---
name: "blk_queue_io_min"
section: "9"
platform: "linux"
package: "linux-manual-4.9"
version: "4.9.228-1"
release: "Debian 9 (Stretch)"
platforms: ["linux"]
url: "https://new.carta.tech/blk_queue_io_min"
---

# blk\_queue\_io\_min(9)

set minimum request size for the queue

## NAME

blk\_queue\_io\_min - set minimum request size for the queue

## SYNOPSIS

**void blk\_queue\_io\_min(struct request\_queue \*** *q***, unsigned int** *min***);**

## ARGUMENTS

*q*

the request queue for the device

*min*

smallest I/O size in bytes

## DESCRIPTION

Storage devices may report a granularity or preferred minimum I/O size which is the smallest request the device can perform without incurring a performance penalty. For disk drives this is often the physical block size. For RAID arrays it is often the stripe chunk size. A properly aligned multiple of minimum\_io\_size is the preferred request size for workloads where a high number of I/O operations is desired.

## COPYRIGHT