libnvme\_update\_block\_size(9) libnvme API manual libnvme\_update\_block\_size(9)

# [NAME](#NAME)

libnvme\_update\_block\_size - Update the block size

# [SYNOPSIS](#SYNOPSIS)

**int libnvme\_update\_block\_size** **(struct libnvme\_transport\_handle \*hdl ,** **int block\_size );**

# [ARGUMENTS](#ARGUMENTS)

[hdl](#hdl)

Transport handle

[block\_size](#block_size)

New block size

# [DESCRIPTION](#DESCRIPTION)

Notify the kernel blkdev to update its block size after a block size change. This should only be used for namespace handles, not controllers.

# [RETURN](#RETURN)

0 if the block size was updated or a negative error code otherwise.

libnvme\_update\_block\_size September 2026

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Document: libnvme_update_block_size-libnvme3(2) from nvme-cli 3.1-r0 (Chainguard OS)
Source: https://github.com/linux-nvme/nvme-cli