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HP-UX 11i Version 1.5 Installation and Configuration Guide: release id B.11.20for rx9610 and rx4610 hp serversand i2000 hp workstations > Chapter 1 Introduction and Related Information

SCSI Devices

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External mass storage is not supported on the i2000 hp workstations.

LSI LVD UltraII SCSI Controller

On Itanium-based servers, unlike PA-based systems, the LSI LVD UltraII SCSI controller, part number A5149A, can not boot from targets with SCSI ID greater than 7. These controllers have the Sub System ID Bits (SSID) set such that the card is forced into narrow mode.

Specifying Bootable Devices in the LSI BIOS

The LSI BIOS is used to determine which SCSI HBAs are searched for bootable devices. The LSI BIOS limits this selection to a maximum of four possible choices, determined by the PCI bus slot order. Any boot target must reside on one of those default controllers.

NOTE: HP-UX will let you install to any device on the system but if the device is not on one of the default controllers you can not boot from it.

QLogic SCSI Adapter Rates

For the rx9610 and rx4610 servers, some JBOD (Just a Bunch Of Disk) enclosures contain internal cabling for a slower SCSI rate than newer disk devices may accept. If an Ultra160 disk accepts the higher rate in an Ultra2 enclosure, a hang will occur in data transfers. To force the autonegotiation to use a slower rate, you must configure the SCSI adapter.

Procedure 1-1 Setting external QLogic SCSI connector for JBODs:

  1. Enter Alt-Q when prompted on machine book

  2. Choose

    Configuration Settings->Host Adapter Settings
    Adapter Configuration: Manual

    Changing to Manual mode allows access to all the fields in the device settings screen.

  3. Choose

    Configuration Settings->SCSI Device Settings->Bus 1

    Press TAB to move to the left column (affects all devices in this model)

    Jamaica BOX JBOD (Fast settings):


    Sync Offset: 8
    Sync Period: 25

    SC10 Megatron (Ultra2 settings):


    Sync Offset: 14
    Sync Period: 10

  4. Configuration Settings->Host Adapter Settings
    Adapter Configuration: AUTO

    Changing back to AUTO mode allows autonegotiation to occur but based on the new device settings. Leaving this at Manual may cause the card to complain with warnings as the settings are forced on the SCSI devices without negotiation.

  5. Save changes and reboot

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