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Full Discussion: Partition Sizes
Top Forums UNIX for Beginners Questions & Answers Partition Sizes Post 303012277 by Stellaman1977 on Thursday 1st of February 2018 04:17:34 PM
Old 02-01-2018
Quote:
Originally Posted by hicksd8
Please explain.

Why would you possibly want to size a partition with byte accuracy? Are you short on disk space or something??

Anyway, normally, the disk sector is the smallest unit of currency so that's 512 bytes. Also, many OS's operate to the nearest disk cylinder.

Usually, if a filesystem fills up you are stuffed and need to expand it. Depending on what disk/filesystem you are running that could prove labor intensive unless you are running a OS that allows you to expand a filesystem easily. You normally need to leave good headroom to ensure the filesystem doesn't fill.
It has to do with my cloning efforts with
Code:
ufsrestore

and disk mirroring. I believe when creating a mirror, the slices have to be precise and I'm about to format a drive for it.
 

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PARTITION(8)						      System Manager's Manual						      PARTITION(8)

NAME
partition - make a partition table SYNOPSIS
partition [-mf] device [type:]size[+*] ... DESCRIPTION
Partition makes a partition table on device using the types and sizes given. It may be used in combination with repartition(8) for auto- matic installation of Minix. You may give up to four type:size[+*] specifications for the partitions. You may also specify holes before, between, and after the parti- tions. A hole differs from a partition specification by not having a type. The first hole is by default 1 sector to make space for the primary bootstrap and the partition table. The other holes are 0. The type field is the type of the partitition in hexadecimal. The size field is the partition's size in sectors. The + or * may option- ally be added to indicate that the partition must be expanded to contain any leftover space on the device or to mark the partition active. Partitions are padded out to cylinder boundaries, except for the first one, it starts on track 1. Some operating systems care about this. Minix and MS-DOS do not. OPTIONS
-m Minix only, no need to pad partitions. This is the default for subpartition tables. -f Force making a partition table even if the device is too small. EXAMPLE
partition /dev/hd0 01:16384 81:40000 81:2880* 06:20000+ Partitions disk 0 into an 8 Mb DOS partition, 20 Mb Minix /usr, 1.44 Mb Minix / (active), and a DOS partition of at least 10 Mb at the end of the disk. (06:0+ would have been ok too, it's just a sanity check.) SEE ALSO
hd(4), part(8), repartition(8). AUTHOR
Kees J. Bot (kjb@cs.vu.nl) PARTITION(8)
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