disk driver
 

Hello,
I would like to know which kernel module is the hard disk driver.
the command lsmod list the following kernel modules:
while the command lspci:
According to the lspci output the driver should be
SCSI storage controller: LSI Logic / Symbios Logic 53c1030 PCI-
but what is the relative kernel module?
Thank you in advance

If it was a separate module, how would the kernel load it from disk?

This is 'y' showing it is compiled into the kernel, not a separate module.

Usually such required drivers would be loaded from the initrd file which is a mini-root filesystem containing the initial drivers. This is loaded into memory as part of the inital boot (via grub/lilo/...) which in turn is loaded by the BIOS/EFI rom.

So modules for the physical disks are loaded from disk, but not necessarily by the operating system.

I have had to modify the initrd file for VMs that didn't have the VM disk driver installed - once added the module to the initrd, booting the system worked just fine.

In my case, your command returns "CONFIG_BLK_DEV_SD=y", but that is only supporting block interface to drivers (in this case, the generic SCSI layer. The actual disk driver depends on the hardware interface for the SATA drives (which I believe is the pata_it821 module).

In one of my VMs for testing, the same CONFIG_BLK_DEV_SD is used, but the actual driver is the virtual I/O subsystem that defines the vda devices, but that was not in the initrd by default.

The driver/module in use is mptsas as confirmed by lspci:

00:10.0 SCSI storage controller: LSI Logic / Symbios Logic 53c1030 PCI-X Fusion-MPT Dual Ultra320 SCSI (rev 01)

Guys, thank you all.
I have some doubts about the actual disk driver.
As you can see from the output of the lspci command I get an IDE interface:
00:07.1 IDE interface: Intel Corporation 82371AB/EB/MB PIIX4 IDE (rev 01)
If I check out kernel configuration (Device Drivers -> ATA/ATAPI/MFM/RLL support")
there is an Intel PIIXn chipsets support.
Also, the interface of /dev/hda is IDE.
Thus, the driver should be the one provided by Intel.
Yet, the command dmesg | egrep -i --color 'disk'
I suppose that the code of the driver is complied in
the Linux kernel. The code of the disk driver should be (nm -l -n output):

Anyway, I'm confused because if that code includes (in somehow)
the disk driver, what is mptsas for?
Thank you in advance,