Show pageOld revisionsBacklinksExport to PDFBack to top This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong. ====== Create partitions using CLI on linux ====== First and foremost: **!! WARNING !!** These commands are EXAMPLES. DELETING partitions, MODIFYING and FORMATTING filesystems destroys data and/or may prevent your machine from booting. Make backups. Use at own risk. Try on a machine you don't mind losing all data on. caveat admin. To quickly set up a drive up as a single ext4 partition... View detected devices of class "DISK" <code shell>lshw -C disk</code> View existing partition table(s) <code shell>fdisk -l</code> Edit the partition table for my chosen device (in this case, "sdx") <code shell>fdisk /dev/sdx</code> Within FDISK, press: <code> d ...to delete the current partition n ...to create a new partition p ...to specify it as a PRIMARY partition 1 ...to set it as the 1ST primary partition w ...to write the changes. </code> Display the new partition table: <code shell>fdisk -l</code> Format the new partition's filesystem as type ext4 <code shell>mkfs -t ext4 /dev/sdx1</code> Create a new directory where the new drive will mount into: <code shell> mkdir /storage mount /dev/sdx1 /storage </code> TUNING Remove reserved blocks (i.e. set to 0%), since this drive is just for user data <code shell>tune2fs -m 0 /dev/sdx1</code> Since server is on UPS, Set write-back so apps don't wait for actual disk writes <code shell>tune2fs -o journal_data_writeback /dev/sdx1</code> Mount at boot up using /etc/fstab and also set write-back policy <code shell>vi /etc/fstab</code> Find (or add) the relevant line in fstab for your drive. Parameters in fstab are separated by white space, for example the drive described above might appear as: <code shell>/dev/sdx1 /storage ext4 relatime,errors=remount-ro 0 1</code> * The first parameter identifies the partition (either by /dev/ or a long UUID); * The second parameter is the path the partition will be mounted to; * Third is the filesystem type; * The fourth parameter contains the options; * Fifth is the dump schedule for backups; and, * The sixth parameter is pass-number (used to control fsck order). Change the options (4th parameter) to: <code shell>noatime,nodiratime,data=writeback,barrier=0,nobh,errors=remount-ro</code> Reboot to check that everything went well. Remember these commands are destructive! Have backups and be careful! linux/shell_commands/fdisk.txt Last modified: 2019/10/31 09:05by 127.0.0.1