Mkfs.f2fs on null_blk device

Mkfs.f2fs on null_blk device

[Sijie Lan]

When I try to make f2fs on null_blk device, it always shows "Device
size is not sufficient for F2FS volume",
I am I gave enough space for the file system, i.e, 20GiB. I just want
to know hot to fix it.
this is the output message:
[sijie@fedora null_blk]$ sudo mkfs.f2fs -f -m  /dev/nullb1

    F2FS-tools: mkfs.f2fs Ver: 1.15.0 (2022-05-13)

Info: Disable heap-based policy
Info: Debug level = 0
Info: Trim is enabled
Info: Host-managed zoned block device:
      20 zones, 2147483648 zone size(bytes), 10 randomly writeable zones
      524288 blocks per zone
Info: Segments per section = 1024
Info: Sections per zone = 1
Info: sector size = 4096
Info: total sectors = 10485760 (40960 MB)
Info: zone aligned segment0 blkaddr: 524288
Error: Device size is not sufficient for F2FS volume
Error: Failed to prepare a super block!!!
Error: Could not format the device!!!

[f2fs-dev] Mkfs.f2fs on null_blk device

[Sijie Lan]

When I try to make f2fs on null_blk device, it always shows "Device
size is not sufficient for F2FS volume",
I am I gave enough space for the file system, i.e, 20GiB. I just want
to know hot to fix it.
this is the output message:
[sijie@fedora null_blk]$ sudo mkfs.f2fs -f -m  /dev/nullb1

    F2FS-tools: mkfs.f2fs Ver: 1.15.0 (2022-05-13)

Info: Disable heap-based policy
Info: Debug level = 0
Info: Trim is enabled
Info: Host-managed zoned block device:
      20 zones, 2147483648 zone size(bytes), 10 randomly writeable zones
      524288 blocks per zone
Info: Segments per section = 1024
Info: Sections per zone = 1
Info: sector size = 4096
Info: total sectors = 10485760 (40960 MB)
Info: zone aligned segment0 blkaddr: 524288
Error: Device size is not sufficient for F2FS volume
Error: Failed to prepare a super block!!!
Error: Could not format the device!!!


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Re: [f2fs-dev] Mkfs.f2fs on null_blk device

[Shinichiro Kawasaki]

On Nov 01, 2022 / 00:09, Sijie Lan wrote:

...

> Info: Host-managed zoned block device:
>       20 zones, 2147483648 zone size(bytes), 10 randomly writeable zones

When zone size is large comparing to device size, reserved area size tend to be
large and results in the failure. Can you try with smaller zone size, such as
128MB or 64MB?

-- 
Shin'ichiro Kawasaki

Re: [f2fs-dev] Mkfs.f2fs on null_blk device

[Shinichiro Kawasaki via Linux-f2fs-devel]

On Nov 01, 2022 / 00:09, Sijie Lan wrote:

...

> Info: Host-managed zoned block device:
>       20 zones, 2147483648 zone size(bytes), 10 randomly writeable zones

When zone size is large comparing to device size, reserved area size tend to be
large and results in the failure. Can you try with smaller zone size, such as
128MB or 64MB?

-- 
Shin'ichiro Kawasaki

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