Re: SCSI tape problems: 2.6.12, DLT 7000, Adaptec AIC7xxx

Re: SCSI tape problems: 2.6.12, DLT 7000, Adaptec AIC7xxx

[Robert Valentan]

(and  Re: Linux-2.6.13-rc6: aic7xxx testers please..  )

Hi!

I have also the problem with a dlt drive HP C9264CB (with
media changer). After I have discovered, that after a

rmmod st ; modprobe st

the tape is working again, I take same "readings" in the
code of st.c.
I think, I have detect a bug. The st_buf_fragment[] should
begin after the scatterlist[]

*** st.c.orig   2005-08-23 20:43:17.304704439 +0200
--- st.c        2005-08-23 20:43:45.402087696 +0200
***************
*** 3530,3536 ****
         tb->use_sg = max_sg;
         if (segs > 0)
                 tb->b_data = page_address(tb->sg[0].page);
!       tb->frp = (struct st_buf_fragment *)(&(tb->sg[0]) + max_sg);

         tb->in_use = 1;
         tb->dma = need_dma;
--- 3530,3536 ----
         tb->use_sg = max_sg;
         if (segs > 0)
                 tb->b_data = page_address(tb->sg[0].page);
!       tb->frp = (struct st_buf_fragment *)(&(tb->sg[max_sg])); 

         tb->in_use = 1;
         tb->dma = need_dma;



I have it not tested, because the tape drive is in a datacenter
of a provider, and "killing" the kernel will not be repairable
with an ssh-connect ;-(  I can't get the tape out off the data-
center before friday..

wbr
-- 
Robert Valentan

Re: SCSI tape problems... (solved?)

[Robert Valentan]

Hi!

I think, I have found the problem with SCSI-Tapes
(Error 80000).
I have detect, that the sgraidmon is testing all sg-devices,
and if the inquiry-command fails (timeout) it sends a bus-
reset-command (ioctl) as "recovery"-operation !
After stopping the sgraidmon I have no more problems with
the tape.

Can anybody confirm this?


-- 
Robert Valentan