Sun System Handbook - ISO 3.4 June 2011 Internal/Partner Edition | |||
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Solution Type Technical Instruction Sure Solution 1010667.1 : Ultra[TM] 5 and Ultra[TM] 10 Systems: Why the CDROM device in Ultra 5 and Ultra 10 systems should not be configured as a master device
PreviouslyPublishedAs 214731 Description This document describes the reason for not selecting or configuring the CDROM device as the master IDE device in Ultra[TM] 5 and Ultra[TM] 10 systems. This document also describes the configuration of Sun[TM] standard internal devices for Ultra 5 and Ultra 10 systems. Steps to Follow Ultra 5 and Ultra 10 Supported Internal Device Configuration. he following configuration is not recommended for the Ultra 5 and Ultra 10 systems: * The CDROM is selected as master. * The hard disk drive is selected as slave on the same IDE connector (either primary or secondary). Configuring a CD-ROM as a master IDE device will cause performance, access, and mirroring issues, and lead to comparatively more errors than a hard drive: * Performance Issue ATAPI devices are generally much slower devices than hard disk drives; therefore, they can slow the transfer rate of the hard disk drive. Note: CD-ROMs, CD-RWs, DVDs, and tape drives are examples of "ATAPI" devices. * Access issue You cannot access the hard disk drive if the CD-ROM/DVD-ROM is configured as master and fails. * Mirroring issue If the hard disk drive is part of a submirror, then it will bring the entire mirror down if CD-ROM/DVD-ROM failure occurs, even though the hard disk drive itself is fine. The following configurations are the only qualified device configurations for Ultra 5 and Ultra 10 systems. Any other configurations will not be supported on the Ultra 5 and Ultra 10 systems. The following configuration is the recommended, standard configuration for the Ultra 5 and Ultra 10 systems: * Put the fastest drive as a single device on the primary channel. * Put the second hard disk drive as the master on the secondary channel. * Put the ATAPI as the slave on the secondary channel. ############################################### Standard Configuration ############################################### __________________________________ | | | ====^===== ____v_____ ____v_____ Primary Device 0 Device 1 Connector (Master) (Slave) ========== Disk Drive Disk Drive __________ __________ _________________ | | ====^===== ____v_____ Secondary Device 2 Connector (Master) ========== CDROM __________ ############################################### Optional Configuration (Used in Mirroring) ############################################### __________________________________ | | | ====^===== ____v_____ ____v_____ Primary Device 0 Device 1 Connector (Master) (Slave) ========== Disk Drive CDROM __________ __________ _________________ | | ====^===== ____v_____ Secondary Device 2 Connector (Master) ========== Disk Drive __________ ############################################### Optional Configuration (Used in Mirroring) ############################################### __________________ | | ====^===== ____v_____ Primary Device 0 Connector (Master) ========== Disk Drive __________ __________________________________ | | | ====^===== ____v_____ ____v_____ Secondary Device 2 Device 3 Connector (Master) (Slave) ========== Disk Drive CDROM __________ __________ ############################################### Special Notes: * The two hard drives that are mirrored cannot be on the same channel. Both hard drives must be jumpered as the master device on two separate channels. * If a CD-ROM drive is included in an Ultra 5 system with the hard drive mirroring configuration, the CD-ROM drive must be jumpered as a slave device on either the primary or the secondary channel. * If a mirrored Ultra 5 system includes a CD-ROM drive, the alias for the CD-ROM drive must be altered at the Open Boot Prom (OBP) level before a user can boot using the boot cdrom command. * If a mirrored Ultra 5 system includes a CD-ROM drive, the alias for the CD-ROM drive must be altered at the OBP level before a user can boot using the boot cdrom command. This is because the alias for the CD-ROM drive is hard-coded with the assumption that the CD-ROM drive is connected as the master device on the secondary channel (/pci@1f,0/pci@1,1/ide@3/cdrom@2,0:f). In a mirrored configuration, this is not true because the CD-ROM is jumpered as the slave device on the primary or secondary channel. Therefore, the alias is incorrect and must be altered. Use the "nvalias" command to alter a CD-ROM drive alias on the primary channel: nvalias cdrom /pci@1f,0/pci@1,1/ide@3/cdrom@1,0:f To change the alias for a CD-ROM drive on the secondary channel, enter the following: nvalias cdrom /pci@1f,0/pci@1,1/ide@3/cdrom@3,0:f Product Ultra 10 Workstation Ultra 5 Workstation Internal Comments Supporting Document -------------------------------------------------- * Einstein System Specification -Part No. 950-3464-01 (April 1999) ultra-5, ultra-10, ultra 5/10, drive configuration, mirroring configuration, mirroring, cdrom, internal devices configuration Previously Published As 74513 Change History Date: 2006-01-23 User Name: 25440 Action: Update Canceled Comment: *** Restored Published Content *** SSH AUDIT Version: 0 Date: 2006-01-23 User Name: 25440 Action: Update Started Comment: SSH AUDIT Version: 0 Attachments This solution has no attachment |
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