A Mac OS X hard drive can be divided into several volumes. These volumes work as individual drives and can be used to store different kinds of data and software. Every Mac volumes is made up of four general items: files, directories, file threads and directory threads. In order to define these items, Mac volumes store their records in form of the catalog file. The catalog file is stored in B-tree structure or formation. So for locating any file or directory, operating system needs to traverse entire catalog B-tree.
But in some cases, this tree or some of its nodes might get damaged. This situation renders all of your critical data inaccessible and require hard drive formatting to be resolved. The formatting removes stored data from hard drive and cause Mac data loss, which needs Mac Data Recovery to retrieve lost data. While accessing Mac OS X hard drive volumes, you might encounter the below error message: “Invalid B-tree node size" The above error occurs in HFS file system based Mac volumes, mac, while verifying the file system integrity with the help of Disk Utility.
The damaged volumes could not be repaired using Disk Utility. You encounter this error if the size of B-tree is incorrect. Total allowed size for HFS catalog file records is 512 bytes and for HFS+ catalog file records is 8 KB. In these circumstances, you need to find fix this problem by carrying out Data Recovery Mac. Resolution You can sort out this issue by following the underwritten steps: Disk Utility can not correct invalid node size problem, so use fsck in single user mode. Use third party hard drive repair applications after backing up your data.
When both of the above methods don't work, go for hard drive formatting. It corrects all of the hard drive related issues. Though, hard drive formatting is capable of resolving such issues, but it also deletes your critical data from hard drive and cause complete data loss. In such cases, Mac File Recovery software come for your rescue. These are advanced applications, which use efficient scanning procedures to thoroughly scan affected hard drive and retrieve all lost, missing and inaccessible data.
Mac Recovery tools are quite easy to use and thus do not demand sound technical skills. Stellar Phoenix Macintosh Data Recovery is the most effective solution for all Mac data loss situations. It retrieves lost files, directories, volumes and data from HFS, HFS+, HFSX, HFS Wrapper and FAT file system volumes. This software is compatible with Mac OS X 10.5, 10.4 and 10.3.9.
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