Systools Index

Storage

Moving partitions

        var
        (parted) mkpart primary ext4 57GiB 200GiB
        
        swap
        (parted) mkpart primary linux-swap 29GiB 57GiB
        
        home
        (parted) mkpart primary ext4 57GiB 200GiB
        
        srv
        (parted) mkpart primary ext4 200GiB 100%
        

Reboot into single-user mode where services aren't started and networking is offline.

        # init 1
        

Copy the data:

cp -apx /srv/* /mnt/srv

Rename directory, for later backup;

        mv /srv /srv.old
        mkdir /srv
        

Edit the /etc/fstabfile:

        # Server Data /srv
        UUID=6fadcb98-e442-4af7-a5f2-1ddb6100a8c4 /srv            ext4    defaults        0       2
        

Reboot in normal mode.

1.2. LVM

Read Raid Setup, the only thing you will need outside system is: "Patience, Pizza, and your favorite caffeinated beverage.". Arch Wiki article about Sofware RAID and LVM.

Basic idea behind RAID is to deal with independent disks as an array of drives. Raid 0 uses two or more disks as one, with performance gains without fault-tolerance. From raid 1 to 6 they offer diferent fault tolerance mechanisms.

LVM or Logic Volume Manager bring one more layer, read Lvm made easy. Partitions under lvm are easy to be resized, moved and there is a tool to help encrypt. There is more freedom to name physical disk names exp; production, development, backups...

Until now "from install" there is only one partition, it is good idea to have a system with diferent partitions for each propos. If is a "fresh install";

        # cd /iso/crux/opt/
        # pkgadd lvm2#2.02.107-1.pkg.tar.xz
        #
        

Multiple Partition

Create a LVM partition, fdisk should show something like this;

        # fdisk /dev/sdb

        Welcome to fdisk (util-linux 2.26.1).
        Changes will remain in memory only, until you decide to write them.
        Be careful before using the write command.


        Command (m for help): p
        Disk /dev/sdb: 232.9 GiB, 250059350016 bytes, 488397168 sectors
        Units: sectors of 1 * 512 = 512 bytes
        Sector size (logical/physical): 512 bytes / 512 bytes
        I/O size (minimum/optimal): 512 bytes / 512 bytes
        Disklabel type: gpt
        Disk identifier: E37FE96F-9845-45A4-B6DA-BF3F8E47511A

        Device     Start      End  Sectors  Size Type
        /dev/sdb1   2048     8056     6009    3M BIOS boot
        /dev/sdb2   8192 18440191 18432000  8.8G Linux filesystem

        Command (m for help):
        

I use defaults unless to define system partition last sector, where in this example is size, +80G

        Command (m for help): n
        Partition number (3-128, default 3):
        First sector (8057-488397134, default 18440192):
        Last sector, +sectors or +size{K,M,G,T,P} (18440192-488397134, default 488397134): +80G

        Created a new partition 3 of type 'Linux filesystem' and of size 80 GiB.

        Command (m for help):

        Command (m for help): t
        Partition number (1-3, default 3):
        Hex code (type L to list all codes): 23

        Changed type of partition 'Linux filesystem' to 'Linux LVM'.

        Command (m for help): n
        Partition number (4-128, default 4):
        First sector (8057-488397134, default 186212352):
        Last sector, +sectors or +size{K,M,G,T,P} (186212352-488397134, default 488397134):

        Created a new partition 4 of type 'Linux filesystem' and of size 144.1 GiB.

        Command (m for help): t
        Partition number (1-4, default 4):
        Hex code (type L to list all codes): 23

        Changed type of partition 'Linux filesystem' to 'Linux LVM'.

        Command (m for help): w
        The partition table has been altered.
        Calling ioctl() to re-read partition table.
        Syncing disks.

        #
        

Create Phisical Volume

         # pvcreate /dev/sdb3
          Physical volume "/dev/sdb3" successfully created
         #
         # pvcreate /dev/sdb4
          Physical volume "/dev/sdb4" successfully created
         #
        

Create Volume Group

        # vgcreate systemvg /dev/sdb3
          Volume group "systemvg" successfully created
        # vgcreate homevg /dev/sdb4
          Volume group "homevg" successfully created
        #
        

Create Logical Volume

        # lvcreate -L 15G -n distfileslv systemvg
          Logical volume "distfileslv" created.
        # lvcreate -L 8G -n packageslv systemvg
          Logical volume "packageslv" created.
        # lvcreate -L 4G -n swaplv systemvg
          Logical volume "swaplv" created.
        # lvcreate -L 80G -n homelv homevg
          Logical volume "homelv" created.
        #
        
        # mkfs.ext4 /dev/systemvg/distfileslv
        # mkfs.ext4 /dev/systemvg/packageslv
        # mkswap /dev/systemvg/swaplv
        # mkfs.ext4 /dev/homevg/homelv
        

Activate Deactivate

Deactivate logical volumes;

