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Tape drives HP C1553A and SONY SDT-7000

Posted on 1997-05-07
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Last Modified: 2012-06-27
Hello experts,

we are running Solaris 2.5 on Sun Workstations.
The drives i'm talking about are connected to sparc 20 and 10
respectively (both have the SCSI ID set to 5).

We bought a C1553A (autoloader from HP) two months ago. We use it
for daily backup. The problem is that it detects so many (read
or write) errors that it tells "WORN MEDIA". The tapes are almost
new (less than 10 writes and reads).

I checked on hp support web pages and it looks like if the
configuration i have is ok.

The other problem is that when a write(dump or tar) is done on
HP 1553 one cannot restore the data from a SONY SDT-7000 drive
and vice versa.

I'd like to compare my config with people working with such devices.
So i'll know if i misconfigured something.
Please could you send me the switches settings and st.conf lines
you have?

Mine is (for the C1553A) :
--------------------------
        SWITCHES :1    2    3    4    5    6    7    8
                  ON   ON   OFF  ON   ON   ON   ON   ON  (default)
        Back side switches :    1    2    3    4
                                ON   OFF  ON   OFF  (Solaris2)
        /kernel/drv/st.conf :
tape-config-list=
        "HP      HPC15",        "HPC15x3A",     "hpc15x3a";
hpc15x3a        =       1,0x34,0,0xd239,4,0x00,0x3,3;


For the SONY SDT-7000 i do not have anything in st.conf!!!
---------------------


Thank in advance for your help.

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Question by:Fiete
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Expert Comment

by:henrie
ID: 1008922
Sorry, I don't work with Sun/Sparc, but have experience with the drives.

Don't know if this is relevant but I read this on the HP web:
For Sun, Silicon Graphics and IBM RS6000, put switch 8 in the OFF position to disable MRS (=media recognition system).

And maybe you checked, but:
1. Are the tapes DDS?
2. Try switch 1 OFF to disable data compression...It might then be compatible with the Sony. It's a hardware compression method that is used in the drive, probably not the same as with the Sony..
3. Did you set the right blocksize?

Hope this gets you in the right direction,

Henrie.

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Accepted Solution

by:
henrie earned 100 total points
ID: 1008923
Found out that SONY 7000 is a Quad speed drive. I think that's where your problems with the tape come from. You probably have to bulkerase them before you can use them in your HP...

Let me know...

Henrie.

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