***************************************************************************** * Description: Knowledge of mounting disk with file system on Linux platform * Compatiablity: RDBMS 11g, 12c * Date: 05:45 PM EST, 06/01/2017 ***************************************************************************** Step 1 - First find the disk: | |__ $ dmesg | grep SCSI SCSI subsystem initialized Block layer SCSI generic (bsg) driver version 0.4 loaded (major 252) sd 1:0:1:0: [sdb] Attached SCSI disk sd 0:0:0:0: [sda] Attached SCSI disk sd 3:0:0:0: [sdc] Attached SCSI disk Step 2 - Partition the disk, make it a primary disk on partition 1, and create the partition: | |__ o. In some of Linux flavor, the disk name might be /dev/xvda or /dev/xvd* instead of sda. | |__ $ sudo fdisk /dev/sdc Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel Building a new DOS disklabel with disk identifier 0x1a79c16f. Changes will remain in memory only, until you decide to write them. After that, of course, the previous content won't be recoverable. Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite) The device presents a logical sector size that is smaller than the physical sector size. Aligning to a physical sector (or optimal I/O) size boundary is recommended, or performance may be impacted. WARNING: DOS-compatible mode is deprecated. It's strongly recommended to switch off the mode (command 'c') and change display units to sectors (command 'u'). Command (m for help): n Command action e extended p primary partition (1-4) Select (default p): p Partition number (1-4): 1 First cylinder (1-1305, default 1): Enter Using default value 1 Last cylinder, +cylinders or +size{K,M,G} (1-1305, default 1305): Enter Using default value 1305 Partition 1 of type Linux and of size 50 GiB is set Command (m for help): p Disk /dev/sdc: 10.7 GB, 10737418240 bytes 255 heads, 63 sectors/track, 1305 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x1a79c16f Device Boot Start End Blocks Id System /dev/sdc1 1 1305 10482381 83 Linux Partition 1 does not start on physical sector boundary. Command (m for help): w The partition table has been altered! Calling ioctl() to re-read partition table. Syncing disks. Step 3 - write a file system to the partition, specifying your filesystem type and the device name: | |__ $ sudo mkfs -t ext4 /dev/sdc1 [sudo] password for micore: mke2fs 1.43-WIP (20-Jun-2013) /dev/sdc1 alignment is offset by 512 bytes. This may result in very poor performance, (re)-partitioning suggested. Discarding device blocks: done Filesystem label= OS type: Linux Block size=4096 (log=2) Fragment size=4096 (log=2) Stride=0 blocks, Stripe width=0 blocks 655360 inodes, 2620595 blocks 131029 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=2684354560 80 block groups 32768 blocks per group, 32768 fragments per group 8192 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632 Allocating group tables: done Writing inode tables: done Creating journal (32768 blocks): done Writing superblocks and filesystem accounting information: done Step 4 - create a directory to mount the file system: | |__ $ sudo mkdir /data Step 5 - mount the directory: | |__ $ sudo mount /dev/sdc1 /data Step 6 - To ensure the drive is remounted automatically after a reboot it must be added to the /etc/fstab file. | UUID (Universally Unique IDentifier) is used in /etc/fstab to refer to the drive rather than just the device name. | If the OS detects a disk error during boot, using the UUID avoids the incorrect disk being mounted to a given location. | Remaining data disks would then be assigned those same device IDs. To find the UUID of the new drive: | |__ $ sudo -i blkid /dev/sda1: UUID="d1f02642-b6db-4238-b961-9ae23d28d6aa" TYPE="ext4" /dev/sda2: UUID="b27ff591-4fd9-4b83-a110-8bddf652c0ac" TYPE="ext4" /dev/sdb1: UUID="44969a92-1000-4447-9899-e4b064e55137" TYPE="ext4" /dev/sdc1: UUID="c6c30b15-f73b-4a22-bc35-0d01985be76f" TYPE="ext4" Step 7 - Recommend backing up the file system table in advanced: | |__ $ sudo cp /etc/fstab /etc/fstab.bkp Step 8 - Add the following line to the end of the /etc/fstab file: | |__ $ sudo vi /etc/fstab >> UUID=c6c30b15-f73b-4a22-bc35-0d01985be76f /data ext4 defaults,nofail 1 2 Reference: | |__ https://docs.microsoft.com/en-us/azure/virtual-machines/linux/add-disk?toc=%2fazure%2fvirtual-machines%2flinux%2ftoc.json
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