Here is how to add a second disk to linux. In this article, the OS is CentOS 7.<\/p>\n
Check to see how many drives are installed: You can do this using the df and fdisk command:<\/p>\n
\n\n# df -h\nFilesystem Size Used Avail Use% Mounted on\n\/dev\/mapper\/centos_plesk-root 14G 3.9G 10G 29% \/\ndevtmpfs 910M 0 910M 0% \/dev\ntmpfs 920M 4.0K 920M 1% \/dev\/shm\ntmpfs 920M 8.6M 912M 1% \/run\ntmpfs 920M 0 920M 0% \/sys\/fs\/cgroup\n\/dev\/sda1 497M 215M 282M 44% \/boot\ntmpfs 184M 0 184M 0% \/run\/user\/1000\n\n<\/pre>\nThe above information show the primary disk as sda.<\/p>\n
Use fdisk to identify the second drive:<\/p>\n
\n\n# fdisk -l\n\nDisk \/dev\/sda: 17.2 GB, 17179869184 bytes, 33554432 sectors\nUnits = sectors of 1 * 512 = 512 bytes\nSector size (logical\/physical): 512 bytes \/ 512 bytes\nI\/O size (minimum\/optimal): 512 bytes \/ 512 bytes\nDisk label type: dos\nDisk identifier: 0x000ab095\n\n Device Boot Start End Blocks Id System\n\/dev\/sda1 * 2048 1026047 512000 83 Linux\n\/dev\/sda2 1026048 33554431 16264192 8e Linux LVM\n\nDisk \/dev\/sdb: 17.2 GB, 17179869184 bytes, 33554432 sectors\nUnits = sectors of 1 * 512 = 512 bytes\nSector size (logical\/physical): 512 bytes \/ 512 bytes\nI\/O size (minimum\/optimal): 512 bytes \/ 512 bytes\n\n<\/pre>\nThe sdb drive is the second drive and it has no information on the mount points.<\/p>\n
Now we can partition the drive. To partition the disk – \/dev\/sdb, enter:<\/p>\n
\n\n# fdisk \/dev\/sdb\n\n<\/pre>\nFor help using the partitioner, use the \u201cm\u201d command:<\/p>\n
\n\nCommand (m for help): m\nCommand action\n a toggle a bootable flag\n b edit bsd disklabel\n c toggle the dos compatibility flag\n d delete a partition\n l list known partition types\n m print this menu\n n add a new partition\n o create a new empty DOS partition table\n p print the partition table\n q quit without saving changes\n s create a new empty Sun disklabel\n t change a partition's system id\n u change display\/entry units\n v verify the partition table\n w write table to disk and exit\n x extra functionality (experts only)\n\nCommand (m for help): \n\n<\/pre>\npartitions using the command \u201cp\u201d:<\/p>\n
\n\nCommand (m for help): p\n\nDisk \/dev\/sdb: 50.0 GB, 50019202560 bytes\n255 heads, 63 sectors\/track, 6081 cylinders\nUnits = cylinders of 16065 * 512 = 8225280 bytes\n\n Device Boot Start End Blocks Id System\n\nCommand (m for help):\n\n<\/pre>\nTo create a new partition, issue the command \u201cn\u201d and then select \u201cp\u201d for primary and 1-4 depending on which partition on the drive this is (first, second, third, or fourth):<\/p>\n
n(creates a new partition)<\/p>\n
p(creates a primary partition)<\/p>\n
1(the number 1 denotes the partition will be \/dev\/sdb1)<\/p>\n
\n\nCommand (m for help): n\nCommand action\n e extended\n p primary partition (1-4)\np\nPartition number (1-4): 1\nFirst cylinder (1-6081, default 1): 1\nLast cylinder or +size or +sizeM or +sizeK (1-6081, default 6081): 6081\n\n\n<\/pre>\nTo save the partition, use the \u201cw\u201d command:<\/p>\n
\n\nCommand (m for help): w\n\n\nThe partition table has been altered!\n\nCalling ioctl() to re-read partition table.\nSyncing disks.\n<\/pre>\nNow we can check to see if the partition is there:<\/p>\n
\n# fdisk -l\n\nDisk \/dev\/sda: 17.2 GB, 17179869184 bytes, 33554432 sectors\nUnits = sectors of 1 * 512 = 512 bytes\nSector size (logical\/physical): 512 bytes \/ 512 bytes\nI\/O size (minimum\/optimal): 512 bytes \/ 512 bytes\nDisk label type: dos\nDisk identifier: 0x000ab095\n\n Device Boot Start End Blocks Id System\n\/dev\/sda1 * 2048 1026047 512000 83 Linux\n\/dev\/sda2 1026048 33554431 16264192 8e Linux LVM\n\nDisk \/dev\/sdb: 17.2 GB, 17179869184 bytes, 33554432 sectors\nUnits = sectors of 1 * 512 = 512 bytes\nSector size (logical\/physical): 512 bytes \/ 512 bytes\nI\/O size (minimum\/optimal): 512 bytes \/ 512 bytes\nDisk label type: dos\nDisk identifier: 0x884e64a3\n\n Device Boot Start End Blocks Id System\n\/dev\/sdb1 2048 33554431 16776192 83 Linux\n\n<\/pre>\nFormat the new disk using mkfs.ext3 command:<\/p>\n
