Date: Thu, 12 Dec 2002 22:52:24 +0800 (CST) From: Alex Wang <alex@alexwang.com> To: FreeBSD-gnats-submit@FreeBSD.org Subject: kern/46209: [PATCH] Can't max-use the DDS-2 and DDS-4 tape in HP DAT 40 tape drive Message-ID: <200212121452.gBCEqOlK003872@alexwang.com>
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>Number: 46209
>Category: kern
>Synopsis: [PATCH] Can't max-use the DDS-2 and DDS-4 tape in HP DAT 40 tape drive
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: change-request
>Submitter-Id: current-users
>Arrival-Date: Thu Dec 12 07:00:17 PST 2002
>Closed-Date:
>Last-Modified:
>Originator: Alex Wang
>Release: FreeBSD 4.7-RELEASE i386
>Organization:
>Environment:
System: FreeBSD alexwang.com 4.7-RELEASE FreeBSD 4.7-RELEASE #0: Mon Oct 14 05:21:51 CST 2002 alex@alexwang.com:/usr/src/sys/compile/ALEX i386
>Description:
I am using the HP DAT 40 tape drive. I found that I can't mix-use
the DDS-2 and DDS-4 tapes.
If I insert DDS-4 tape in the tape drive at boot time, I can
write and read both DDS-2 and DDS-4 tapes. At that moment,
the block size is 1024 KB. Next time I insert DDS-2 in the tape
device at boot time. The block size becomes variable and I am
not able to read the data in both DDS-2 and DDS-4.
I know that I could use mt(1) to set the blocksize. But I suggest
that we could add this in scsi driver. I spent a lot of time to
find out this problem and don't want other to waste their time
again.
Thanks,
Wang, Chun-Pin (Alex Wang)
>How-To-Repeat:
>Fix:
--- scsi_sa.patch begins here ---
Index: scsi_sa.c
===================================================================
RCS file: /home/ncvs/src/sys/cam/scsi/scsi_sa.c,v
retrieving revision 1.45.2.12
diff -u -b -r1.45.2.12 scsi_sa.c
--- scsi_sa.c 2002/08/02 06:25:56 1.45.2.12
+++ scsi_sa.c 2002/12/12 14:42:26
@@ -306,6 +306,10 @@
#endif
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
+ "C56*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
+ },
+ {
+ { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
"T20*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
},
{
--- scsi_sa.patch ends here ---
>Release-Note:
>Audit-Trail:
>Unformatted:
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