IBM System x3550 M4 23Controllers for internal storageThe following table lists the RAID controllers and the additional options used for the internal disk storageof the x3550 M4 server. The controllers are installed into a dedicated PCIe slot.Table 8. RAID controllers and HBAs for internal storage (Part 1: 6 Gbps SAS/SATA)PartnumberFeaturecodeDescription MaximumsupportedStandard modelswhere used6 Gb Controllers81Y4492 A1XL ServeRAID H1110 SAS/SATA Controller 1 A2x, C4x, A3x, C5x81Y4448 A1MZ ServeRAID M1115 SAS/SATA Controller 1 B2x, C2x, B3x, C3x81Y4481 A347 ServeRAID M5110 SAS/SATA Controller 1 D2x, F2x, G2x, 52x,H2x, 62x, J2x, L2x,32x, DDx, M2x, 23x,33x, 43x, 53x, 73x,83x, D3x, F3x, G3x,H3x, J3x, L3x, M3x46M0912 3876 IBM 6Gb Performance Optimized HBA 1 -46C8988 A3MW N2115 SAS/SATA HBA for IBM System x 1 -Features on Demand upgrades81Y4542 A1X1 ServeRAID M1100 Series Zero Cache/RAID5 Upgrade1 -81Y4544 A1X2 ServeRAID M5100 Series Zero Cache/RAID5 Upgrade1 -81Y4546 A1X3 ServeRAID M5100 Series RAID 6 Upgrade 1† -90Y4273 A2MC ServeRAID M5100 Series PerformanceAccelerator1 -90Y4318 A2MD ServeRAID M5100 Series SSD CachingEnabler1 -Hardware upgrades81Y4484 A1J3 ServeRAID M5100 Series 512MBCache/RAID 5 Upgrade1 DDx81Y4487 A1J4 ServeRAID M5100 Series 512MBFlash/RAID 5 Upgrade1 D2x, F2x, D3x, F3x81Y4559 A1WY ServeRAID M5100 Series 1GB Flash/RAID5 Upgrade1 G2x, H2x, J2x, L2x,52x, 62x, 53x, 73x,83x, G3x, H3x, J3x,L3x47C8670 A4G6 ServeRAID M5100 Series 2GB Flash/RAID5 Upgrade - hidden1 -81Y4508 A22E ServeRAID M5100 Series Battery Kit 1* DDx* The ServeRAID M5100 Series Battery Kit (81Y4508) is only supported with ServeRAID M5100 Series 512MBCache/RAID 5 Upgrade (81Y4484).† The ServeRAID M5100 Series RAID 6 Upgrade (81Y4546) requires 512 MB or 1 GB cache upgrades.