Power Systems SAS RAID controllers for AIX Power Systems SAS RAID controllers for AIX Note Before using this information and the product it supports, read the information in “Notices,” on page 137, “Safety notices” on page vii, the IBM Systems Safety Notices manual, G229-9054, and the IBM Environmental Notices and User Guide, Z125–5823. This edition applies to IBM Power Systems™ servers that contain the POWER6™ processor and to all associated models. © Copyright International Business Machines Corporation 2007, 2009. US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. Contents Safety notices ................................vii Chapter 1. SAS RAID controllers for AIX overview .................1 Feature comparison of SAS RAID cards ..........................1 PCI-X SAS RAID card comparison ...........................1 PCIe SAS RAID card comparison ...........................5 SAS architecture ..................................8 Disk arrays ...................................10 Supported RAID levels ..............................12 RAID 0 ...................................12 RAID 5 ...................................13 RAID 6 ...................................13 RAID 10 ..................................14 Disk array capacities ...............................15 RAID level summary ...............................15 Stripe-unit size .................................16 Valid states for hdisks and pdisks ...........................16 States for disk arrays (hdisks) ...........................16 States for physical disks (pdisks) ..........................17 pdisk descriptions ...............................17 Auxiliary write cache ...............................17 Auxiliary write cache adapter ...........................17 Installing the auxiliary write cache .........................19 Viewing link status information ..........................20 Chapter 2. Controller software .........................23 Controller software verification .............................23 Chapter 3. Common controller and disk array management tasks ..........25 Using the Disk Array Manager .............................25 Preparing disks for use in SAS disk arrays .........................26 Creating a disk array ................................26 Migrating an existing disk array to a new RAID level .....................27 Viewing the disk array configuration ...........................29 Deleting a disk array ................................30 Adding disks to an existing disk array ..........................31 Using hot spare disks ................................32 Creating hot spare disks ..............................32 Deleting hot spare disks ..............................32 Viewing IBM SAS disk array settings ...........................32 Viewing IBM SAS pdisk settings ............................33 Viewing pdisk vital product data ............................34 Viewing controller SAS addresses ............................34 Controller SAS address attributes ............................34 AIX command-line interface ..............................35 Chapter 4. Multi-initiator and high availability ...................37 Possible HA configurations ..............................37 Controller functions ................................39 Controller function attributes .............................41 Viewing HA controller attributes ............................42 HA cabling considerations ..............................42 HA performance considerations ............................43 HA access optimization ...............................43 © Copyright IBM Corp. 2007, 2009 iii HA access characteristics within List SAS Disk Array Configuration ................46 Configuration and serviceability considerations for HA RAID configurations .............47 Installing high availability ..............................48 Installing an HA single-system RAID configuration .....................48 Installing an HA two-system RAID configuration......................51 Functions requiring special attention in an HA two-system RAID configuration ...........55 Installing an HA two-system JBOD configuration ......................55 Chapter 5. SAS RAID controller maintenance ...................59 Updating the SAS RAID controller microcode ........................59 Changing pdisks to hdisks ..............................60 Rechargeable battery maintenance ............................60 Displaying rechargeable battery information .......................60 Error state ...................................62 Forcing a rechargeable battery error ..........................62 Replacing a battery pack ...............................63 Replacing a 572B nonconcurrent maintainable battery pack ..................63 Replacing a 57B7 concurrent maintainable battery pack....................65 Replacing a 574E concurrent maintainable battery pack....................67 Replacing a 572F/575C card set concurrent maintainable battery pack ...............68 Separating the 572F/575C card set and moving the cache directory card ...............69 Replacing the cache directory card............................73 Replacing pdisks .................................75 Viewing SAS fabric path information ...........................76 Example: Using SAS fabric path information ........................77 Chapter 6. Problem determination and recovery ..................83 SAS resource locations................................83 Showing physical resource attributes ...........................84 Disk array problem identification ............................85 Service request numbers ...............................86 Controller maintenance analysis procedures ........................88 Examining the hardware error log ...........................88 MAP 3100 ...................................89 MAP3110...................................89 MAP3111...................................91 MAP3112...................................92 MAP3113...................................94 MAP 3120 ...................................96 MAP 3121 ...................................99 MAP 3130 ...................................99 MAP 3131 ..................................101 MAP 3132 ..................................105 MAP 3133 ..................................107 MAP 3134 ..................................107 MAP 3135 ..................................111 MAP 3140 ..................................111 MAP 3141 ..................................112 MAP 3142 ..................................113 MAP 3143 ..................................114 MAP 3144 ..................................115 MAP 3145 ..................................119 MAP 3146 ..................................120 MAP 3147 ..................................123 MAP 3148 ..................................124 MAP 3149 ..................................125 MAP 3150 ..................................125 MAP 3152 ..................................128 MAP 3153 ..................................131 MAP 3190 ..................................134 iv Finding a service request number from an existing AIX error log ................135 Appendix. Notices ..............................137 Trademarks ...................................138 Electronic emission notices ..............................138 Class A Notices.................................138 Terms and conditions................................142 Contents v vi Safety notices Safety notices may be printed throughout this guide: v DANGER notices call attention to a situation that is potentially lethal or extremely hazardous to people. v CAUTION notices call attention to a situation that is potentially hazardous to people because of some existing condition. v Attention notices call attention to the possibility of damage to a program, device, system, or data. World Trade safety information Several countries require the safety information contained in product publications to be presented in their national languages. If this requirement applies to your country, a safety information booklet is included in the publications package shipped with the product. The booklet contains the safety information in your national language with references to the U.S. English source. Before using a U.S. English publication to install, operate, or service this product, you must first become familiar with the related safety information in the booklet. You should also refer to the booklet any time you do not clearly understand any safety information in the U.S. English publications. German safety information Das Produkt ist nicht für den Einsatz an Bildschirmarbeitsplätzen im Sinne§2der Bildschirmarbeitsverordnung geeignet. Laser safety information IBM® servers can use I/O cards or features that are fiber-optic based and that utilize lasers or LEDs. Laser compliance All lasers are certified in the U.S. to conform to the requirements of DHHS 21 CFR Subchapter J for class 1 laser products. Outside the U.S., they are certified to be in compliance with IEC 60825 as a class 1 laser product. Consult the label on each part for laser certification numbers and approval information. CAUTION: This product might contain one or more of the following devices: CD-ROM drive, DVD-ROM drive, DVD-RAM drive, or laser module, which are Class 1 laser products. Note the following information: v Do not remove the covers. Removing the covers of the laser product could result in exposure to hazardous laser radiation. There are no serviceable parts inside the device. v Use of the controls or adjustments