[comp.sys.sun] Disks in sync mode on SS1+ under 4.1

jim@uunet.uu.net (Jim Hood) (07/28/90)

I just attached a Fujitsu M2263SA to my SS1+. An enclosed tech note from
the OEM's office here in Canada states:

"The Sun 4 systems require the drive to operate as SCSI-CCs not SCSI-2.
... The drive can be operated in the synchronous mode."

When I ran the format utility, though, the controller complained:
	"esp0: spurious data in phase from target 2; fifo_flag 0"

However, vendor tech support, when called, instructed me to remove the
appropriate jumper, etc. and disable synchronous mode operation. He was
right, it works fine that way. Now, later I heard a "rumour" that there is
a kernel patch circulating that allows synchronous operation of drives.
True? What gives?

Jim Hood		jim@forgen.uucp  		or:
{ uunet!attcan  att  pyramid!utai  utzoo } !lsuc!forgen!jim

chris@com50.c2s.mn.org (Chris Johnson) (07/31/90)

Which version of the Sun Operating System are you running?  Latest versions
have support for, and enable, synchronous operation.  Prior to the latest
version, support seemed to be there, but was not enabled although it could
be with an adb patch to the kernel.  Earlier still versions did not
support synchronous operation, and neither did earlier hardware.

   ...Chris Johnson          chris@c2s.mn.org   ..uunet!bungia!com50!chris
 Com Squared Systems, Inc.   St. Paul, MN USA   +1 612 452 9522