User manual HP PROLIANT DL740 SERVER

[. . . ] HP ProLiant DL740 Server User Guide June 2003 (Second Edition) Part Number 270854-002 © 2002, 2003 Hewlett-Packard Development Group, L. P. Microsoft®, Windows®, and Windows NT® are US registered trademarks of Microsoft Corporation. Intel® is a registered trademark of Intel Corporation in the US and other countries. Hewlett-Packard Company shall not be liable for technical or editorial errors or omissions contained herein. [. . . ] The integrated controller is hardwired through an Array Enabler board to the four SCSI hard drive bays. HP ProLiant DL740 Server User Guide 5-25 Installing Hardware Options, Hot-Plug Installing a Hot-Plug SCSI Hard Disk Drive CAUTION: Before adding or removing any hot-plug SCSI drives, consult the operating system instructions. Failure to do so could result in loss of data or damage to equipment. To install a hot-plug SCSI hard drive: 1. Remove the blanking panel in an unused drive bay by pushing the sides of the retaining clips inward (1), and then pull the blanking panel outward (2), as shown in Figure 5-11. Figure 5-11: Removing a hard-drive blanking panel 2. Push the release button on the left of the new drive and rotate the hot-plug drive ejector lever outward to unlock the drive. 5-26 HP ProLiant DL740 Server User Guide Installing Hardware Options, Hot-Plug 3. Insert the new hot-plug drive into the empty drive bay, pushing until the unit is securely seated (1). Secure the hot-plug drive in the drive cage by swinging the ejector lever inward (2), as shown in Figure 5-12. Figure 5-12: Installing a SCSI hard drive Guidelines for Replacing Hot-Plug SCSI Hard Drives You should be able to hot-plug a drive during normal activity. Be aware, however, that replacing a hot-pluggable disk drive will affect system performance and fault tolerance. NOTE: Depending on the configuration, both a drive failure and the subsequent rebuild process will cause storage subsystem performance degradation. For example, the replacement of a single drive on an array with 50 logical drives will have less impact than if the array has only 3 logical drives. HP ProLiant DL740 Server User Guide 5-27 Installing Hardware Options, Hot-Plug Advanced Data Guarding When a hot-pluggable disk drive is removed, although the system is functionally operational, the disk subsystem may no longer be fault tolerant. Fault tolerance will be lost until the removed drive is subsequently replaced and the rebuild operation is completed. This procedure takes several hours, even if the system is not busy while the rebuild is in progress. If another drive in the array should incur an error during the period when fault tolerance is unavailable, a fatal system error could result. If another drive fails during this period, the entire array contents will be lost. IMPORTANT: Perform disk drive replacement during low activity periods whenever possible. In addition, a current valid backup of the logical drives in the array of the drive being replaced should be available even if the drive replacement is being made during server downtime. When replacing hot-plug hard drives in a fault-tolerant configuration, you must follow these guidelines: · Never remove more than one drive at a time. When a drive is replaced, the controller uses data from the other drives in the array to reconstruct data on the replacement drive. If more than one drive is removed, a complete data set is not available to reconstruct data on the replacement drive. Never remove a working drive when another drive has failed. Drives that have been designated as failed by the controller are indicated by the amber Drive Failure LED on the drive tray. Permanent data loss will occur if a working drive is removed while a failed drive is being replaced. Never remove a drive while another drive is being rebuilt. The Online LED on a drive will flash green while it is being rebuilt. A replaced drive is restored from data stored on the other drives. · · 5-28 HP ProLiant DL740 Server User Guide Installing Hardware Options, Hot-Plug · Never turn a disk enclosure off while the initiator or controller is powered on or active. Doing so can cause the initiator or controller to mark the drives as failed. [. . . ] Note at which phase the operating system failed. Refer to your operating system documentation. Reinstall the operating system. Refer to your operating system documentation and to the SmartStart Release Notes on the SmartStart CD. Use the ROM-Based Setup Utility to troubleshoot where the installation failed. Problem was encountered with the hardware that you added to the system. Refer to the documentation provided with the hardware. [. . . ]