IBM SAS RAID 5, Руководство пользователя

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Related concepts
Chapter 5, “Dual storage IOA configurations,” on page 21
You can increase availability using a dual storage I/O adapter (IOA) configuration to connect multiple
controllers to a common set of disk expansion drawers and the included disks and disk arrays.
“Dual storage IOA functions” on page 22
Consider these factors when using dual storage I/O adapter (IOA) functions.
PCIe SAS RAID card comparison
Use the table in this topic to compare the features of a PCI Express (PCIe) SAS RAID cards for IBM i.
There are also images of adapters for you to view.
Table 2. PCIe SAS RAID controller card comparison
Features 57B7 57B3 574E
Description PCIe x1 Auxiliary Cache
adapter PCIe x8 Ext Dual-x4 3 Gb
SAS adapter PCIe x8 Ext Dual-x4 3 Gb
SAS RAID adapter
Form factor Planar Auxiliary Cache PCIe x8 PCIe x8
Physical links 2 8 (two mini SAS 4x
connectors) 8 (two mini SAS 4x
connectors)
RAID levels supported RAID 5
1
, RAID 6
1
, system
mirroring
RAID 5, RAID 6, system
mirroring
Write cache size 175 MB 380 MB
Read cache size
Cache battery pack
technology Lithium ion Lithium ion
Cache battery concurrent
maintenance Yes No Yes
Cache data present LED Yes No Yes
Removable cache card No No Yes
Figure 3. CCIN 572F PCI-X266 Ext Tri-x4 3 Gb SAS RAID adapter and CCIN 575C PCI-X266 Auxiliary Cache adapter
6
SAS RAID controllers for IBM i