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  • 1.  Boot from AIX 7.3 USB media hangs with 0x518 (UNKNOWN BOOTDEV)

    Posted Fri May 12, 2023 01:03 PM

    Cannot figure it out. The system is POWER9 S922 (9009-22A), currently with AIX 7.2, no VIOS - single LPAR uses all resourses. 

    Booting from USB flash attached to the system.

    First thought that something wrong with the flash image, found old AIX 7.2 and even AIX 7.1 images - same issue (0x518, UNKNOWN BOOTDEV)

    Then wrote Linux PPC64LE image to the USB flash - that booted without any issues.

    Firmware is FW940.60 (VL940_098)

    0 > DISPLAY_BOOT_DEVICES #disk   

     Number  Position  Name
     1.        2      SAS 722 GB Harddisk ( loc=U78D3.001.WZS01P7-P1-C49-L8068c7a800-L0 )
     2.        -      USB Disk ( loc=U78D3.001.WZS01P7-P1-T3-L1-L0-L0 )

    0 > BOOT_FROM_DEVICE #disk U78D3.001.WZS01P7-P1-T3-L1-L0-L0 -s verbose

    .......

     cfgmgr Configuration time: 11 seconds
    + + bootinfo -b
    exec(/usr/sbin/bootinfo,-b){4784702,4719150}
    exec(/usr/lib/boot/bin/bootinfo_chrp,-b){4784702,4719150}
    bootdev=
    + [ !  ]
    + loopled 0x518 UNKNOWN BOOTDEV
    exec(/usr/lib/methods/showled,0x518,UNKNOWN BOOTDEV){4784704,4719150}
     showled 

    (((hangs)))

    Any way to diagnose this further and actually boot? I don't have a NIM server at the moment with appropriate level to try the network boot, also system is remote and at the moment does not have DVD attached.

    System does have spare disks, which could be used for (boot) experiments. 

    Please help!



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    Vladimir Kolobrodov
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  • 2.  RE: Boot from AIX 7.3 USB media hangs with 0x518 (UNKNOWN BOOTDEV)

    Posted Sun May 14, 2023 05:08 AM
    Edited by Satid Singkorapoom Sun May 14, 2023 05:19 AM

    Dear Vladimir

    How did you create the bootable USB drive for AIX ?  Did you use the method described in this Technote : How to create a bootable USB drive for AIX/VIOS at  https://www.ibm.com/support/pages/how-create-bootable-usb-drive-aixvios   In the last step, if you do not see a list of files from the ISO image, one possible reason is that the ISO image file may be corrupted and you may want to download the ISO image file again.

    This Technote can provide more useful information for you : Using and taking advantage from USB devices and AIX. at  https://www.ibm.com/support/pages/using-and-taking-advantage-usb-devices-and-aix#install.  Also this one :  USB flash drive support at  https://www.ibm.com/docs/en/aix/7.2?topic=support-usb-flash-drive.



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    Education is not the learning of facts but the training of the mind to think. -- Albert Einstein.
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    Satid S.
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    Original Message


  • 3.  RE: Boot from AIX 7.3 USB media hangs with 0x518 (UNKNOWN BOOTDEV)

    Posted Sun May 14, 2023 03:21 PM

    Hi, Satid

    Thank you for the comment.

    Yes, I thought about that as well. Took extra effort to verify that copy to USB is OK:

    1. Both the image and USB flash (after copy) can be mounted (on the target AIX 7.2) system and all files are visible.

    2. Hash (md5) generated from AIX install image matches one generated by reading same number of blocks from USB.

    3. Linux PPC64LE image written to the same USB flash boots fine.


    ------------------------------
    Vladimir Kolobrodov
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    Original Message