Docs for HP 35480A SCSI DAT drive's DIP switch settings?

Docs for HP 35480A SCSI DAT drive's DIP switch settings?

Post by Michael Hohmu » Fri, 23 Jun 1995 04:00:00



I need  documentation about the DIP switch settings for the HP 35480A
SCSI DAT drive.  When queried, the drive identifies itself as
"HP       HP35480A         1109".  (I believe that 1109 is the
firmware revision number.)

Can anyone point me to relevant information?

The manual that came with the drive only describes the first two
sitches...  As I'm having problems with the drive, I need a more docs.

Thanks in advance,
Michael
--

WWW:   http://www.inf.tu-dresden.de/~mh1/

 
 
 

Docs for HP 35480A SCSI DAT drive's DIP switch settings?

Post by Alan Strassbe » Fri, 23 Jun 1995 04:00:00




>I need  documentation about the DIP switch settings for the HP 35480A
>SCSI DAT drive.  When queried, the drive identifies itself as

        Maybe this should get in the FAQ ?

        HP DDS Configuration Guide (postscript) can be found:
        http://www.impediment.com/hp/hp_2.ps

                                alan
--
-------------

Lockheed Martin - Santa Cruz, California.

 
 
 

Docs for HP 35480A SCSI DAT drive's DIP switch settings?

Post by Zenon Fortu » Fri, 23 Jun 1995 04:00:00


In article <3sc3sp$...@irzr17.inf.tu-dresden.de>,

Michael Hohmuth <hohm...@inf.tu-dresden.de> wrote:
>I need  documentation about the DIP switch settings for the HP 35480A
>SCSI DAT drive.  When queried, the drive identifies itself as
>"HP       HP35480A         1109".  (I believe that 1109 is the
>firmware revision number.)

>Can anyone point me to relevant information?

>The manual that came with the drive only describes the first two
>sitches...  As I'm having problems with the drive, I need a more docs.

>Thanks in advance,
>Michael
>--
>Email: hohm...@inf.tu-dresden.de
>WWW:   http://www.inf.tu-dresden.de/~mh1/

The document included below shows up on c.s.hp.* groups from time to time ...

        Zenon

-----------------------------------------------------------------------

This response does not represent the official position of, or
statement by, the Hewlett-Packard Company.  This data is
provided for informational purposes only. It is supplied
without warranty of any kind.

====================================================================
HP35470A, HP35480A, C1533A, C1553A  DDS DRIVE CONFIGURATION SWITCHES
-------------------------------------------------------
Note: The data supplied applies to drives containing standard
      distributor product code. A drive with this code will report
      "09" in bytes 34 and 35 of its standard SCSI Inquiry data.
      Even if it does not report "09", it is possible (though not
      certain) that its switch configurations are very similar to
      the description below.

There are 8 configuration switches on the underside of the drive.
These are numbered 1 thru 8.

SWITCHES 1+2
-----------------
These control data compression on the HP35480. (The 35470 does not
have data compression circuitry. These switches should be left set to
"1" in the 35470). When data compression is ENABLED the drive
(HP35480) will write compressed data in DDS-DC format. When compression
is disabled, the drive will write DDS format data. Note that the
drive will read and de-compress DDS-DC written tapes irrespective
of whether compression is ENABLED or DISABLED, ie. switching
compression on/off only applies to WRITES.

SWITCH1 = 1 means the drive defaults to writing DDS-DC format data.
        = 0 means the drive defaults to writing DDS format data.
   HP35470A drives cannot de-compress data from DDS-DC format tapes.
   The 35470A can return the compressed data via SCSI for a host to
   de-compress. The level of support for decompressing DAT data
   in host drivers is currently NIL, so for practical purposes,
   it is reasonable to say that you can't read a DDS-DC tape
   with a non compressing drive.
   (Note: Default compression may also be controlled via a pin
          on the rear of the drive. This enables some boxed drives to
          have a compression on/off selector switch).

SWITCH2 = 1 means the host has the ability to turn compression on/off
          via the SCSI Mode Select command (data compression mode page).
          Thus the drive powers up with compression determined by
          switch1, but the host may subsequently use a Mode Select
          command to ENABLE/DISABLE compression.
          (Note: some UNIX systems, eg HP-UX have drivers which
                 select compression using Mode Select depending on
                 minor numbers in the device file.)
         = 0 means that the drive ignores host requests to change
           compression. Furthermore, a 35480 drive with this switch "0"
           will report that it is a 35470 drive in its Inquiry data.

It is reccomended that both switches 1 and 2 be set "ON".

SWITCHES 3 TO 8
---------------------
These switches configure various SCSI "features".
Note that there is no 1-1 mapping of features to switches.
A specific pattern of switches will enable a SET OF FEATURES.
There are 2 tables below which map switch settings to feature sets.
The Left hand column of these tables specifies "host", and a 3rd
table shows additional features that are configured depending on the
host.

eg. If you want "EWEOM on read error", "Switch Buffered" and
    "Caution Hard Error" features only, then switch setting 001111
    (for both tables) will do this. (001111 enables hosts of type
    "Other" which results in the "EWEOM on read error" feature
     being enabled).

