Patch Name: PHKL_10419 Patch Description: s700 10.10 HSC SCSI tape cumulative patch Creation Date: 97/04/08 Post Date: 97/04/11 Warning: 97/08/25 - This Critical Warning has been issued by HP. - This patch may silently corrupt one word of kernel stack resulting in a panic that is very difficult to trace back. - Although the memory dump seems to be complete normaly it may be written as all 0xffffffff's. - System having PHKL_10419 installed should be immediately updated with PHKL_11543 or its latest replacement. Hardware Platforms - OS Releases: s700: 10.10 Products: N/A Filesets: OS-Core.CORE-KRN ProgSupport.C-INC Automatic Reboot?: Yes Status: General Superseded With Warnings Critical: No (superseded patches were critical) PHKL_7378: PANIC PHKL_6643: PANIC Panic occurs only when using an unsupported device Path Name: /hp-ux_patches/s700/10.X/PHKL_10419 Symptoms: PHKL_10419: When reading a tape on a 7980S tape drive, reading a partial record fails and returns I/O Error. If a tape device receives a bus reset the device will rewind. Following this, when the device is closed, the driver will write EOF marks at the beginning of the tape causing the remaining data to be unusable. When a tape device is opened for write access and the media is write protected the driver returns I/O Error, which can be ambiguous. EPERM (Permission denied) is a more descriptive error. 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_10419: 7980S problem was caused by a change in the SCSI interface driver which caused the interface to negotiate for synchronous even when the driver had not enabled that negotiation. The 7980S drive is not SCSI-2 compliant, and has problems with synchronous negotiation in some places. Other changes were enhancements - no defect. 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 5003359489 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: 97/04/08 10:31:01 $ $Revision: 1. 3.89.20 $ PATCH_10.10 (PHKL_10419) /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 2522857934 67552 /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 PHKL_8753 Equivalent Patches: PHKL_10417: s700: 10.01 PHKL_10418: s800: 10.01 PHKL_10420: s800: 10.10 PHKL_10421: s700: 10.20 PHKL_10422: s800: 10.20 Patch Package Size: 150 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_10419 5a. For a standalone system, run swinstall to install the patch: swinstall -x autoreboot=true -x match_target=true \ -s /tmp/PHKL_10419.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_10419.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_10419. 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_10419.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_10419.depot of=/dev/rmt/0m bs=2k Special Installation Instructions: None