Running Open Boot Prom (OBP) commands "probe-scsi" and "probe-scsi-all" without a subsequent "reset-all" on any Sun UltraSPARC server (except Sun Fire 12K/15K) may hang the system on reboot when using the "boot" or "boot -v" commands.

This issue can occur on the following platforms:

SPARC Platform

• Sun UltraSPARC Servers (except Sun Fire 12K/15K)

Should the described issue occur, messages similar to the following may be seen on the console output (shown here following the reboot of the system with "boot -v"):

    WARNING: pcisch4: ino 0x8 has been blocked
    WARNING: qlc0: interrupt #0 has been blocked
    WARNING: pcisch4: ino 0x8 has been blocked
    WARNING: qlc0: interrupt #0 has been blocked
    PCI-device: SUNW,qlc@4, qlc0
    qlc0 is /ssm@0,0/pci@1a,700000/pci@3/SUNW,qlc@4
    PCI-device: SUNW,qlc@5, qlc1
    qlc1 is /ssm@0,0/pci@1a,700000/pci@3/SUNW,qlc@5
    WARNING: pcisch8: ino 0x8 has been blocked
    WARNING: qlc2: interrupt #0 has been blocked
    WARNING: pcisch8: ino 0x8 has been blocked
    WARNING: qlc2: interrupt #0 has been blocked
    PCI-device: SUNW,qlc@4, qlc2
    qlc2 is /ssm@0,0/pci@1c,700000/pci@3/SUNW,qlc@4
    PCI-device: SUNW,qlc@5, qlc3
    qlc3 is /ssm@0,0/pci@1c,700000/pci@3/SUNW,qlc@5
    fp0 is /ssm@0,0/pci@1a,700000/pci@3/SUNW,qlc@4/fp@0,0
    fp1 is /ssm@0,0/pci@1a,700000/pci@3/SUNW,qlc@5/fp@0,0
    fp2 is /ssm@0,0/pci@1c,700000/pci@3/SUNW,qlc@4/fp@0,0
    fp3 is /ssm@0,0/pci@1c,700000/pci@3/SUNW,qlc@5/fp@0,0
    root on /pseudo/vxio@0:0 fstype ufs
    WARNING: forceload of drv/SUNW,isptwo failed
    WARNING: forceload of drv/pci failed
    /scsi_vhci (scsi_vhci0) multipath capabilities are disabled
    through driver configuration file.
    ...
    ...
    ...

To work around the described issue, the OBP command "probe-scsi" or "probe-scsi-all" must be followed by the "reset-all" command before re-booting, otherwise, a subsequent "boot" or "boot -v" may hang the system.

Note: A requirement prior to performing the above sequence is to first set the "auto-boot?" parameter to "false" with the command:

    ok> setenv auto-boot? false

followed by the "probe-scsi" command, then again by "reset-all" prior to rebooting the system.

Please see the "Relief/Workaround" section above.

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