IBM SAS RAID controllers User Manual

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

IBM SAS RAID controllers Specifications

General

Brand	IBM
Model	SAS RAID controllers
Category	Power Supply
Language	English