[linux-lvm] Replace Drive in RAID6
Adam Puleo
adam.puleo at icloud.com
Mon Nov 8 07:06:31 UTC 2021
Hello Everyone,
Since the sub-LV #0 has errored, LVM will not let me activate the logical volume.
Is there a way to remap the #0 sub-LV to the replaced disk or resizing the RAID6 to one less disk?
Thank you,
-Adam
On Nov 4, 2021, at 7:21 PM, Adam Puleo <adam.puleo at icloud.com> wrote:
Hello Andreas,
After deactivating each of the individual rmage and rmeta volumes I receive this error:
# lvchange -a y --activationmode degraded vg_data/lv_data
device-mapper: reload ioctl on (253:12) failed: Invalid argument
In messages I see the following errors:
Nov 4 19:19:43 nas kernel: device-mapper: raid: Failed to read superblock of device at position 0
Nov 4 19:19:43 nas kernel: device-mapper: raid: New device injected into existing raid set without 'delta_disks' or 'rebuild' parameter specified
Nov 4 19:19:43 nas kernel: device-mapper: table: 253:12: raid: Unable to assemble array: Invalid superblocks
Nov 4 19:19:43 nas kernel: device-mapper: ioctl: error adding target to table
Am I not adding the new drive to the RAID correctly? I first did a pvcreate and then a vgextend.
I was using the —rebuild option because I know which physical drive is bad. In the lvmraid man page it says —repair might not know which is the correct block to use so to use —rebuild.
Thank you,
-Adam
On Nov 3, 2021, at 7:25 AM, Andreas Schrägle <linux-lvm at ajs124.de> wrote:
On Tue, 2 Nov 2021 22:56:18 -0700
Adam Puleo <adam.puleo at icloud.com> wrote:
> Hello,
>
> One of my drives failed in my RAID6 and I’m trying to replace it without success.
>
> I’m trying to rebuild the failed drive (/dev/sda): lvchange --rebuild /dev/sda vg_data
>
> But I’m receiving the error: vg_data/lv_data must be active to perform this operation.
>
> I have tried to activate the logical volume without success.
>
> How do I go about activating the volume so that I can rebuild the failed drive?
>
> Thanks,
> -Adam
>
> # lvs -a -o name,segtype,devices
> LV Type Devices
> lv_data raid6 lv_data_rimage_0(0),lv_data_rimage_1(0),lv_data_rimage_2(0),lv_data_rimage_3(0),lv_data_rimage_4(0)
> [lv_data_rimage_0] error
> [lv_data_rimage_1] linear /dev/sdc1(1)
> [lv_data_rimage_2] linear /dev/sdb1(1)
> [lv_data_rimage_3] linear /dev/sdf1(1)
> [lv_data_rimage_4] linear /dev/sde1(2)
> [lv_data_rmeta_0] error
> [lv_data_rmeta_1] linear /dev/sdc1(0)
> [lv_data_rmeta_2] linear /dev/sdb1(0)
> [lv_data_rmeta_3] linear /dev/sdf1(0)
> [lv_data_rmeta_4] linear /dev/sde1(0)
>
> # lvs -a
> LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
> lv_data vg_data rwi---r--- 990.00g
> [lv_data_rimage_0] vg_data vwi-a-r-r- 330.00g
> [lv_data_rimage_1] vg_data Iwi-a-r-r- 330.00g
> [lv_data_rimage_2] vg_data Iwi-a-r-r- 330.00g
> [lv_data_rimage_3] vg_data Iwi-a-r-r- 330.00g
> [lv_data_rimage_4] vg_data Iwi-a-r-r- 330.00g
> [lv_data_rmeta_0] vg_data ewi-a-r-r- 4.00m
> [lv_data_rmeta_1] vg_data ewi-a-r-r- 4.00m
> [lv_data_rmeta_2] vg_data ewi-a-r-r- 4.00m
> [lv_data_rmeta_3] vg_data ewi-a-r-r- 4.00m
> [lv_data_rmeta_4] vg_data ewi-a-r-r- 4.00m
>
>
>
> _______________________________________________
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> linux-lvm at redhat.com
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> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
Hello Adam,
how exactly have you tried to activate the LV so far?
lvchange with --activationmode degraded should work, no?
Also, are you sure that --rebuild is the correct operation?
man 7 lvmraid suggest you might want --repair or --replace instead.
Best Regards
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