scsi problem on a scorpio (715)
Now that my 712 runs happily (Thanks again), I'm giving a
chance to my 715 (no more parisc systems after that :-) ).
(This post is a kind of follow up to a thread I have seen on
the parisc-linux archive. Feel free to comment where/how I
It has 2 disks (Quantum 525 MB & Seagate 525 MB) and the
installation crashes, while formating, if I try to install
on both drives, or try to do something with the Quantum drive.
Debian is installed on the Seagate drive and I would like to
use both drives.
"Reduce Tag queue depth or disable Write Cache"... Hum, so
my problem has a name and a solution. OK, so:
How do I disable write cache?
I downloaded scsitools and sg3-utils, I can see that write
cache is enabled (sg -a /dev/sdx). How do I disable that?
(By the way, disabling write cache is better for
"correctness", but I read somewhere that it may reduce the
(somewhat long now) drive life).
How do I reduce "Tag queue depth", i.e. recompile the 53c700
Do I have to:
- download kernel sources
- change #define NCR_700_MAX_TAGS in drivers/scsi/53c700.h
- then "simply" (well, I never did that) recompile and
install the new kernel?
Thanks for your help.