{"id":19746,"date":"2023-07-12T08:27:25","date_gmt":"2023-07-12T13:27:25","guid":{"rendered":"https:\/\/www.jasminedirectory.com\/blog\/?p=19746"},"modified":"2023-09-24T07:07:35","modified_gmt":"2023-09-24T12:07:35","slug":"setting-up-lvm-on-three-scsi-disks","status":"publish","type":"post","link":"https:\/\/www.jasminedirectory.com\/blog\/setting-up-lvm-on-three-scsi-disks\/","title":{"rendered":"Setting up LVM on three SCSI disks"},"content":{"rendered":"<p>For this recipe (Ubuntu 22.04 focal), the setup has three SCSI disks that will be put into a logical volume using LVM. The disks are at \/dev\/sda, \/dev\/sdb, and \/dev\/sdc (ignore the OS disk).<\/p>\n<pre>Disk \/dev\/nvme0n1: 1.76 TiB, 1920383410176 bytes, 3750748848 sectors\r\nDisk model: SAMSUNG MZQL21T9HCJR-00A07\r\nUnits: sectors of 1 * 512 = 512 bytes\r\nSector size (logical\/physical): 512 bytes \/ 4096 bytes\r\nI\/O size (minimum\/optimal): 131072 bytes \/ 131072 bytes\r\nDisklabel type: dos\r\nDisk identifier: 0x0edc49ab\r\n\r\nDevice Boot Start End Sectors Size Id Type\r\n\/dev\/nvme0n1p1 2048 8390655 8388608 4G 82 Linux swap \/ Solaris\r\n\/dev\/nvme0n1p2 8390656 10487807 2097152 1G 83 Linux\r\n\/dev\/nvme0n1p3 10487808 3750746799 3740258992 1.8T 83 Linux\r\n\r\nDisk \/dev\/sda: 7.28 TiB, 8001563222016 bytes, 15628053168 sectors\r\nDisk model: HGST HUH721008AL\r\nUnits: sectors of 1 * 512 = 512 bytes\r\nSector size (logical\/physical): 512 bytes \/ 4096 bytes\r\nI\/O size (minimum\/optimal): 4096 bytes \/ 4096 bytes\r\nDisklabel type: gpt\r\nDisk identifier: 5DDAA99D-057D-5A45-90FF-C9DC826FCE7D\r\n\r\nDisk \/dev\/sdb: 7.28 TiB, 8001563222016 bytes, 15628053168 sectors\r\nDisk model: HGST HUH721008AL\r\nUnits: sectors of 1 * 512 = 512 bytes\r\nSector size (logical\/physical): 512 bytes \/ 4096 bytes\r\nI\/O size (minimum\/optimal): 4096 bytes \/ 4096 bytes\r\nDisklabel type: gpt\r\nDisk identifier: 0A481C8C-79A2-0347-94EA-B2DF6361BF5F\r\n\r\nDisk \/dev\/sdc: 14.57 TiB, 16000900661248 bytes, 31251759104 sectors\r\nDisk model: ST16000NM003G-2K\r\nUnits: sectors of 1 * 512 = 512 bytes\r\nSector size (logical\/physical): 512 bytes \/ 4096 bytes\r\nI\/O size (minimum\/optimal): 4096 bytes \/ 4096 bytes\r\nDisklabel type: gpt\r\nDisk identifier: E1266E34-E31B-DF45-BC60-9D5565C11BC8<\/pre>\n<p>&nbsp;<\/p>\n<p>First, we need to clean the drives:<\/p>\n<pre>root@server ~ # wipefs -a \/dev\/sda\r\n\/dev\/sda: 8 bytes were erased at offset 0x00000200 (gpt): 45 46 49 20 50 41 52 54\r\n\/dev\/sda: 8 bytes were erased at offset 0x74702555e00 (gpt): 45 46 49 20 50 41 52 54\r\n\/dev\/sda: 2 bytes were erased at offset 0x000001fe (PMBR): 55 aa\r\n\/dev\/sda: calling ioctl to re-read partition table: Success\r\nroot@server ~ # wipefs -a \/dev\/sdb\r\n\/dev\/sdb: 8 bytes were erased at offset 0x00000200 (gpt): 45 46 49 20 50 41 52 54\r\n\/dev\/sdb: 8 bytes were erased at offset 0x74702555e00 (gpt): 45 46 49 20 50 41 52 54\r\n\/dev\/sdb: 2 