IBM System x3750 M4 Product Manual

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IBM System x3750 M4 Product Manual Manual pdf 13 page image

IBM System x3750 M4 13Internal storageThe server can support up to 16x 2.5-inch drives, up to 32x 1.8-inch drives, or a combination of both2.5-inch and 1.8-inch hot-swap drives, using the supported SAS/SATA backplane configurations. Theserver supports 2.5-inch hot-swap SAS or hot-swap SATA hard disk drives, 2.5-inch hot-swap SATAsolid-state drives, or 1.8-inch hot-swap SATA solid-state drives. You can mix drives in the same server aslong as you do not mix drives on the same array.BackplanesIBM System x3750 M4 server supports a variety of internal storage configurations based on four differentbackplanes:4-drive backplane for 2.5-inch drives: Up to four backplanes can be installed, each requiring one SASconnection to a supported controller. One RAID controller can connect to two of these backplanes.8-drive backplane for 2.5-inch drives: Up to two backplanes can be installed, each requiring two SASconnections. One RAID controller per backplane.8-drive backplane with a SAS expander for 2.5-inch drives: Use in conjunction with the other 2.5-inchdrive backplanes (8-drive or one 4-drive or two 4-drive backplanes) which will result in being able toconnect up to 16 2.5-inch drive bays to the one RAID controller.8-drive backplane for 1.8-inch solid-state drives (eXFlash Pack): Up to four backplanes can beinstalled, each requiring two SAS connections. One RAID controller per backplane. Cannot beconnected to the 8-drive backplane with a SAS expander.When building drive backplane configurations, all 1.8-inch SSD drive backplanes must be installed to theright of all 2.5-inch HDD or 2.5-inch SSD drive backplanes (when looking at the front of the server). Everyfour drives uses a SAS signal cable except when the 8-drive backplane with SAS expander is used. Whenthe 8-drive backplane with SAS expander is used, the other backplanes connect to the SAS expanderbackplane with the supplied cables and then the SAS expander backplane is connected to the singleRAID controller with two cables. All backplane options include the necessary cables.See theIBM System x3750 M4 Installation and Service Guide for a description of all supported backplanecombinations.Standard models (all models except A2x) ship with at least one backplane; see Table 2 for details. Thefollowing table shows the backplane options that are available for a x3750 M4 server.Table 6. Internal storage expansion optionsPart number FeaturecodeName Maximumsupported88Y7418 A2A3 IBM 4x 2.5-in. HS SAS HDD Backplane 488Y7419 A2A4 IBM 8x 2.5-in. HS SAS HDD Backplane 288Y7421 A2A2 IBM 8x 2.5-in. HS SAS HDD Backplanewith RAID expansion (SAS expander)1*88Y7422 A2XR IBM eXFlash 8x 1.8-in. HS SAS SSD Backplane 4* Only one backplane with SAS expander (88Y7421) can be installed in a server and can be used connected to asingle 8-drive backplane (88Y7419), a single 4-drive backplane (88Y7418), or two 4-drive backplanes (88Y7418).The SAS expander backplane cannot be used with the eXFlash backplane.