        # lvchange -a -n /dev/systemvg/packageslv
        # lvchange -a -n /dev/systemvg/distfileslv
        # swapoff /dev/systemvg/sawplv
        # lvchange -a -n /dev/systemvg/swaplv
        

Deactivate volume group;

         # vgchange -a n systemvg
         0 logical volume(s) in volume group "systemvg" now active
         #
        

Activate volume group;

        # vgchange -a y systemvg
          3 logical volume(s) in volume group "systemvg" now active
        #
        

Search Volume Groups

        # vgscan
          Reading all physical volumes.  This may take a while...
          Found volume group "homevg" using metadata type lvm2
          Found volume group "systemvg" using metadata type lvm2
        #
        

Reconfigure System

Start by mounting distfileslv and packageslv;

        # mkdir -p /var/ports/distfiles
        # mkdir -p /var/ports/packages
        # mkdir -p /var/ports/work
        # mkdir -p /var/ports/pkgbuild
        # chown -R pkgmk:pkgmk /var/ports
        #
        
        # vim /etc/pkgmk.conf

        # PKGMK_SOURCE_MIRRORS=()
        PKGMK_SOURCE_DIR="/var/ports/distfiles"
        PKGMK_PACKAGE_DIR="/var/ports/packages"
        PKGMK_WORK_DIR="/var/ports/work/$name
        

Edit /etc/prt-get.conf;

        ### log options:
        writelog enabled           # (enabled|disabled)
        logmode  overwrite         # (append|overwrite)
        rmlog_on_success yes       # (no|yes)
        logfile  /var/ports/pkgbuild/%n.log
        
        #
        # /etc/fstab: static file system information
        #
        #                                           

        UUID=49031e4e-f899-499d-ac83-401ad12635f5       /       ext4    defaults,errors=remount-ro,noatime      0 1

        #/dev/mapper/homevg-homelv:
        UUID=c3158626-de78-4bfa-ab8a-9e7e157eca88     /home   ext4    defaults,noatime        0 2

        #/dev/mapper/systemvg-distfileslv:
        UUID=0aba2d28-8e3a-4a89-bff5-1698708e13d0       /var/ports/distfiles      ext4 defaults,noatime   0 2
        #/dev/mapper/systemvg-packageslv:
        UUID=b5a38930-2827-4f00-809a-a0c4d5488aa8       /var/ports/packages       ext4 defaults,noatime   0 2

        #/dev/mapper/systemvg-swaplv:
        UUID=08295a67-a056-4dea-9462-209f151e4cdf       swap    swap    defaults        0 0
        devpts                 /dev/pts  devpts    noexec,nosuid,gid=tty,mode=0620  0      0
        tmp                   /tmp      tmpfs     defaults                         0      0
        shm                   /dev/shm  tmpfs     defaults                         0      0

        pkgmk /var/ports/work tmpfs size=1G,uid=100,defaults 0 0
        # End of file
        

You can move home directory to new one with just one command; "usermod -m -d /home/new user".

        # mount /var/ports/distfiles
        # mount /var/ports/packages
        # umount /home/pkgmk/work
        # mount /var/ports/work
        # mv /home/pkgmk/distfiles/* /var/ports/distfiles/
        # mv /home/pkgmk/packages/* /var/ports/packages/
        # rm -R /home/pkgmk
        # usermod -d /var/ports pkgmk
        

Check ownership, you may need recursive if partition has bin used on another system.

        # chown pkgmk:pkgmk /var/ports/distfiles
        # chown pkgmk:pkgmk /var/ports/packages
        #
        
        # mkdir /home/tmp
        # mount /dev/homevg/homelv /home/tmp
        # mv /home/user /home/tmp
        # umount /home/tmp
        # rmdir /home/tmp
        # rm -R /home/user
        

Maintenance

        # smartctl -t long /dev/sdb1
        # smartctl -a /dev/sdb1 | less
        

Non Destructive Test;

        # badblocks -nsv /dev/sdb1
        

Example gitolite volume

Lets create new lvm volume for repositories data;

        # lvcreate -L 15G -n gitlv homevg
          Logical volume "gitlv" created.

        # mkfs.ext4 /dev/homevg/gitlv
         mke2fs 1.42.12 (29-Aug-2014)
         Creating filesystem with 3932160 4k blocks and 983040 inodes
         Filesystem UUID: 54c7dca5-1558-4f90-8d81-c01e4e50c6ae
         Superblock backups stored on blocks:
                 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208

         Allocating group tables: done
         Writing inode tables: done
         Creating journal (32768 blocks): done
         Writing superblocks and filesystem accounting information: done

         #
        

Edit fstab

        UUID=54c7dca5-1558-4f90-8d81-c01e4e50c6ae       /srv/git                ext4 defaults,noatime   0 2
        

1.3. BTRFS

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This is part of the c9-doc Manual. Copyright (C) 2016 c9 team. See the file Gnu Free Documentation License for copying conditions.