Re: lvconvert --type raid5 failure

Kernel: 6.1.0-18-amd64

LVM:

>  LVM version:     2.03.16(2) (2022-05-18)
>  Library version: 1.02.185 (2022-05-18)
>  Driver version:  4.47.0
>  Configuration:   ./configure --build=x86_64-linux-gnu --prefix=/usr 
> --includedir=${prefix}/include --mandir=${prefix}/share/man 
> --infodir=${prefix}/share/info --sysconfdir=/etc --localstatedir=/var 
> --disable-option-checking --disable-silent-rules 
> --libdir=${prefix}/lib/x86_64-linux-gnu --runstatedir=/run 
> --disable-maintainer-mode --disable-dependency-tracking 
> --libdir=/lib/x86_64-linux-gnu --sbindir=/sbin --w
> ith-usrlibdir=/usr/lib/x86_64-linux-gnu --with-optimisation=-O2 
> --with-cache=internal --with-device-uid=0 --with-device-gid=6 
> --with-device-mode=0660 --with-default-pid-dir=/run 
> --with-default-run-dir=/run/lvm 
> --with-default-locking-dir=/run/lock/lvm --with-thin=internal 
> --with-thin-check=/usr/sbin/thin_check 
> --with-thin-dump=/usr/sbin/thin_dump 
> --with-thin-repair=/usr/sbin/thin_repair --with-udev-prefix=/ --en
> able-applib --enable-blkid_wiping --enable-cmdlib --enable-dmeventd 
> --enable-editline --enable-lvmlockd-dlm --enable-lvmlockd-sanlock 
> --enable-lvmpolld --enable-notify-dbus --enable-pkgconfig 
> --enable-udev_rules --enable-udev_sync --disable-readline
>

W dniu 22.10.2024 o 17:26, Adam Niescierowicz pisze:
> Hi,
>
> I have LV type raid1 and after adding couple disk to VG I anted to 
> change raid1 to raid5 so I did:
>
> > # lvconvert --type raid5 /dev/first/lxc-owncloud-data-new
>
> it converted LV to RAID5 but didn't add new spare so:
>
> > # lvconvert --stripes 2 /dev/first/lxc-owncloud-data-new
>
> After this LV have 3 device but I didn't saw any sync action and 
> movement on the disk so to resync data I used:
>
> > # lvchange --resync /dev/first/lxc-owncloud-data-new
>
> It was like conversion from 6 to 12TB so after 40 hours when resync 
> was done I do mount and XFS complain about FS.
>
> What I did wrong?
> Is there a chance that I can recover data?
>
>
> From LVM Archive
>
>> # Orginal LV
>> lxc-owncloud-data-new {
>>     id = "4D3gRF-19uK-kCTX-DaYS-tmEx-Egs5-zRs7xp"
>>     status = ["READ", "WRITE", "VISIBLE"]
>>     flags = []
>>     creation_time = 1713726446  # 2024-04-21 21:07:26 +0200
>>     creation_host = "lxc4"
>>     segment_count = 1
>>
>>     segment1 {
>>         start_extent = 0
>>         extent_count = 1572864  # 6 Terabytes
>>
>>         type = "raid1"
>>         device_count = 2
>>         region_size = 8192
>>
>>         raids = [
>>             "lxc-owncloud-data-new_rmeta_0", 
>> "lxc-owncloud-data-new_rimage_0",
>>             "lxc-owncloud-data-new_rmeta_1", 
>> "lxc-owncloud-data-new_rimage_1"
>>         ]
>>     }
>> }
>>
>>
>> # After lvconvert --type raid5 /dev/first/lxc-owncloud-data-new
>> lxc-owncloud-data-new {
>>     id = "4D3gRF-19uK-kCTX-DaYS-tmEx-Egs5-zRs7xp"
>>     status = ["READ", "WRITE", "VISIBLE"]
>>     flags = []
>>     creation_time = 1713726446  # 2024-04-21 21:07:26 +0200
>>     creation_host = "lxc4"
>>     segment_count = 1
>>
>>     segment1 {
>>         start_extent = 0
>>         extent_count = 1572864  # 6 Terabytes
>>
>>         type = "raid5"
>>         device_count = 2
>>         region_size = 8192
>>         stripe_size = 128
>>
>>         raids = [
>>             "lxc-owncloud-data-new_rmeta_0", 
>> "lxc-owncloud-data-new_rimage_0",
>>             "lxc-owncloud-data-new_rmeta_1", 
>> "lxc-owncloud-data-new_rimage_1"
>>         ]
>>     }
>> }
>>
>>
>> # After lvconvert --stripes 2 /dev/first/lxc-owncloud-data-new
>> lxc-owncloud-data-new {
>>     id = "4D3gRF-19uK-kCTX-DaYS-tmEx-Egs5-zRs7xp"
>>     status = ["READ", "WRITE", "VISIBLE"]
>>     flags = []
>>     creation_time = 1713726446  # 2024-04-21 21:07:26 +0200
>>     creation_host = "lxc4"
>>     segment_count = 1
>>
>>     segment1 {
>>         start_extent = 0
>>         extent_count = 3145730  # 12 Terabytes
>>
>>         reshape_count = 1   # 4 Megabytes
>>         type = "raid5"
>>         device_count = 3
>>         region_size = 16384
>>         stripe_size = 128
>>
>>         raids = [
>>             "lxc-owncloud-data-new_rmeta_0", 
>> "lxc-owncloud-data-new_rimage_0",
>>             "lxc-owncloud-data-new_rmeta_1", 
>> "lxc-owncloud-data-new_rimage_1",
>>             "lxc-owncloud-data-new_rmeta_2", 
>> "lxc-owncloud-data-new_rimage_2"
>>         ]
>>     }
>> }
>>
>> # Didn't have progress of reshape in LVS
>>
>> lxc-owncloud-data-new {
>>     id = "4D3gRF-19uK-kCTX-DaYS-tmEx-Egs5-zRs7xp"
>>     status = ["READ", "WRITE", "VISIBLE"]
>>     flags = []
>>     creation_time = 1713726446  # 2024-04-21 21:07:26 +0200
>>     creation_host = "lxc4"
>>     segment_count = 1
>>
>>     segment1 {
>>         start_extent = 0
>>         extent_count = 3145728  # 12 Terabytes
>>
>>         type = "raid5"
>>         device_count = 3
>>         region_size = 16384
>>         stripe_size = 128
>>
>>         raids = [
>>             "lxc-owncloud-data-new_rmeta_0", 
>> "lxc-owncloud-data-new_rimage_0",
>>             "lxc-owncloud-data-new_rmeta_1", 
>> "lxc-owncloud-data-new_rimage_1",
>>             "lxc-owncloud-data-new_rmeta_2", 
>> "lxc-owncloud-data-new_rimage_2"
>>         ]
>>     }
>> }
>>
>> # lvchange --resync /dev/first/lxc-owncloud-data-new
>
>
-- 
---
Pozdrawiam
Adam Nieścierowicz

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