To format Linux partions using ext3fs on the new disk, issue the following command:<\/p>\n
\n\n# mkfs.ext3 \/dev\/sdb1\n\n<\/pre>\nTo format Linux partions using ext4fs on the new disk, issue the following command:<\/p>\n
\n# mkfs.ext4 \/dev\/sdb1\n<\/pre>\nOutput (for using ext4):<\/p>\n
\n# mkfs.ext4 \/dev\/sdb1\nmke2fs 1.42.9 (28-Dec-2013)\nFilesystem label=\nOS type: Linux\nBlock size=4096 (log=2)\nFragment size=4096 (log=2)\nStride=0 blocks, Stripe width=0 blocks\n1048576 inodes, 4194048 blocks\n209702 blocks (5.00%) reserved for the super user\nFirst data block=0\nMaximum filesystem blocks=2151677952\n128 block groups\n32768 blocks per group, 32768 fragments per group\n8192 inodes per group\nSuperblock backups stored on blocks:\n 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,\n 4096000\n\nAllocating group tables: done\nWriting inode tables: done\nCreating journal (32768 blocks): done\nWriting superblocks and filesystem accounting information: done\n\n<\/pre>\nMount the new disk using the mount command. First, you’ll need to create a mount point. We’ll use \/disk2. This is where we’ll mount \/dev\/sdb1. Enter the following commands:<\/p>\n
\n\n# cd \/\n# mkdir disk2\n# mount \/dev\/sdb1 \/disk2\n# df -h\nFilesystem Size Used Avail Use% Mounted on\n\/dev\/mapper\/centos_plesk-root 14G 3.9G 10G 29% \/\ndevtmpfs 910M 0 910M 0% \/dev\ntmpfs 920M 4.0K 920M 1% \/dev\/shm\ntmpfs 920M 8.6M 912M 1% \/run\ntmpfs 920M 0 920M 0% \/sys\/fs\/cgroup\n\/dev\/sdb1 16G 47M 15G 1% \/disk2\n\/dev\/sda1 497M 215M 282M 44% \/boot\ntmpfs 184M 0 184M 0% \/run\/user\/0\n\n<\/pre>\nEdit \/etc\/fstab so the new drive will automatically mount to \/disk1 on reboot. Add the following:
\n\/dev\/sdb1 \/disk2 ext4 defaults 0 0<\/p>\n\n# nano \/etc\/fstab\n# Created by anaconda on Wed Dec 6 19:53:05 2017\n#\n# Accessible filesystems, by reference, are maintained under '\/dev\/disk'\n# See man pages fstab(5), findfs(8), mount(8) and\/or blkid(8) for more info\n#\n\/dev\/mapper\/centos_plesk-root \/ xfs defaults 0 0\nUUID=f9b133be-f059-45e2-a296-ccddb4cebe06 \/boot xfs defaults 0 0\n\/dev\/mapper\/centos_plesk-swap swap swap defaults 0 0\n\/dev\/sdb1 \/disk2 ext4 defaults 0 0\n\n<\/pre>\nMount the disk<\/p>\n
\n# mount -a\n\n<\/pre>\n","protected":false},"excerpt":{"rendered":"Here is how to add a second disk to linux. In this article, the OS is CentOS 7. Check to see how many drives are installed: You can do this using the df and fdisk command: # df -h Filesystem Size Used Avail Use% Mounted on \/dev\/mapper\/centos_plesk-root 14G 3.9G 10G 29% \/ devtmpfs 910M 0 … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-3816","post","type-post","status-publish","format-standard","hentry","category-administration"],"_links":{"self":[{"href":"https:\/\/www.qbytes.cloud\/index.php\/wp-json\/wp\/v2\/posts\/3816","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.qbytes.cloud\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.qbytes.cloud\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.qbytes.cloud\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.qbytes.cloud\/index.php\/wp-json\/wp\/v2\/comments?post=3816"}],"version-history":[{"count":0,"href":"https:\/\/www.qbytes.cloud\/index.php\/wp-json\/wp\/v2\/posts\/3816\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.qbytes.cloud\/index.php\/wp-json\/wp\/v2\/media?parent=3816"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.qbytes.cloud\/index.php\/wp-json\/wp\/v2\/categories?post=3816"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.qbytes.cloud\/index.php\/wp-json\/wp\/v2\/tags?post=3816"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}