Skip site navigation (1)Skip section navigation (2)
Date:      Sun, 10 Jan 1999 19:52:47 +1030
From:      Greg Lehey <grog@lemis.com>
To:        Dan Busarow <dan@dpcsys.com>
Cc:        "Michael G." <mikegoe@ibm.net>, "freebsd-questions@FreeBSD.ORG" <freebsd-questions@FreeBSD.ORG>
Subject:   Re: FreeBSD Cluster Size
Message-ID:  <19990110195247.X8886@freebie.lemis.com>
In-Reply-To: <Pine.BSF.3.96.990109223458.19191A-100000@java.dpcsys.com>; from Dan Busarow on Sat, Jan 09, 1999 at 10:37:38PM -0800
References:  <199901100629.GAA119060@out4.ibm.net> <Pine.BSF.3.96.990109223458.19191A-100000@java.dpcsys.com>

next in thread | previous in thread | raw e-mail | index | archive | help
On Saturday,  9 January 1999 at 22:37:38 -0800, Dan Busarow wrote:
> On Sun, 10 Jan 1999, Michael G. wrote:
>> By cluster I was using the minimum data storage size
>> measurement used by FAT-16, FAT-32, HPFS, and NTFS.  

Well, I suppose for those file systems it's the same.  But we only use
them for Microsoft compatibility.

>> i.e.  for a FAT-16 based drive the minimum cluster size is based on
>> the size of a FAT partition.  Now USF uses partitions to mean the
>> same thing..so I was looking for a cluster standard.
>
> I believe that a UFS fragment would correspond to a FAT cluster.
> The default value for fragments is 1024 bytes and is independent
> of the filesystem size.

It's dependent on the block size, though.  If you have a file system
with lots of small files, you can save by allocating 4 kB blocks and
512 byte frags.

Greg
--
See complete headers for address, home page and phone numbers
finger grog@lemis.com for PGP public key

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-questions" in the body of the message



Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?19990110195247.X8886>