Raspberry Pi Forums

Posted: **Tue Feb 09, 2016 11:25 pm**

Hello,

I have been trying to get iSCSI rootfs working on the raspberry pi for a while now and have failed using initramfs.
I have now tried to use dracut-network and pass the iSCSI target options via cmdline.txt
It seems to start out well, the iSCSI target shows up as /dev/sda but ultimatley dracut fails to boot from the target giving the same error message as when attempting to mount a device (/dev/sda) and not a partition (/dev/sda1).

My cmdline.txt is as follows

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dwc_otg.lpm_enable=0 console=ttyAMA0,115200 console=tty1 ip=192.168.0.39 netmask=255.255.255.0 root=iscsi:@192.168.0.40::::iqn.2005-10.org.domain.host:target iscsi-initiator=iqn.2005-10.org.domain.raspberrypi:01 elevator=deadline rootfstype=ext4 fsck.repair=yes rootwait

My config.txt is as follows

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initramfs initramfs.img
dtparam=audio=on

The error i get from the dracut journalctl is

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Mounting /sysroot
mount: wrong fs type, bad option, bad superblock on /dev/sda,
EXT4-fs (sda): VFS: Can't find ext4 filesystem
missing codepage or helper program, or other error

This is the same error message you get when you miss a number and type

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mount -t ext4 /dev/sda /sysroot

And when I manually type in

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mount -t ext4 /dev/sda1 /sysroot

The partition mounts, and I can go in and see the files.

Is there anyway to specify the partition number the rootfs is on, or is it a bug in dracut? Could the cmdline.txt argument

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blkdevparts=

be useful for something here, and what would the syntax be?

Here is the rdsosreport.txt that dracut outputs

http://pastebin.com/ssieGz4M

Thank you for your help.

Posted: **Fri Feb 12, 2016 7:53 pm**

For those interested I got it to work by specifying the partition ID
On the running system identify the PARTUUID by using

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blkid

It then works by specifying the iSCSI target in netroot= and the partition UUID in root= like this in the cmdline.txt

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dwc_otg.lpm_enable=0 console=ttyAMA0,115200 console=tty1 ip=192.168.0.XXX netmask=255.255.255.0 netroot=iscsi:@192.168.0.XXX::::iqn.XXXX-XX.org.domain.host:target iscsi-initiator=iqn.XXXX-XX.org.domain.host:01 root=PARTUUID=XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait

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iSCSI Dracut attempting to mount a device not a partition

iSCSI Dracut attempting to mount a device not a partition

Re: iSCSI Dracut attempting to mount a device not a partitio