As your Mac data is actually stored in the hard drive, if you want to figure out the actual causes of the Mac data loss, you have to start from your Mac hard drive. This article will introduce the reasons from 4 perspectives.
Like Windows-based computers, Mac computer can suffer data loss as well. Thus, to prevent painful data loss on your Mac, you should make a regular data backup for your Mac data. For instance, if you attach great importance to your PST data, you can back up your PST files to an external hard drive, such that you’ll be able to get back your PST data from backups after PST damage.
If you have no backups and encounter unanticipated Mac data loss, you will make efforts to attempt Mac data recovery definitely. In prior to taking actions, you had better find out the actual causes of your Mac data loss. Here we will reveal the 4 most common reasons for Mac data loss.
1. Physical Issues
Actually, Mac hard drive is physically identical to the hard drive in the common Windows-based computers. The unique physical difference between them is that a Mac hard drive is attached with a tiny temperature sensor. Even so, a Mac hard drive is susceptible to physical damages, such as water damage, heavy drop and so on, which can lead to drive heads crash and spindle motor failures, etc. Once your Mac hard drive is subjected to physical damage, your Mac data will surely get inaccessible.
2. Electronic Issues
Mac hard drive is vulnerable to power failures. Therefore, if your Mac frequently suffers power outages or surges, the electronic components within the hard drive will tend to die, particularly for those Mac hard drives that aren’t produced by the original manufacturers. So-called electronic failures generally include the issues involving micro-controller chip, inductor or transient voltage suppressor.
3. Logical Issues
As the majority of Mac hard drives are using Hierarchical File System (HFS) file system, which is faster and relatively more efficient than other file system. But it also has its own downsides and vulnerabilities. The followings are the 3 common issues with HFS file system, which can lead to Mac data loss.
1) Catalog File Corruption
As its name suggests, the catalog files are storing the records for all files and their directory on the volume. Hence, its role is actually similar to the Master File Table on NTFS file system. The catalog file usually contains four node types. They’re the head nodes, leaf nodes, and index and map nodes respectively. All of them are indispensable in managing and organizing your Mac data. If any of the four nodes gets lost or compromised, your data will be unavailable.
2) Journal File Corruption
The Hierarchical File System (HFS) is actually a journaled file system. So-called journal files are responsible for storing the information about the working state of the Mac hard drive. This kind of files is considerably important. For instance, if your Mac computer suddenly shuts down, when you restart your Mac, the journal files will help you restore your Mac file system to the last state before the abrupt shutdown. In this restoring course, if the journal file gets corrupt, the Mac hard drive will go corrupt too and meanwhile your Mac data will be inaccessible.
3) Failures in Resizing Volumes
You can adjust the size of a partition on your Mac hard drive by resizing volume, no matter expanding or narrowing. However, during the volume resizing, the HFS file system is blazing vulnerable. If this process gets interrupted or botched for some reasons, you will suffer partition loss. At that time, of course the data on the lost partition will vanish likewise.
4. Accidental Human Errors
Last but not least, you can encounter Mac data loss due to your own mistakes. It is totally same as data loss on other kinds of data storage devices. For example, you may delete some files by accident, or format your Mac hard drive mistakenly, or your Mac computer gets lost or stolen unfortunately. All of these are from your own carelessness. In a nutshell, you should keep taking good care of your Mac all the time.
Shirley Zhang is a data recovery expert in DataNumen, Inc., which is the world leader in data recovery technologies, including corrupted sql and outlook repair software products. For more information visit www.datanumen.com