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Full Discussion: Old disk disappear after additional new one on Linux FS
Top Forums UNIX for Beginners Questions & Answers Old disk disappear after additional new one on Linux FS Post 303045359 by kunwar on Wednesday 18th of March 2020 06:25:07 AM
Old 03-18-2020
Old disk disappear after additional new one on Linux FS
I want to increase the size of /testmount from 20GB to 320GB.

1. before
Code:
 
[root@testserver testmount]# df -h
Filesystem                                                                                  Size  Used Avail Use% Mounted on
...
/dev/sda3                                                                                    15G   10G  3.0G  74% /
/dev/sda1                                                                                   936M  191M  739M  20% /boot
/dev/sda2                                                                                    20G   15G  2.1G  93% /testmount
/dev/sda6                                                                                   6.8G   36M  6.5G   1% /tmp
...

2. Steps done to After partitioning /dev/sdb with 1 partition sdb1 with size of 300GB. i ran the below commands.


Code:
[root@testserver testmount]# mkfs -t ext4 /dev/sdb1

[root@testserver testmount]# mount /dev/sdb1 /testmount


3. After steps

Code:
 
[root@testserver testmount]# df -h
Filesystem                                                                                  Size  Used Avail Use% Mounted on
...
/dev/sda3                                                                                    16G   11G  4.0G  74% /
/dev/sda1                                                                                   976M  181M  729M  20% /boot
/dev/sdb1                                                                                   296G   65M  281G   1% /testmount                 <<<<<<< sda2 disappeared from /testmount 
/dev/sda6                                                                                   5.8G   36M  5.5G   1% /tmp
..

Why am I not able to see /dev/sda2 here?

What step am i missing? I am total newbie on Linux system admin matters. I looked at few tutorials, but didn't get the answer.
Last edited by rbatte1; 03-18-2020 at 09:54 AM..
 

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LEARN ABOUT MOJAVE

mkfs.minix

MKFS.MINIX(8)                                                  System Administration                                                 MKFS.MINIX(8)

NAME

       mkfs.minix - make a Minix filesystem

SYNOPSIS

       mkfs.minix [options] device [size-in-blocks]

DESCRIPTION

       mkfs.minix creates a Linux MINIX filesystem on a device (usually a disk partition).

       The device is usually of the following form:

              /dev/hda[1-8] (IDE disk 1)
              /dev/hdb[1-8] (IDE disk 2)
              /dev/sda[1-8] (SCSI disk 1)
              /dev/sdb[1-8] (SCSI disk 2)

       The device may be a block device or a image file of one, but this is not enforced.  Expect not much fun on a character device :-).

       The  size-in-blocks parameter is the desired size of the file system, in blocks.  It is present only for backwards compatibility.  If omit-
       ted the size will be determined automatically.  Only block counts strictly greater than 10 and strictly less than 65536 are allowed.

OPTIONS

       -c, --check
              Check the device for bad blocks before creating the filesystem.  If any are found, the count is printed.

       -n, --namelength length
              Specify the maximum length of filenames.  Currently, the only allowable values are 14 and 30 for file system versions 1 and 2.  Ver-
              sion 3 allows only value 60.  The default is 30.

       -i, --inodes number
              Specify the number of inodes for the filesystem.

       -l, --badblocks filename
              Read the list of bad blocks from filename.  The file has one bad-block number per line.  The count of bad blocks read is printed.

       -1     Make a Minix version 1 filesystem.  This is the default.

       -2, -v Make a Minix version 2 filesystem.

       -3     Make a Minix version 3 filesystem.

       -V, --version
              Display version information and exit.  The long option cannot be combined with other options.

       -h, --help
              Display help text and exit.

EXIT CODES

       The exit code returned by mkfs.minix is one of the following:

       0      No errors

       8      Operational error

       16     Usage or syntax error

SEE ALSO

       fsck(8), mkfs(8), reboot(8)

AVAILABILITY

       The mkfs.minix command is part of the util-linux package and is available from https://www.kernel.org/pub/linux/utils/util-linux/.

util-linux                                                           June 2015                                                       MKFS.MINIX(8)
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