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oneself
Tux's lil' helper
Joined: 02 Jul 2005
Posts: 98
Location: New York, NY
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 Posted: Thu Apr 12, 2012 6:57 pm Post subject: VFS: Cannot open root device Mushkin MKNSSDCL SSD [solved] |
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Hi,
I have a working configuration using genkernel on my Thinkpad X200s. All the hardware works. I'm currently trying to get a leaner kernel working using "make localmodconfig". The first problem I am encountering is that my SSD is not working with the new kernel.
I am using a Mushkin SSD:
| Code: | # lshw -class disk -class storage
*-storage
description: SATA controller
product: 82801IBM/IEM (ICH9M/ICH9M-E) 4 port SATA Controller [AHCI mode]
vendor: Intel Corporation
physical id: 1f.2
bus info: pci@0000:00:1f.2
logical name: scsi0
version: 03
width: 32 bits
clock: 66MHz
capabilities: storage msi pm ahci_1.0 bus_master cap_list emulated
configuration: driver=ahci latency=0
resources: irq:44 ioport:1c48(size=8) ioport:183c(size=4) ioport:1c40(size=8) ioport:1838(size=4) ioport:1c20(size=32) memory:f2826000-f28267ff
*-disk
description: ATA Disk
product: Mushkin MKNSSDCL
physical id: 0.0.0
bus info: scsi@0:0.0.0
logical name: /dev/sda
version: 343A
serial: MKN11100000012948
size: 223GiB (240GB)
capabilities: partitioned partitioned:dos
configuration: ansiversion=5 signature=02990dd9
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When I boot up I get the following:
| Code: | | VFS: Cannot open root device "sda2" or unknown-block(0,0) |
I'm fairly certain that my kernel is misconfigured in some way, but I'm not sure what I need to add to make this HD work.
Thank you
_________________
There are 10 types of people, those who know binary and those who don't.
Last edited by oneself on Fri Jul 06, 2012 7:09 pm; edited 1 time in total |
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NeddySeagoon
Administrator
Joined: 05 Jul 2003
Posts: 29965
Location: 56N 3W
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| Posted: Thu Apr 12, 2012 7:36 pm Post subject: |
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oneself,
Start with one of the seed kernels from kernel-seeds.org. Pappy has a sticky support thread in Unsupported Software.
make localmodconfig makes a fully modular kernel, which means you will need an initrd to load the kernel modues you need for booting.
You can avoid an initrd while you learn about the kernel.
The key line in your post is | Code: | description: SATA controller
product: 82801IBM/IEM (ICH9M/ICH9M-E) 4 port SATA Controller [AHCI mode] |
This tells that you need SCSI Disk support built into your kernel, and the AHCI SATA driver.
In addition your will need the driver for your root filesystem configured as <*>. We don't know what this is.
Your unknown-block(0,0) error gives the kernel major,minor numbers of the device the kernel is trying to access. (0,0) does not exist. It means the kernel cannot talk to you hard drive at all.
The numbers here are key to the diagnoses of further errors.
_________________
Regards,
NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
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oneself
Tux's lil' helper
Joined: 02 Jul 2005
Posts: 98
Location: New York, NY
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| Posted: Thu Apr 12, 2012 8:47 pm Post subject: VFS: Cannot open root device with Mushkin SSD [solved] |
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Thank you,
Setting the following options in my .config file from "m" to "y" solved the problem:
| Code: | CONFIG_SATA_AHCI=y
CONFIG_SATA_AHCI_PLATFORM=y
CONFIG_SATA_ACARD_AHCI=y
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There are 10 types of people, those who know binary and those who don't. |
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