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LVM：向现有逻辑卷添加磁盘时出现问题

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LVM：向现有逻辑卷添加磁盘时出现问题

我在逻辑卷下有一个磁盘。

$ lvdisplay
  --- Logical volume ---
  LV Path                /dev/vg_prod/lv_prod
  LV Name                lv_prod
  VG Name                vg_prod
  LV UUID                mXj3Qv-t0GK-4idW-mRBA-17Nb-PSPK-Roulf3
  LV Write Access        read/write
  LV Status              available
  # open                 1
  LV Size                <3.64 TiB
  Current LE             953797
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:1

现在，我想添加一个新磁盘来扩展卷。该磁盘通过 USB 接口连接。

$ fdisk -l /dev/sdg
Disk /dev/sdg: 3.65 TiB, 4000752599040 bytes, 7813969920 sectors
Disk model: Game Drive
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes

当我尝试添加它来扩展卷时，出现错误。

$ vgextend vg_prod /dev/sdg
Devices have inconsistent logical block sizes (4096 and 512).

因此我开始将逻辑扇区大小更改为/dev/sdg4096。

$ fdisk -b 4096 /dev/sdg

当我在 fdisk 中打印分区表时，我确实看到逻辑扇区大小为 4096。

Welcome to fdisk (util-linux 2.34).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.

Device does not contain a recognized partition table.
Created a new DOS disklabel with disk identifier 0xf4a7867a.

Command (m for help): p
Disk /dev/sdg: 3.65 TiB, 4000752599040 bytes, 976746240 sectors
Disk model: Game Drive
Units: sectors of 1 * 4096 = 4096 bytes
Sector size (logical/physical): 4096 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0xf4a7867a

当我创建分区、写入更改并列出时。它又显示 512 作为逻辑扇区大小。

Command (m for help): n
Partition type
   p   primary (0 primary, 0 extended, 4 free)
   e   extended (container for logical partitions)
Select (default p): p
Partition number (1-4, default 1): 1
First sector (256-976746239, default 256):
Last sector, +/-sectors or +/-size{K,M,G,T,P} (256-976746239, default 976746239):

Created a new partition 1 of type 'Linux' and of size 3.7 TiB.

Command (m for help): w
The partition table has been altered.
Calling ioctl() to re-read partition table.
Syncing disks.

$ sudo fdisk -l /dev/sdg

Disk /dev/sdg: 3.65 TiB, 4000752599040 bytes, 7813969920 sectors
Disk model: Game Drive
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0xf4a7867a

Device     Boot Start       End   Sectors   Size Id Type
/dev/sdg1         256 976746239 976745984 465.8G 83 Linux

有没有办法将我的磁盘更改为具有 4096 逻辑扇区大小，以便我可以将其添加到已有的存储中？

答案1

看来您可以allow_mixed_block_sizes = 1在 lvm.conf ( /etc/lvm/lvm.conf) 中设置。

我想，如果您最初设置的 VG（PV）为 4K 扇区，并且想要添加 512b 扇区的 PV，那么该解决方案可能会很好地发挥作用。

如果情况相反，我会小心。

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