F5F Stay Refreshed Software Operating Systems The size of the allocation unit does impact performance, but its effect depends on the context and system requirements.

The size of the allocation unit does impact performance, but its effect depends on the context and system requirements.

The size of the allocation unit does impact performance, but its effect depends on the context and system requirements.

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AapenStaartje
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03-18-2016, 02:14 AM
#1
I’m working on improving my older, slower PC which spins at an astonishing 54,000 RPM. During optimization, I checked the allocation unit size for each partition. I’m wondering if making the units larger could boost performance. Does expanding the size really help the file system? And what about the trade-off—would I lose storage space in the process? Is this worth it?
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A
AapenStaartje
03-18-2016, 02:14 AM #1

I’m working on improving my older, slower PC which spins at an astonishing 54,000 RPM. During optimization, I checked the allocation unit size for each partition. I’m wondering if making the units larger could boost performance. Does expanding the size really help the file system? And what about the trade-off—would I lose storage space in the process? Is this worth it?

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DerpyLOL
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03-30-2016, 05:58 AM
#2
Assume a modern setup with a 4096 MB drive, though earlier systems used smaller defaults. This explains why you needed a larger partition layout for older Windows XP versions.
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DerpyLOL
03-30-2016, 05:58 AM #2

Assume a modern setup with a 4096 MB drive, though earlier systems used smaller defaults. This explains why you needed a larger partition layout for older Windows XP versions.

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Nani100
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03-31-2016, 04:41 PM
#3
In theory, as files grow larger, each one occupies fewer blocks, which means less need to monitor block usage—though this impact is negligible. However, it will decrease the amount of usable storage.
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Nani100
03-31-2016, 04:41 PM #3

In theory, as files grow larger, each one occupies fewer blocks, which means less need to monitor block usage—though this impact is negligible. However, it will decrease the amount of usable storage.

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Okwrighty
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04-02-2016, 02:58 AM
#4
The allocation unit size is mainly about saving space. When you have many tiny files but each must fit into fixed blocks—like 16K—you're losing up to 15K per file. In that scenario, a smaller block might be better. But if you mostly have a few huge files, then the extra space used for small blocks hurts the efficiency of the allocation table. It's a balance, and historically block sizes were picked based on what kinds of data you expected to keep. Operating systems usually suggest a smaller size for lots of small files, while video files benefit from larger blocks since you'll mainly store a few big ones.
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Okwrighty
04-02-2016, 02:58 AM #4

The allocation unit size is mainly about saving space. When you have many tiny files but each must fit into fixed blocks—like 16K—you're losing up to 15K per file. In that scenario, a smaller block might be better. But if you mostly have a few huge files, then the extra space used for small blocks hurts the efficiency of the allocation table. It's a balance, and historically block sizes were picked based on what kinds of data you expected to keep. Operating systems usually suggest a smaller size for lots of small files, while video files benefit from larger blocks since you'll mainly store a few big ones.

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Monkey_Mentor
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04-18-2016, 12:41 PM
#5
Regardless of the system's age, switch to an SSD.
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Monkey_Mentor
04-18-2016, 12:41 PM #5

Regardless of the system's age, switch to an SSD.

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Freaz_
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04-18-2016, 01:50 PM
#6
The system organizes file data efficiently. NTFS keeps metadata in small blocks, usually around 256 bytes each. When space fills up, it reserves extra room for details like timestamps and attributes. Instead of reserving a whole sector right away, it stores the info in this area until needed. Once enough space is used, a larger sector (like 512 bytes) is set aside to hold the actual file data. This improves performance by letting the drive move faster and reducing seek times. Optimizing file placement with tools helps organize files smartly, speeding up access.
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Freaz_
04-18-2016, 01:50 PM #6

The system organizes file data efficiently. NTFS keeps metadata in small blocks, usually around 256 bytes each. When space fills up, it reserves extra room for details like timestamps and attributes. Instead of reserving a whole sector right away, it stores the info in this area until needed. Once enough space is used, a larger sector (like 512 bytes) is set aside to hold the actual file data. This improves performance by letting the drive move faster and reducing seek times. Optimizing file placement with tools helps organize files smartly, speeding up access.

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