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I'm running ext4 over the logical volume over hardware |
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The steps I used to grow the logical volume are as follows: |
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1- I created a physical volume on the disk using pvcreate /dev/sda (the new disk became sda and the other ones offset to sd[bcd]) |
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doas pvs -a |
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PV VG Fmt Attr PSize PFree |
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/dev/sda vgraid lvm2 a-- <5.46t 0 |
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/dev/sdb vgraid lvm2 a-- <5.46t 0 |
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/dev/sdc vgraid lvm2 a-- <5.46t 0 |
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/dev/sdd vgraid lvm2 a-- <5.46t 0 |
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2- I added the PV to the volume group using vgextend vgraid /dev/sda |
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doas vgs -a |
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VG #PV #LV #SN Attr VSize VFree |
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vgraid 4 1 0 wz--n- 21.83t 0 |
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|
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3- I used the lvconvert command to add the PV to the LV lvconvert --stripes 3 /dev/vgraid/lvraid |
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doas lvs -a |
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lvraid vgraid rwi-aor--- 16.37t 100.00 |
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[lvraid_rimage_0] vgraid iwi-aor--- <5.46t |
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[lvraid_rimage_1] vgraid iwi-aor--- <5.46t |
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[lvraid_rimage_2] vgraid iwi-aor--- <5.46t |
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[lvraid_rimage_3] vgraid Iwi-aor--- <5.46t |
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[lvraid_rmeta_0] vgraid ewi-aor--- 4.00m |
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[lvraid_rmeta_1] vgraid ewi-aor--- 4.00m |
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[lvraid_rmeta_2] vgraid ewi-aor--- 4.00m |
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[lvraid_rmeta_3] vgraid ewi-aor--- 4.00m |
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|
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Now, if I remember this right, I ran the lvchange --syncaction check /dev/vgraid/lvraid |
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command, waited for almost a day for the sync to complete, then lvchange --rebuild /dev/sda /dev/vgraid/lvraid command. |
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|
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One strange thing I noticed is that the `blkid` command doesn't show my LV anymore, and I cannot mount it from fstab using the UUID. I can mount it using the device name, however (mount /dev/vgraid/lvraid /mnt/raid), and that works. |
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At this point, I am considering transfering all my data to another volume, and re-creating the RAID using mdadm. |
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Here's some more info on my VG and LV : |
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doas vgdisplay /dev/vgraid |
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--- Volume group --- |
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VG Name vgraid |
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System ID |
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Format lvm2 |
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Metadata Areas 4 |
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Metadata Sequence No 7 |
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VG Access read/write |
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VG Status resizable |
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MAX LV 0 |
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Cur LV 1 |
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Open LV 1 |
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Max PV 0 |
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Cur PV 4 |
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Act PV 4 |
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VG Size 21.83 TiB |
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PE Size 4.00 MiB |
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Total PE 5723164 |
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Alloc PE / Size 5723164 / 21.83 TiB |
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Free PE / Size 0 / 0 |
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VG UUID y8U06D-V0ZF-90MK-dhS6-szZf-7qzx-yErLF2 |
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|
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doas lvdisplay /dev/vgraid/lvraid |
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--- Logical volume --- |
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LV Path /dev/vgraid/lvraid |
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LV Name lvraid |
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VG Name vgraid |
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LV UUID 73wJt0-E6Ni-rujY-9tRm-QsoF-8FPy-3c10Rg |
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LV Write Access read/write |
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LV Creation host, time gentoo, 2021-12-02 10:12:48 -0500 |
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LV Status available |
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# open 1 |
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LV Size 16.37 TiB |
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Current LE 4292370 |
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Segments 1 |
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Allocation inherit |
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Read ahead sectors auto |
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- currently set to 1024 |
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Block device 253:8 |
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Julien |
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Feb 5, 2022, 14:09 by antlists@××××××××××××.uk: |
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|
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> On 05/02/2022 17:43, Julien Roy wrote: |
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> |
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>> Hello, |
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>> |
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>> I've been running an LVM RAID 5 on my home lab for a while, and recently it's been getting awfully close to 100% full, so I decided to buy a new drive to add to it, however, growing an LVM RAID is more complicated than I thought! I found very few documentation on how to do this, and settled on following some user's notes on the Arch Wiki [0]. I should've used mdadm !... |
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>> My RAID 5 consisted of 3x6TB drives giving me a total of 12TB of usable space. I am trying to grow it to 18TB now (4x6TB -1 for parity). |
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>> I seem to have done everything in order since I can see all 4 drives are used when I run the vgdisplay command, and lvdisplay tells me that there is 16.37TB of usable space in the logical volume. |
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>> In fact, running fdisk -l on the lv confirms this as well : |
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>> Disk /dev/vgraid/lvraid: 16.37 TiB |
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>> |
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> |
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> If you'd been running mdadm I'd have been able to help ... my setup is ext4 over lvm over md-raid over dm-integrity over hardware... |
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> |
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> But you've made no mention of lvgrow or whatever it's called. Not using lv-raid, I don't know whether you put ext straight on top of the raid, or do you need to grow the lv volume after you've grown the raid? I know I'd have to grow the volume. |
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> |
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> Cheers, |
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> Wol |
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> |
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