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  Install Windows 7 on 64k cluster size partition C:? 
 
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Hit Machine Mar 05, 2012, 11:01am EST Reply - Quote - Report Abuse
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How to install Windows 7 on 64k cluster size partition C:? Even if I convert the cluster size, the windows 7 cd doesn't identify the partition.

Windows xp recognizes the partition & gets installed on it during first phase but when laptop restarts during installation, message appears - Disk read error. Press ctrl + Alt + del to restart.

Can anyone please help that how to install windows in partition c: with 64K cluster size?


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BoT Mar 06, 2012, 12:11am EST Reply - Quote - Report Abuse
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>> Re: Install Windows 7 on 64k cluster size partition C:?
is this a raid drive? why is it 64k?

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Hit Machine Mar 06, 2012, 07:49am EST Reply - Quote - Report Abuse
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>> Re: Install Windows 7 on 64k cluster size partition C:?
I have read at many sites that if the cluster size in partition is increased from default of 4K, the disk performance increases. So I wanted to install windows on 64K cluster size partition.

john albrich Mar 06, 2012, 11:28am EST Reply - Quote - Report Abuse
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Edited: Mar 06, 2012, 12:21pm EST

 
>> Re: Install Windows 7 on 64k cluster size partition C:?
.
I think it's an Windows NTFS restriction.

My understanding is if you use Windows' NTFS, you're pretty much locked-in to a 4K boot partition cluster size. Some claim this is because Windows NTFS boot-up is hard-coded to a 4K size. From what I've seen that seems to be the case. Others say that some Windows background operations that access the boot partition will quickly corrupt if the cluster size is anything but 4K (e.g. some of the internal databases, etc).

I've read of attempts to "trick" the Windows NTFS OS into a different cluster size on the boot partition, but they seem dodgy to me. Examples:
Install on the default 4K cluster-size boot partition then backup and restore it onto a 32K cluster-size partition (I have not seen this work).
Create some kind of separate "sub-boot" partition where only a VERY small amount of "core" boot data are stored (supposedly about 50MB). Somehow the OS installation is divided between this "core" partition and a second standard definable partition. Maybe they were talking about using a specific boot manager? Memory is fuzzy on this one.
Replace a handful of OS files with older Windows OS files (yeah...that sounds smart:P)
Etc.

Like I said...dodgy. I quit messing with trying to change the boot partition cluster-size years ago. I'll try to do some up-to-date research when I'm feeling better.

That's one reason why I minimize the size of my Windows boot partition on mechanical HDDs. If I'm stuck with 4K clusters for the Windows NTFS OS itself, then to maximize performance in other areas, I want the system partition to be large enough to contain only the OS and its non-relocatable support files and allow for some expansion. For example, I make the boot partition (C disk) no larger than 40GB (can even be much less) and store everything else on different physical drives. On a current 1TB drive that 40GB partition is less than 5% of the drive, so to not waste a lot of the drive, use the remainder for low-access archive files only. I also often move many (but not all) OS paging/data/log/email/etc files to a different physical drive...although you have to be more flexible in your backup protocols when you do that. Many applications also by default store their data/log/temp files on the "C disk" (e.g. Office, browsers, etc) and some of them have a LOT of constant background activity on the drive...which affects OS performance. Those too often can be changed to different drives. My take is...in GENERAL...the less "crap" you put on the "C disk", and the less "other" activity you place on the physical drive containing the "C disk" the better the performance of the OS.

edit:
realized I meant to distinguish between physical drives and partitions
edit:
sorry about the numerous edits. I'm giving up for the day.

BoT Mar 06, 2012, 10:27pm EST Reply - Quote - Report Abuse
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>> Re: Install Windows 7 on 64k cluster size partition C:?
the performance gain by switching to a 64k cluster size is rather subject and depends a lot on all files stored and accessed on the hdd. for drives with large files like media and databases this can hold true but for drives with small files the change will not result in much performance gain. and even worse will occupy space that is then not available anymore.

if you have a drive with primarily 2-4k size files then each of these files will take up 64k which leave 60k unused and unavailable. also unrecoverable until the file is deleted.

http://www.ntfs.com/ntfs_optimization.htm

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