------------------------------------------------------------------------------
| Host  | Switch   | Perfor | Caution | Default | Parity | No Data || Switches|
|       | Buffered | mance  | hard    | Fixed   | off    | phase   ||         |
|       |          |        | error   | Mode    |        | discon  || 345678  |
|-----------------------------------------------------------------------------|
| HP    |   1      |        |   1     |         |        |         || 111111  |
| HP    |   1      |        |         |         |        |         || 110111  |
| HP    |   1      |   1    |   1     |         |        |         || 111011  |
| DEC   |   1      |        |   1     |         |        |         || 111110  |
| DEC   |   1      |   1    |   1     |         |        |         || 111010  |
| DEC   |   1      |   1    |         |         |        |         || 110010  |
| Other |   1      |        |   1     |         |        |         || 111100  |
| Other |   1      |        |   1     |         |        |   1     || 011100  |
| Other |   1      |        |   1     |         |   1    |         || 101100  |
| Other |   1      |        |   1     |         |   1    |   1     || 001100  |
| Other |   1      |        |   1     |   1     |        |         || 110100  |
| Other |   1      |        |   1     |   1     |        |   1     || 010100  |
| Other |   1      |        |   1     |   1     |   1    |         || 100100  |
| Other |   1      |        |   1     |   1     |   1    |   1     || 000100  |
| Other |   1      |   1    |   1     |         |        |         || 111000  |
| Other |   1      |   1    |         |         |        |         || 110001  |
| Other |   1      |   1    |   1     |         |        |   1     || 011000  |
| Other |   1      |   1    |         |         |        |   1     || 010001  |
| Other |   1      |   1    |   1     |         |   1    |         || 101000  |
| Other |   1      |   1    |         |         |   1    |         || 100001  |
| Other |   1      |   1    |   1     |         |   1    |   1     || 001000  |
| Other |   1      |   1    |   1     |   1     |        |         || 110000  |
| Other |   1      |   1    |   1     |   1     |        |   1     || 010000  |
| Other |   1      |   1    |   1     |   1     |   1    |         || 100000  |
| Other |   1      |   1    |   1     |   1     |   1    |   1     || 000000  |
| Other |          |        |   1     |         |        |         || 111101  |
| Other |          |   1    |   1     |         |        |         || 111001  |
------------------------------------------------------------------------------

Distributor Switch Selections -- until 35470A version 9.47
                                 until 35480A version 9.49 (inclusive)

----------------------------------------------------------------------||-----------
| Host  | MRS | Perfor | Caution | Default | Parity | No Data | Inq   || Switches|
|       | ON  | mance  | hard    | Fixed   | off    | phase   | 35480 ||         |
|       |     |        | error   | Mode    |        | discon  |       || 345678  |
|---------------------------------------------------------------------||---------|
|   HP  |     |        |   1     |         |        |         |       || 111111  |
|   HP  |  1  |        |   1     |         |        |         |       || 011111  |
|   HP  |     |        |         |         |        |         |       || 110111  |
|   HP  |  1  |        |         |         |        |         |       || 010111  |
|   HP  |     |   1    |   1     |         |        |         |       || 111011  |
|   HP  |  1  |   1    |   1     |         |        |         |       || 011011  |
|   HP  |     |        |   1     |         |        |         |   1   || 100011  |
|   DEC |     |        |   1     |         |        |         |       || 111110  |
|   DEC |  1  |        |   1     |         |        |         |       || 011110  |
|   DEC |     |   1    |   1     |         |        |         |       || 111010  |
|   DEC |  1  |   1    |   1     |         |        |         |       || 011010  |
|   DEC |     |   1    |   1     |         |        |   1     |       || 101010  |
|   DEC |  1  |   1    |   1     |         |        |   1     |       || 001010  |
| Other |  1  |        |   1     |    1    |        |         |       || 110101  |
| Other |  1  |   1    |   1     |         |        |         |       || 111001  |
| Other |  1  |   1    |   1     |         |        |   1     |       || 011001  |
| Other |  1  |   1    |   1     |         |    1   |         |       || 101001  |
| Other |  1  |   1    |   1     |         |    1   |   1     |       || 001001  |
| Other |  1  |   1    |   1     |    1    |        |   1     |       || 010001  |
| Other |  1  |   1    |   1     |    1    |    1   |   1     |       || 000001  |
| Other |     |        |   1     |         |        |         |       || 111100  |
| Other |     |        |   1     |    1    |        |         |       || 110100  |
| Other |     |   1    |   1     |         |        |         |       || 111000  |
| Other |     |   1    |   1     |         |        |   1     |       || 011000  |
| Other |     |   1    |   1     |         |    1   |         |       || 101000  |
| Other |     |   1    |   1     |         |    1   |   1     |       || 001000  |
| Other |     |   1    |   1     |    1    |        |   1     |       || 010000  |
| Other |     |   1    |   1     |    1    |    1   |   1     |       || 000000  |
--------------------------------------------------------------|-------||-----------|

Distributor Switch Selections -- after 35470A version 9.47
...

read more »

 
 
 

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Btw, the advertised transfer rate to the drive is 44 MB/min (73x what
I'm getting).

----
--
Kevin Layer, Franz Inc.         1995 University Avenue, Suite 275

Phone: (510) 548-3600           FAX: (510) 548-8253

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