache battery pack technology
Lithium ion
Lithium ion
Cache battery concurrent
maintenance
No
No
No
Yes
Cache data present LED
No
Yes
No
Yes
Removable cache card
No
No
No
No
Auxiliary write cache (AWC)
support
No
No
No
No
Dual storage IOA
configuration
No
Yes
No
Yes
Requires dual storage IOA
configuration
No
Yes
No
Yes
520-byte virtual disk support
No
No
No
No
1
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, or use solid-state drives (SSDs) where they are supported to improve write performance.
Adapter graphics
View the SAS RAID controllers.
6
SAS RAID controllers for IBM i
Summary of Contents for SAS RAID controllers
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