Questions tagged [allocation-unit]
14 questions
21
votes
2 answers
What is the true meaning of the unit `kB` in `/proc/meminfo`?
I am freshly installing a distribution and want to set up a swap partition so that it is compatible with hibernate.
First, I must determine the amount of physical memory the system has.
$ grep MemTotal /proc/meminfo
MemTotal: 38740876 kB
Now as…
Jacob Birkett
- 431
7
votes
1 answer
Downsides of a small allocation unit size
Since I work in web development and bandwidth is always an issue, I make every effort to reduce the size of my files, especially images. As a result I have at least 10,000 files that are all around 200 bytes in size.
My hard drive's allocation unit…
7
votes
3 answers
Format USB Drive with FAT on Mac with different Allocation Unit Size
I've been asked to format a USB Drive with a larger Allocation Unit Size than the default. I'm using a Mac, Snow Leopard. In Disk Utility, I am unable to see anything to do with Allocation Unit Size. A bit of Googling suggests it might be called…
Kenny
- 288
3
votes
3 answers
File system "extents" and "clusters"
I'm trying to learn about HFS+ and it keeps referring to "extents."
Wikipedia
Fork Data Attribute records contain references to a maximum of eight
extents that can hold larger attributes. Extension Attributes are used
to extend a Fork Data…
rubixibuc
- 2,212
3
votes
1 answer
Using a 2048 kilobytes allocation unit size for large files
I have a Toshiba HDWA130 HDD that I am going to use to store exclusively files greater than 1GB.
I am going to format the disc with NTFS and use it only in Windows, connected via USB 3 (UASP).
My doubt: Any drawback in use an allocation unit size of…
Sprinter
- 33
3
votes
2 answers
3TB NTFS Volume Allocation Unit Size
Getting ready to deploy a 3TB to be used as shared backup and file storage for Windows 7/10 and Linux. I know I need to set it to GPT partition table, but what I'd the best cluster/allocation unit size? 4k is default but I know 1k and 2k would…
acejavelin
- 6,618
2
votes
2 answers
Could the allocation unit size on my backup drive cause it to run of space when used to backup my main drive?
I’m using two hard drives for conducting monthly backup for certain data in my PC.
However, I found out the folder the backup data inside my second hard drive has larger size on disk compare to the data in my first hard drive. This causes my second…
Axen Wong
- 21
1
vote
1 answer
Cannot select an allocation unit size less than 4096 bytes for 1 TB mechanical hard drive
I am trying to format a brand new 1TB Western Digital blue mechanical hard drive using Windows 7 Disk Management. It is not giving me the option to select an allocation unit size less than 4096 bytes, but on the two other mechanical hard drives that…
user76275
1
vote
1 answer
How to check allocation unit size on a hard drive on Ubuntu 12.04
How can I check on Ubuntu 12.04 allocation unit size on my hard drives?
Is there any simple way (as a terminal command), I've been searching for this info in Disk Utility, but couldn't find it.
venta7
- 11
1
vote
0 answers
Are there specific reasons to generally prefer large cluster sizes for SSDs?
I have recently bought two external drives:
20 TB hard disk from Seagate (STKP20000400).
4 TB SSD from Kingston (SXS4000G).
Both came pre-formatted with an exFAT file system. While the Seagate HDD came formatted with a cluster size of 256 kB,…
Daniel Saner
- 735
1
vote
1 answer
What is the difference between allocation unit size and sector size?
I have been given the following disk recommendation:
The disk drives should have standard native sector sizes of 512
bytes and 4 KB. Hard disks with sector sizes larger than 4 KB may
cause errors when attempting to store application data.
The…
variable
- 240
1
vote
1 answer
Set correctly size allocation unit
I have a SATA 320GB 16Mb cache hard drive running at 7,200RPM. I want to use it to store various .vdi virtual machines and access sporadically. I'm not going to do heavy tasks with them either, I'm not going to edit video :D.
I understand that, when…
SideTest
- 13
0
votes
1 answer
What is the best allocation unit size for a USB flash drive?
The USB flash driver in question is SanDisk Ultra Fit 128GB.
It'll be formatted as exFAT. Allocation units options range from 4k to 32M
What would be the best allocation units size if I were to use it to store exclusively ISOs?
More specifically OS…
SparkShredder
- 113
0
votes
0 answers
Why is the default allocation unit size smaller (2048 bytes) for exFAT than for NTFS (4096 bytes) when formatting a disk on Windows 7?
I see that the default allocation unit size is smaller for exFAT (2048 bytes) than for NTFS (4096 bytes) when formatting a disk on Windows 7 via Windows Explorer:
Why is the default allocation unit size smaller (2048 bytes) for exFAT than for NTFS…
Franck Dernoncourt
- 24,246
- 64
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