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not syncing: vfs: unable to mount root on uknown-block(0,0)
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NeddySeagoon
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Joined: 05 Jul 2003
Posts: 44945
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PostPosted: Mon Nov 11, 2019 2:55 pm    Post subject: Reply with quote

Adel Ahmed,

How is your USB stick partitioned GPT or MSDOS?
Code:
# CONFIG_MSDOS_PARTITION is not set
CONFIG_EFI_PARTITION=y

MSDOS is normal for USB Sticks and (e)mmc but your kernel can't read that.

Code:
CONFIG_BLOCK=y

I think SCSI is hidden if you don't have that.

Code:
CONFIG_SCSI=y
CONFIG_BLK_DEV_SD=y
CONFIG_CHR_DEV_SG=y

Good, they are all needed for USB block devices.

Code:
CONFIG_USB_STORAGE=y

You may as well have
Code:
# CONFIG_USB_UAS is not set
on but its not essential.
For devices that support USB attached SCSI, you get DMA transfers and overlapped commands, unlike bulk mode, which is akin to IDE PIO.

Code:
CONFIG_EXT4_FS=y
CONFIG_EXT4_USE_FOR_EXT2=y

Good.

Your lspci only shows USB xHCI Controller, that's USB3. It will also do all the lower USB standards.
Code:

CONFIG_USB_PCI=y
CONFIG_USB_XHCI_HCD=y
CONFIG_USB_XHCI_PCI=y
good.

The EHCI and OHCI options are not required. You don't have that hardware.

Before you rebuild your kernel with CONFIG_MSDOS_PARTITION=y what does fdisk say about your partition tables?
MSDOS or GPT?
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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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Adel Ahmed
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Joined: 21 Sep 2012
Posts: 1282

PostPosted: Mon Nov 11, 2019 3:33 pm    Post subject: Reply with quote

Yes
Enabling the msdos partitions fixed it
I have a bootable ext4 usb stick
Next steps will b e mmc and btrfs
Thank you very much :)
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