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July 2003, Week 2

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Subject:
Re: SCSI addresses on /918-LX and their relation to the i/o path
From:
Wirt Atmar <[log in to unmask]>
Reply To:
[log in to unmask]
Date:
Sun, 13 Jul 2003 10:28:17 EDT
Content-Type:
text/plain
Parts/Attachments:
text/plain (73 lines) 
Kurt asks:

> I want to add a DDS-2 Drive to our 918/LX which already has
>  2 disks and 1 DDS-1 (C1504) connected.
>
>  I have to set the jumpers on the DDS-2 to set the SCSI address correctly.
>  (I know how to set the jumpers to obtain a needed SCSI address).
>
>  How can I find out which SCSI addresses are already used by the DDS-1
>  the discs WITHOUT removing the drives to inspect the jumpers?
>
>  How do I have to set the  PATH variable in Sysgen, io, adev to match
>  the new SCSI address of the DDS-2?
>
>  From the actual PATH values of the discs and the DDS-1 in
>  Sysgen, io, ldev
>  I cannot see the mapping logics from SCSI address to PATH values ...
>
>  Any help will be greatly appreciated. Thanks.

To which I reply curtly: the information you want is displayed when you run
SYSINFO.PRVXL.TELESUP:

=======================================

:sysinfo.prvxl.telesup
--------------------------------------------------------------------------
SysInfo_XL (A.05.00) cm2 10.98        MPE XL - HP3000 System Support Tool
SUN, JUL 13, 2003,  8:20 AM            Copyright Hewlett Packard Co. 1989
SysInfo_XL is designed for use by Hewlett Packard Support personnel only.
HP IS NOT LIABLE FOR DAMAGES RESULTING FROM UNAUTHORIZED USE
--------------------------------------------------------------------------

System Information as of SUN, JUL 13, 2003,  8:20 AM

MPEXL HP31900C.25.06         OS: C.65.00      User Version: C.65.00
CPU Model: SERIES 918LX          Memory : 128 Mb
CPU ID   : 1159116381  ($4516B65D)  Single Processor  Limited to 8 Users

)io

------------------------- IO Configuration -------------------------

                                               Highest Ldev: 311

Ldev  Path             Device Type     Device ID     Device Mgr      Class
Name

  1   56/52.5.0        Disk            HPC2247M1     SCSI_DISC_DM    DISC
                                                                     SPOOL
  2   56/52.6.0        Disk            HPC2247M1     SCSI_DISC_DM    DISC
                                                                     SPOOL
  3                    Terminal        SubClass  8
  6   56/52.8.0        Serial Printer  HP2567B       SCSI_DISC_DM
  7   56/52.0.0        Tape            HPC1503B      SCSI_TAPE_DM    TAPE
                                                                     DDUMP
                                                                     TAPE1
 10   56/52.9.0        Tape            HPC1503B      SCSI_TAPE_DM    JOBTAPE
 20   56/56.0          Terminal        TMux          CDM_CONSOLE_DM  CONSOLE
 21   56/56.1          Terminal        TMux          CDM_CONSOLE_DM  TERM
 22   56/56.3          Terminal        TMux          CDM_CONSOLE_DM  HPUPSDEV

=========================================

The third number, reading left to right, of the path address is the SCSI bus
address of the peripheral, as you currently have it installed. In the example
above, the disk named LDEV 1 is at SCSI bus address 5.

Wirt Atmar

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