bytes were erased at offset 0x000001fe (PMBR): 55 aa\r\n\/dev\/sdb: calling ioctl to re-read partition table: Success\r\nroot@server ~ # wipefs -a \/dev\/sdc\r\n\/dev\/sdc: 8 bytes were erased at offset 0x00000200 (gpt): 45 46 49 20 50 41 52 54\r\n\/dev\/sdc: 8 bytes were erased at offset 0xe8d7ffffe00 (gpt): 45 46 49 20 50 41 52 54\r\n\/dev\/sdc: 2 bytes were erased at offset 0x000001fe (PMBR): 55 aa\r\n\/dev\/sdc: calling ioctl to re-read partition table: Success<\/pre>\n<p>Now we can pvcreate:<\/p>\n<pre>root@server ~ # pvcreate \/dev\/sda\r\nPhysical volume \"\/dev\/sda\" successfully created.\r\nroot@server ~ # pvcreate \/dev\/sdb\r\nPhysical volume \"\/dev\/sdb\" successfully created.\r\nroot@server ~ # pvcreate \/dev\/sdc\r\nPhysical volume \"\/dev\/sdc\" successfully created.<\/pre>\n<p>pvs:<\/p>\n<pre>root@server ~ # pvs\r\nPV VG Fmt Attr PSize PFree\r\n\/dev\/sda lvm2 --- &lt;7.28t &lt;7.28t\r\n\/dev\/sdb lvm2 --- &lt;7.28t &lt;7.28t\r\n\/dev\/sdc lvm2 --- 14.55t 14.55t<\/pre>\n<p>Create a volume group<\/p>\n<pre>root@server ~ # vgcreate vg00 \/dev\/sda \/dev\/sdb \/dev\/sdc\r\nVolume group \"vg00\" successfully created\r\n\r\nroot@server ~ # vgdisplay vg00\r\n--- Volume group ---\r\nVG Name vg00\r\nSystem ID\r\nFormat lvm2\r\nMetadata Areas 3\r\nMetadata Sequence No 1\r\nVG Access read\/write\r\nVG Status resizable\r\nMAX LV 0\r\nCur LV 0\r\nOpen LV 0\r\nMax PV 0\r\nCur PV 3\r\nAct PV 3\r\nVG Size &lt;29.11 TiB\r\nPE Size 4.00 MiB\r\nTotal PE 7630353\r\nAlloc PE \/ Size 0 \/ 0\r\nFree PE \/ Size 7630353 \/ &lt;29.11 TiB\r\nVG UUID CTRQ1a-MlEv-bFZy-7Ph9-eo0Q-mEQU-BBCewT<\/pre>\n<p>Tt is time to create one or more logical volume on top of the volume group. I&#8217;ll create a 500GB volume for system backups, and the remaining space will be used to create a second volume for media files. The\u00a0<code>-n<\/code>\u00a0option is used to indicate a name for the LV, whereas\u00a0<code>-L<\/code>\u00a0sets a fixed size and\u00a0<code>-l<\/code>\u00a0(lowercase L) is used to indicate a percentage of the remaining space in the container VG.<\/p>\n<pre>root@server ~ # lvcreate -n vol_backups -L 500G vg00\r\nLogical volume \"vol_backups\" created.\r\nroot@server ~ # lvcreate -n vol_media -l 100%FREE vg00\r\nLogical volume \"vol_media\" created.<\/pre>\n<p>lvsdisply:<\/p>\n<pre>root@server ~ # lvdisplay\r\n--- Logical volume ---\r\nLV Path \/dev\/vg00\/vol_backups\r\nLV Name vol_backups\r\nVG Name vg00\r\nLV UUID 4ULTFr-JTum-tOXD-byLF-FvCz-UzwJ-UsGnfq\r\nLV Write Access read\/write\r\nLV Creation host, time server.darkq.net, 2023-05-10 17:15:43 +0200\r\nLV Status available\r\n# open 0\r\nLV Size 500.00 GiB\r\nCurrent LE 128000\r\nSegments 1\r\nAllocation inherit\r\nRead ahead sectors auto\r\n- currently set to 256\r\nBlock device 253:0\r\n\r\n--- Logical volume ---\r\nLV Path \/dev\/vg00\/vol_media\r\nLV Name vol_media\r\nVG Name vg00\r\nLV UUID FubLXZ-3fPe-A9fP-HYdl-eauq-vSsi-Ls3JJA\r\nLV