PCI class 01: Mass storage controller

Mass storage controller

Code	`01`
Name	Mass storage controller
Subclasses	11
Class drivers (Linux)	`ahci`, `ata_generic` and `nvme`

Frequently asked questions

What is a PCI device of class 01 (Mass storage controller)?

Class 01 stands for “Mass storage controller”. It has 11 subclasses, for example SCSI storage controller, IDE interface and Floppy disk controller.

Which Linux drivers handle Mass storage controller?

In Linux kernel 6.12 these drivers bind to devices by class, regardless of vendor: ahci (01:06:01), ata_generic (01:01) and nvme (01:08:02).

How do I find the class of a PCI device?

On Linux, lspci -nn shows the class in square brackets before the name, e.g. [0106]. On Windows it appears in the hardware IDs as PCI\CC_01XX.

Subclasses

Code	Name	Programming interfaces	Class drivers (Linux)
`01:00`	SCSI storage controller	`00` Vendor specific `11` SCSI storage device (SOP target port using PQI) `12` SCSI controller (SOP target port using PQI) `13` SCSI storage device & controller (SOP target port using PQI) `21` SCSI storage device (SOP target port using NVMe)
`01:01`	IDE interface	`00` ISA Compatibility mode-only controller `05` PCI native mode-only controller `0a` ISA Compatibility mode controller, supports both channels switched to PCI native mode `0f` PCI native mode controller, supports both channels switched to ISA compatibility mode `80` ISA Compatibility mode-only controller, supports bus mastering `85` PCI native mode-only controller, supports bus mastering `8a` ISA Compatibility mode controller, supports both channels switched to PCI native mode, supports bus mastering `8f` PCI native mode controller, supports both channels switched to ISA compatibility mode, supports bus mastering	`ata_generic`
`01:02`	Floppy disk controller
`01:03`	IPI bus controller
`01:04`	RAID bus controller	`00` Vendor specific
`01:05`	ATA controller	`20` ADMA single stepping `30` ADMA continuous operation
`01:06`	SATA controller	`00` Vendor specific `01` AHCI 1.0 `02` Serial Storage Bus	`ahci`
`01:07`	Serial Attached SCSI controller	`01` Serial Storage Bus
`01:08`	Non-Volatile memory controller	`01` NVMHCI `02` NVM Express `03` NVM Express administrative controller	`nvme`
`01:09`	Universal Flash Storage controller	`00` Vendor specific `01` UFSHCI
`01:80`	Mass storage controller