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Miksi kovalevy ei ole sen kokoinen mitä sen pitäisi olla?
Miksi kovalevy (HDD/SSD/M.2 jne.) ei ole sen kokoinen mitä sen pitäisi olla?
Olen ostanut 2Tt m.2 kovalevyn, mutta tietokoneeseen liitettyäni sen koko on vain 1,81Tt.
3 vastausta
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Kovalevyn koon laskentaan käytetään kahta eri tapaa. Käytännössä levyjen koko ilmoitetaan tasalukuna, esim. 2Tt, vaikka se todellisuudessa on noin 1,81Tt.
Voit olla huoleti, levysi on juuri sen kokoinen kuin pitää. Et ole joutunut huijatuksi. -
Hard drive capacity appears smaller due to differences in how manufacturers and computers calculate storage (decimal vs. binary) and space used by system files.
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If your hard drive isnt showing the size it should be, there are several possible explanations. Here are the most common reasons:
1. File System Overhead
When a hard drive is formatted, the file system (such as NTFS, FAT32, or exFAT) takes up a small portion of the drive. This space is used for system files, directory structures, and metadata that the file system needs to organize and manage the data. This overhead reduces the amount of usable storage space compared to the advertised size of the drive.
2. Binary vs. Decimal Measurement
Hard drive manufacturers often advertise storage in decimal terms, where 1 GB = 1,000,000,000 bytes. However, most operating systems, like Windows, calculate storage space in binary terms, where 1 GB = 1,073,741,824 bytes (1024 MB). This difference in calculation methods can lead to a discrepancy between the size displayed by your operating system and the size advertised by the manufacturer.
For example, a drive marketed as 500 GB (500,000,000,000 bytes) will show up as approximately 465 GB in your operating system because 500,000,000,000 ÷ 1,073,741,824 ? 465 GB.
3. Hidden or Unallocated Space
When you purchase a new hard drive, especially if it’s larger than the advertised size (e.g., several terabytes), the drive might have unallocated space that hasnt been formatted or assigned to a partition. This unallocated space won’t be visible or usable until you partition and format it.
4. System Reserved or Recovery Partitions
Many hard drives, especially those in pre-built systems or laptops, come with hidden partitions that are used for system recovery, boot management, or other system functions. These partitions might not be visible in the normal file explorer, but they still occupy space on the hard drive.
5. Bad Sectors
If there are bad sectors or physical damage on the hard drive, the operating system may mark certain areas of the disk as unusable, effectively reducing the available storage. In some cases, disk management tools can identify and map out bad sectors, leaving the rest of the drive usable, but this reduces the total usable capacity.
6. Pre-installed Software or Bloatware
On some devices, particularly from manufacturers, a portion of the storage space is used for pre-installed software, bloatware, or the operating system itself. This reduces the apparent storage size, even if it’s not explicitly mentioned in the device’s specifications.
7. Disk Formatting Issues
If the drive was previously used in another system or wasnt properly formatted, some file systems or partitions may not be fully compatible with your current system, leading to incorrect reporting of available space.
8. Drive Type (e.g., SSD vs. HDD)
Solid-state drives (SSDs) often have reserved over-provisioning space, which is used to help maintain the health and longevity of the drive. This over-provisioned area isn’t usable by the user and can reduce the overall usable storage capacity reported by the system.
Conclusion
There are several reasons why the actual size of a hard drive might appear smaller than expected. Most of these reasons are related to the way the storage is formatted, partitioned, and calculated. If youre seeing a significant discrepancy, its a good idea to check your drive’s partitioning, look for hidden system or recovery partitions, and verify that the operating system is reporting the storage correctly based on its own measurement system.
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