Write Access read\/write\r\nLV Creation host, time server.darkq.net, 2023-05-10 17:17:23 +0200\r\nLV Status available\r\n# open 0\r\nLV Size &lt;28.62 TiB\r\nCurrent LE 7502353\r\nSegments 3\r\nAllocation inherit\r\nRead ahead sectors auto\r\n- currently set to 256\r\nBlock device 253:1<\/pre>\n<p>Now, let&#8217;s create the ext4 filesystems:<\/p>\n<pre>root@server ~ # mkfs.ext4 \/dev\/vg00\/vol_backups\r\nmke2fs 1.45.5 (07-Jan-2020)\r\nCreating filesystem with 131072000 4k blocks and 32768000 inodes\r\nFilesystem UUID: 9decc28e-dae7-469f-b1de-7d6da1fd5fb0\r\nSuperblock backups stored on blocks:\r\n32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,\r\n4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968,\r\n102400000\r\n\r\nAllocating group tables: done\r\nWriting inode tables: done\r\nCreating journal (262144 blocks): done\r\nWriting superblocks and filesystem accounting information: done\r\n\r\nroot@server ~ # mkfs.ext4 \/dev\/vg00\/vol_media\r\nmke2fs 1.45.5 (07-Jan-2020)\r\nCreating filesystem with 7682409472 4k blocks and 480151552 inodes\r\nFilesystem UUID: 5b262682-ba8e-4e03-98c2-c742ccebdff8\r\nSuperblock backups stored on blocks:\r\n32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,\r\n4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968,\r\n102400000, 214990848, 512000000, 550731776, 644972544, 1934917632,\r\n2560000000, 3855122432, 5804752896\r\n\r\nAllocating group tables: done\r\nWriting inode tables: done\r\nCreating journal (262144 blocks): done\r\nWriting superblocks and filesystem accounting information: done<\/pre>\n<p>In order to mount our new volumes, we have to create some identifiers:<\/p>\n<pre>root@server ~ # blkid \/dev\/vg00\/vol_backups\r\n\/dev\/vg00\/vol_backups: UUID=\"9decc28e-dae7-469f-b1de-7d6da1fd5fb0\" TYPE=\"ext4\"\r\nroot@server ~ # blkid \/dev\/vg00\/vol_media\r\n\/dev\/vg00\/vol_media: UUID=\"5b262682-ba8e-4e03-98c2-c742ccebdff8\" TYPE=\"ext4\"<\/pre>\n<p>Now, we can mount the volumes.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>For this recipe (Ubuntu 22.04 focal), the setup has three SCSI disks that will be put into a logical volume using LVM. The disks are at \/dev\/sda, \/dev\/sdb, and \/dev\/sdc (ignore the OS disk). Disk \/dev\/nvme0n1: 1.76 TiB, 1920383410176 bytes, 3750748848 sectors Disk model: SAMSUNG MZQL21T9HCJR-00A07 Units: sectors of 1 * 512 = 512 bytes [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1574,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[768],"tags":[769],"class_list":["post-19746","post","type-post","status-publish","format-standard","has-post-thumbnail","category-linux","tag-linux"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Setting up LVM on three SCSI disks<\/title>\n<meta name=\"description\" content=\"For this recipe (Ubuntu 22.04 focal), the setup has three SCSI disks that will be put into a logical volume using LVM. 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