TITLE: Tru64 UNIX directIO inconsistent data fix Copyright (c) Compaq Computer Corporation 2002. All rights reserved. New Kit Date: 31-MAY-2002 Modification Date: Not Applicable Modification Type: New Kit PRODUCT: Tru64 UNIX [R] 5.1A SOURCE: Compaq Computer Corporation ECO INFORMATION: ECO Name: T64V51AB2-C0030800-14434-E-20020529.tar ECO Kit Approximate Size: 2.5MB Kit Applies To: Tru64 UNIX 5.1A PK2 (BL2) ECO Kit CHECKSUMS: /usr/bin/sum results: 39166 2400 /usr/bin/cksum results: 3029553458 2457600 MD5 results: 12d61662250f5669ba857a5a9a9c6bdf SHA1 results: 78f249d0a8dfae00cb8dce8c3422ae37bbac5466 ECO KIT SUMMARY: A dupatch-based, Early Release Patch kit exists for Tru64 UNIX 5.1A that contains solutions to the following problem(s): When a file is opened in an AdvFS filesystem for directIO, and there are several concurrent writers to the same AdvFS page (writes must be < 8k in size or not page-aligned), and the underlying AdvFS page is already in the UBC cache, the updates are not correctly serialized and one or more of the updates may be lost. This patch fixes this condition. On Tru64 UNIX 5.1A there is a potential loss of updated data in files opened for directIO when writing in increments smaller than 8k. The Patch Kit Installation Instructions and the Patch Summary and Release Notes documents provide patch kit installation and removal instructions and a summary of each patch. Please read these documents prior to installing patches on your system. The patches in this ERP kit will also be available in the next mainstream patch kit - Tru64 UNIX 5.1A Patch Kit 3. INSTALLATION NOTES: Install this kit with the dupatch utility that is included in the patch kit. You may need to baseline your system if you have manually changed system files on your system. The dupatch utility provides the baselining capability. INSTALLATION PREREQUISITES: You must have installed Tru64 UNIX 5.1A PK2 (BL2) prior to installing this Early Release Patch Kit. KNOWN PROBLEMS WITH THE PATCH KIT: None. RELEASE NOTES FOR T64V51AB2-C0030800-14434-E-20020529.tar: 1 Release Notes This Early Release Patch Kit Distribution contains: - fixes that resolve the problem(s) reported in: o 93376 BCGM50847 * for Tru64 UNIX V5.1A T64V51AB02AS0002-20020405.tar (BL2) * for Tru64 UNIX V5.1A T64V51AB02AS0002-20020513.tar (BL2) The patches in this kit are being released early for general customer use. Refer to the Release Notes for a summary of each patch and installation prerequisites. Patches in this kit are installed by running dupatch from the directory in which the kit was untarred. For example, as root on the target system: > mkdir -p /tmp/CSPkit1 > cd /tmp/CSPkit1 > > tar -xpvf DUV40D13-C0044900-1285-20000328.tar > cd patch_kit > ./dupatch 2 Special Instructions There are no special instructions for Tru64 UNIX V5.1A Patch C308.00 3 Summary of CSPatches contained in this kit Tru64 UNIX V5.1A PatchId Summary Of Fix ---------------------------------------- C308.00 Fix directIO pwrite/pread inconsistent data 4 Additional information from Engineering None 5 Affected system files This patch delivers the following files: Tru64 UNIX V5.1A Patch C308.00 ./sys/BINARY/advfs.mod CHECKSUM: 08456 1310 SUBSET: OSFADVFSBIN520 [R] UNIX is a registered trademark in the United States and other countries licensed exclusively through X/Open Company Limited. Copyright Compaq Computer Corporation 2002. All Rights reserved. This software is proprietary to and embodies the confidential technology of Compaq Computer Corporation. Possession, use, or copying of this software and media is authorized only pursuant to a valid written license from Compaq or an authorized sublicensor. This ECO has not been through an exhaustive field test process. Due to the experimental stage of this ECO/workaround, Compaq makes no representations regarding its use or performance. The customer shall have the sole responsibility for adequate protection and back-up data used in conjunction with this ECO/workaround.