Date: Fri, 4 Oct 1996 12:49:07 -0700 (PDT) From: curt@emergent.com To: freebsd-gnats-submit@freebsd.org Subject: kern/1724: HP colorado T4000S tape drive hangs system on many scsi controllers Message-ID: <199610041949.MAA10202@freefall.freebsd.org> Resent-Message-ID: <199610041950.MAA10274@freefall.freebsd.org>
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>Number: 1724
>Category: kern
>Synopsis: HP colorado T4000S tape drive hangs system on many scsi controllers
>Confidential: no
>Severity: serious
>Priority: high
>Responsible: freebsd-bugs
>State: open
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Fri Oct 4 12:50:01 PDT 1996
>Last-Modified:
>Originator: Curt Mayer
>Organization:
Emergent Corporation
>Release: 2.1.5
>Environment:
FreeBSD mofo.emergent.com 2.1.5-RELEASE FreeBSD 2.1.5-RELEASE #2: Tue Aug 20 13:00:22 PDT 1996 root@mofo.emergent.com:/usr/src/sys/compile/MOFO i386
>Description:
the HP colorado T4000S is a scsi travan tape drive with performance
in the 500Kb/sec range, with 4Gb capacity. It currently sells for
less than $400.00. any attempts to access it cause scsi bus hangs
due to a failed mode select. the T4000S does not support a density
select, as density is automatically determined by the mounted medium.
>How-To-Repeat:
od /dev/rst0.0
or any other thing like that.
>Fix:
the following patch to scsi/st.c:
*** st.c Tue Aug 20 12:59:57 1996
--- /home/curt/st.c Fri Oct 4 12:39:44 1996
***************
*** 92,97 ****
--- 92,98 ----
#define ST_Q_SNS_HLP 0x00008 /* must do READ for good
MODE SENSE */
#define ST_Q_IGNORE_LOADS 0x00010
#define ST_Q_BLKSIZ 0x00020 /* variable-block media_
blksiz > 0 */
+ #define ST_Q_NOMODESEL 0x00040 /* no mode select - use
defaults */
static struct rogues gallery[] = /* ends with an all-null entry */
{
***************
*** 149,154 ****
--- 150,164 ----
{0, ST_Q_FORCE_VAR_MODE, 0x13} /* minor 12,13,14,15 */
}
},
+ {"HP T4000s rev 1.05", "HP ", "T4000s", "1.05",
+ ST_Q_NOMODESEL,
+ {
+ {0, 0, 0}, /* minor 0,1,2,3 */
+ {0, 0, 0}, /* minor 4,5,6,7 */
+ {0, 0, 0}, /* minor 8,9,10,11 */
+ {0, 0, 0} /* minor 12,13,14,15 */
+ }
+ },
{(char *) 0}
};
#endif /* NEW_SCSICONF */
***************
*** 718,730 ****
return errno;
}
}
! #ifdef notdef
! if ( (errno = st_mode_select(unit, 0, NULL, 0)) ) {
! printf("st%ld: Cannot set selected mode", unit);
! return errno;
}
! #endif
! scsi_prevent(sc_link, PR_PREVENT, 0); /* who cares if it fails? */
st->flags &= ~ST_NEW_MOUNT;
st->flags |= ST_MOUNTED;
sc_link->flags |= SDEV_MEDIA_LOADED;
--- 728,741 ----
return errno;
}
}
! if (!(st->quirks & ST_Q_NOMODESEL)) {
! if ( (errno = st_mode_select(unit, 0, NULL, 0)) ) {
! printf("st%ld: Cannot set selected mode\n", unit);
! return errno;
! }
}
! scsi_prevent(sc_link, PR_PREVENT, SCSI_SILENT);
! /* who cares if it fails? */
st->flags &= ~ST_NEW_MOUNT;
st->flags |= ST_MOUNTED;***************
*** 1278,1284 ****
* drive. If not, put it back the way it was.
*/
if ( (errcode = st_mode_select(unit, 0, NULL, 0)) ) { /* put back as i
t was */
! printf("st%d: Cannot set selected mode", unit);
st->density = hold_density;
st->blksiz = hold_blksiz;
if (st->blksiz) {
--- 1289,1295 ----
* drive. If not, put it back the way it was.
*/
if ( (errcode = st_mode_select(unit, 0, NULL, 0)) ) { /* put back as i
t was */
! printf("st%d: Cannot set selected mode\n", unit);
st->density = hold_density;
st->blksiz = hold_blksiz;
if (st->blksiz) {
sc_link->flags |= SDEV_MEDIA_LOADED;
>Audit-Trail:
>Unformatted:
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