Patch Name: PHKL_8753
Patch Description: s700 10.10 GSC SCSI tape driver cumulative patch
Creation Date: 97/01/20
Post Date: 97/02/07
Hardware Platforms - OS Releases:
s700: 10.10
Products: N/A
Filesets:
OS-Core.CORE-KRN ProgSupport.C-INC
Automatic Reboot?: Yes
Status: General Superseded
Critical:
No (superseded patches were critical)
PHKL_7378: PANIC
PHKL_6643: PANIC
Panic occurs only when using an unsupported device
Path Name: /hp-ux_patches/s700/10.X/PHKL_8753
Symptoms:
PHKL_8753:
Fixes a bug with Exabyte tape drives that caused append
writes (those not at BOT) to be in non-compressed mode
when using the BEST density setting.
PHKL_8504:
This patch changes the behavior of the open() call with
a write protected tape. The open() will now fail with EIO
if the mode is not O_RDONLY.
PHKL_7882:
Without immediate reporting enabled a DLT tape drive will
take several seconds for each filemark written. If a user
application is writing many filemarks to a tape the
performance will be poor. This patch enables immediate
reporting of filemarks, which should improve performance
for an application that writes many filemarks to a tape.
PHKL_7378:
Fixes a problem with a panic caused by use of non-supported
Exabyte tape drives.
Adds support for Quantum DLT-2000, DLT-4000, and DLT-6000
tape drives.
PHKL_6643:
The system will panic if an access is made to an Exabyte
tape drive other than those models that are officially
supported.
Defect Description:
PHKL_8753:
The Exabyte bug can be reproduced by writing a large
(100 Mb) file to an Exabyte drive using the 'BEST' device
file in 'no rewind' mode, then writing the same file again
to the same device. The first write will be substantially
faster because it is compressed while following writes are
not compressed.
PHKL_8504:
Before this patch the open() call did not look at media
write protection. A write() to a write protected tape
would fail, but an open() with FWRITE mode would succeed.
This change was made to make the GSC driver behave the same
as the NIO driver.
PHKL_7882:
A flag in the driver indicates, for each device type,
whether or not immediate reporting should be enabled for
filemarks. That flag was not being set for DLT drives.
To reproduce, write a short C program that
writes 20 blocks of 1K bytes, each separated by a filemark.
Performance will be substantially better with this patch
applied.
PHKL_7378:
System would panic with any access to a non-supported
Exabyte tape drive.
PHKL_6643:
If a drive was found that had a manufacturer of Exabyte but
was not one of the supported drives the product name got
set to NULL. Dereferencing this NULL pointer later on
caused a system panic.
SR:
1653148098 4701320580 4701320606 4701329417 4701342089
5003329078
Patch Files:
/usr/conf/h/mtio.h
/usr/conf/lib/libhp-ux.a(scsi_tape.o)
/usr/include/sys/mtio.h
what(1) Output:
/usr/conf/h/mtio.h:
mtio.h $Date: 97/01/20 10:07:51 $ $Revision: 1.23.89
.13 $ PATCH_10.10 (PHKL_8753)
/usr/conf/lib/libhp-ux.a(scsi_tape.o):
scsi_tape.c $Date: 96/12/20 15:17:36 $ $Revision: 1.
3.89.17 $ PATCH_10.10 (PHKL_8753)
/usr/include/sys/mtio.h:
mtio.h $Date: 97/01/20 10:07:51 $ $Revision: 1.23.89
.13 $ PATCH_10.10 (PHKL_8753)
cksum(1) Output:
1968850153 25660 /usr/conf/h/mtio.h
462229135 59756 /usr/conf/lib/libhp-ux.a(scsi_tape.o)
1968850153 25660 /usr/include/sys/mtio.h
Patch Conflicts: None
Patch Dependencies: None
Hardware Dependencies: None
Other Dependencies: None
Supersedes:
PHKL_6643 PHKL_7378 PHKL_7882 PHKL_8504
Equivalent Patches:
PHKL_8754:
s800: 10.10
PHKL_8755:
s700: 10.20
PHKL_8756:
s800: 10.20
Patch Package Size: 170 Kbytes
Installation Instructions:
Please review all instructions and the Hewlett-Packard
SupportLine User Guide or your Hewlett-Packard support terms
and conditions for precautions, scope of license,
restrictions, and, limitation of liability and warranties,
before installing this patch.
------------------------------------------------------------
1. Back up your system before installing a patch.
2. Login as root.
3. Copy the patch to the /tmp directory.
4. Move to the /tmp directory and unshar the patch:
cd /tmp
sh PHKL_8753
5a. For a standalone system, run swinstall to install the
patch:
swinstall -x autoreboot=true -x match_target=true \
-s /tmp/PHKL_8753.depot
5b. For a homogeneous NFS Diskless cluster run swcluster on the
server to install the patch on the server and the clients:
swcluster -i -b
This will invoke swcluster in the interactive mode and
force all clients to be shut down.
WARNING: All cluster clients must be shut down prior to the
patch installation. Installing the patch while the
clients are booted is unsupported and can lead to
serious problems.
The swcluster command will invoke an swinstall session in which
you must specify:
alternate root path - default is /export/shared_root/OS_700
source depot path - /tmp/PHKL_8753.depot
To complete the installation, select the patch by choosing
"Actions -> Match What Target Has" and then "Actions -> Install"
from the Menubar.
5c. For a heterogeneous NFS Diskless cluster:
- run swinstall on the server as in step 5a to install
the patch on the cluster server.
- run swcluster on the server as in step 5b to install
the patch on the cluster clients.
By default swinstall will archive the original software in
/var/adm/sw/patch/PHKL_8753. If you do not wish to retain a
copy of the original software, you can create an empty file
named /var/adm/sw/patch/PATCH_NOSAVE.
Warning: If this file exists when a patch is installed, the
patch cannot be deinstalled. Please be careful
when using this feature.
It is recommended that you move the PHKL_8753.text file to
/var/adm/sw/patch for future reference.
To put this patch on a magnetic tape and install from the
tape drive, use the command:
dd if=/tmp/PHKL_8753.depot of=/dev/rmt/0m bs=2k
Special Installation Instructions: None