Introduction

palign checks, if hard drive partitions are aligned optimally by logical block size and physical block size using bash.

Prerequisites

• The path /usr/local/bin/ exists in the ${PATH} variable:

$ echo "${PATH//:/\n}"

/home/ramon/bin
/usr/local/bin
/usr/bin
/bin
/usr/local/sbin
/usr/sbin
/sbin
/usr/local/games
/usr/games
/usr/lib/llvm/6/bin
/opt/bin

• sysfs is configured properly
  • /sys/block/<some_device_name>/queue/ and /sys/block/<some_device_name>/<some_device_partition_name>/ are accessable

Installation

Clone the repository into your current working directory:

$ git clone "https://codeberg.org/keks24/palign.git"

Copy all necessary files:

$ cd "palign/"
$ cp "usr/local/bin/palign" "/usr/local/bin/"
$ chmod 755 "/usr/local/bin/palign"

Usage

$ palign [device_name...]

Examples

$ palign
/dev/sda:
    /dev/sda1
        Start sector size (2048 Sectors, 1048576 Byte)
            Divided by 'Logical block size' (512 Byte):         4.000000 Sectors        Partition alignment optimal.
            Divided by 'Physical block size' (4096 Byte):       0.000000 Sectors        Partition not aligned!

$ palign sda sdb sdc sdd
/dev/sda:
    /dev/sda1
        Start sector size (2048 Sectors, 1048576 Byte)
            Divided by 'Logical block size' (512 Byte):         4.000000 Sectors        Partition alignment optimal.
            Divided by 'Physical block size' (4096 Byte):       0.000000 Sectors        Partition not aligned!

/dev/sdb:
    /dev/sdb1
        Start sector size (2048 Sectors, 1048576 Byte)
            Divided by 'Logical block size' (512 Byte):         4.000000 Sectors        Partition alignment optimal.
            Divided by 'Physical block size' (512 Byte):        4.000000 Sectors        Partition alignment optimal.
    /dev/sdb2
        Start sector size (20973568 Sectors, 10738466816 Byte)
            Divided by 'Logical block size' (512 Byte):         40964.000000 Sectors    Partition alignment optimal.
            Divided by 'Physical block size' (512 Byte):        40964.000000 Sectors    Partition alignment optimal.

/dev/sdc:
    /dev/sdc1
        Start sector size (2048 Sectors, 1048576 Byte)
            Divided by 'Logical block size' (512 Byte):         4.000000 Sectors        Partition alignment optimal.
            Divided by 'Physical block size' (512 Byte):        4.000000 Sectors        Partition alignment optimal.
    /dev/sdc2
        Start sector size (6144 Sectors, 3145728 Byte)
            Divided by 'Logical block size' (512 Byte):         12.000000 Sectors       Partition alignment optimal.
            Divided by 'Physical block size' (512 Byte):        12.000000 Sectors       Partition alignment optimal.
    /dev/sdc3
        Start sector size (268288 Sectors, 137363456 Byte)
            Divided by 'Logical block size' (512 Byte):         524.000000 Sectors      Partition alignment optimal.
            Divided by 'Physical block size' (512 Byte):        524.000000 Sectors      Partition alignment optimal.

/dev/sdd:
    /dev/sdd1
        Start sector size (40 Sectors, 20480 Byte)
            Divided by 'Logical block size' (512 Byte):         0.000000 Sectors        Partition not aligned!
            Divided by 'Physical block size' (512 Byte):        0.000000 Sectors        Partition not aligned!

Parameters

Multiple device names can be analysed.