Autochanger with C1537A and Omniback : cannot open exchanger control device

[Mauro Cimino_2]

I have installed a C1537 Autoexchanger DDS on my system (HP-UX 11.11). It seem work by command line with the mc command , but I get the error in Subject when I use it on Omniback II 3.00. It' spossible that I havn't installed it properly? The resutl of ioscan is :

tape 1 8/16/6.5.3 stape CLAIMED DEVICE HP C1537A
/dev/rmt/1m ......

and I have done teh special file with:
mknod /dev/rmt/0m 203 0x0130000.
In the kernel there are the sctl, autox0 and schgr drive. Anybody can help me?

[Leif Halvarsson_2]

Hi,
Is it correct you are using OmniBack 3.0 . It has been out of support for some time now. I can't find information but it is perhaps not supported on HP-UX 11.11. You can test with the "uma" command (/opt/lbin/uma). It is similar to "mc" but a OmniBack utility. If you get problem with this too I think you need to upgrade OmniBack. As the "mc" command works your drivers seems OK. Have a look at man pages for uma.

[Ashwani Kashyap]

You may try this .

Delete your special file and recreate it wiht major number 231 , the major number for schgr driver .

[Gerrit Beyken]

Hi,

you have created you exchanger control devicefile with the wrong minor number (i think this is the minornumber of your tape).
You should do this:
- delete your created specialfile /dev/rmt/1m
- "ioscan -fnkC autoch" which will give you path to your exchanger control device
- "ll" the devicefile of your exchanger control devicefile /dev/rac/... to get the right minor number
- "lsdev -d sctl" to get the major number of the sctl driver
- mknod /dev/rmt/robot c
- check the devicefile by using the "uma" of Omniback "/opt/omni/lbin/uma -ioctl /dev/rmt/robot"; then you will get a prompt where you can do a e.g. "stat S" to get the status of your slots
- now modify your Omniback Library config accordingly

regards

Gerrit

[Leif Halvarsson_2]

Hi,
203 is the correct minor number if HP-UX 11.11, perhaps it is different in previous versions. I use this driver for our library and it works without problem.

[Mauro Cimino_2]

Sorry , but I havn't any autoch in output of my ioscan.
And ( for Ashwani) why I have to try 231 for Major Number? From where do you get this number?
Also , If I try uma utility I get the same error:
Cannot open exchanger control device ( not a scsi II Exchanger)

[Mauro Cimino_2]

OK!!
I have remade the special file with

mknod /dev/rmt/0pick 203 0x013100

and now it seems to be working.
Thanks to all you for the answers, Mauro