Error Reading Vxfs File Change Log Superblock
SERVICES Services Overview Education Services Business Critical Services Consulting Services Managed Services Appliance Services CUSTOMER CENTER Customer Center Support Community MyVeritas Customer Success Licensing Programs Licensing Process ABOUT About Corporate Profile Corporate Leadership Newsroom Research Exchange Investor Relations Careers Legal Contact Us English 中文(简体) English Français Deutsch Italiano 日本語 한국어 Português Español USA Site: Veritas Veritas PartnerNet fsck intent-log replay operation is silently skipped. Instead fsck reports the intent-log replay operation as being successful and marks the superblock as clean, resulting in data corruption once the file system is mounted Article:000076563 Publish: Article URL:http://www.veritas.com/docs/000076563 Support / Article Sign In Remember me Forgot Password? Don't have a Veritas Account? Create a Veritas Account now! Welcome First Last Your Profile Logout Sign in to Subscribe Please sign in to set up your subscription. Close Sign In Print Article Products Article Languages Subscribe to this Article Manage your Subscriptions Problem Specific circumstances are required before VxFS can be exposed to this issue. For a file system to be exposed to this issue (where the fsck intent-log replay operation is silently skipped without warning or error) the file system must have been successfully cluster mounted (achieved only using the mount time option of "-o cluster") at some time since its creation and it must have been mounted locally (thus not cluster mounted) at the point in time when the system crashed. Therefore a file system that was previously cluster mounted would need to be used as a locally mounted file system to gain expose to this issue.In the event of a system crash and after the subsequent system boo
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by the VERITAS File System kernel. Each message is accompanied by an explanation and a suggestion on how to handle or correct the underlying problem. Most messages can appear in one of two forms. The first http://210.40.8.11:8457/ODM_FSadmin/fssag-11.html form applies to the file system in general. The second form is specific to the structural fileset within the file system. Messages of the second form contain the string (structural) to indicate that they occurred in the structural fileset. The following topics are covered in this chapter: File System Response to Problems Marking an Inode Bad Disabling Transactions Disabling the File System Recovering a Disabled File System Kernel Messages Global Message error reading IDs File System Response to Problems When the file system encounters problems, it responds in one of three ways: mark an inode bad disable transactions disable the file system Marking an Inode Bad Inodes can be marked bad if an inode update or a directory-block update fails. In these types of failures, the file system doesn't know what information is on the disk, and considers all the information that error reading vxfs it finds to be invalid. After an inode is marked bad, the kernel still permits access to the file name, but any attempt to access the data in the file or change the inode fails. Disabling Transactions If the file system detects an error while writing the intent log, it disables transactions. After transactions are disabled, the files in the file system can still be read or written, but no block or inode frees or allocations, structural changes, directory entry changes, or other changes to metadata are allowed. Disabling the File System If an error occurs that compromises the integrity of the file system, VxFS disables itself. If the intent log fails or an inode-list error occurs, the super-block is ordinarily updated (setting the VX_FULLFSCK flag) so that the next fsck does a full structural check. If this super-block update fails, any further changes to the file system can cause inconsistencies that are undetectable by the intent log replay. To avoid this situation, the file system disables itself. Recovering a Disabled File System When the file system is disabled, no data can be written to the disk. Although some minor file system operation still work, most simply return EIO. The only thing that can be done when the file system is disabled is to
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