[errno 30] read-only file system

PutinIsLove · n00b Joined: 24 Apr 2016 Posts: 5

Hi guys, i' m very new to linux and i want to install a gentoo x64 machine.

After the GRUB2 and the reboot,i log as root and after that i can' t edit any files and i' m really stuck.

I can' t even do a emerge --sync

I' ve got this error : emergelog(): [Errno 30] Read-only filesystem: b'/var/log/emerge.log

Here is my fstab and my fdisk.

https://imgur.com/a/XCtWS

And here is the details of what i need :

Bios/grub 32M / (bootloader)
boot 512M ext2 (boot)
swap 1G swap (swap)
root everything ext4 (root)

Thanks !!

krinn · Watchman Joined: 02 May 2003 Posts: 7470

NeddySeagoon · Posted: Sun Apr 24, 2016 4:08 pm Post subject:

PutinIsLove,

Welcome to Gentoo.

The init system will mount your root readonly until it has run rootfsck.
I would expect the noauto in your fstab to be ignored for root, as its not mounted by the localmount service, which is what reads /etc/fstab to determine what to mount where and with what options.

Root has to be mounted to read /etc/fstab so its a bit late to decide not to mount it later.
The ro option may be obeyed though. While that's fine on an embedded system, if that's really what you want its a problem on a desktop install.

Root should be mounted with the noatime option. This avoids every read costing a write to update the last access time of the file.
_________________
Regards,

NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.

PutinIsLove · n00b Joined: 24 Apr 2016 Posts: 5

Thanks to you guys ! It seems like it' s working now. I' ve still plenty of work to do, to reach my goal.

Thanks again !

Drone4four · Apprentice Joined: 09 May 2006 Posts: 247

I am experiencing a very similar issue here on my recent Gentoo installation but the root entry in my fstab under the <opts> column does not have the 'ro' attribute.

Neddy: You said that root should be mounted with noatime option, and the root line in my fstab has it. Yet my fs is still read only.

Since I can't use wgetpaste (b/c wgetpaste needs to write temporary files), here is a screenshot of my fstab: http://imgur.com/a/Lt4qw
_________________
My rig:
IBM Personal System/2 Model 30-286 - - Intel 80286 (16 bit) 10 Mhz - - 1MB DRAM - - Integrated VGA Display adapter
1.44MB capacity Floppy Disk - - PS/2 keyboard (no mouse)

NeddySeagoon · Posted: Tue Mar 21, 2017 12:00 am Post subject:

Drone4four,

You can cheat a little.

Log in as root. Run the command

Drone4four · Apprentice Joined: 09 May 2006 Posts: 247

Thanks, NeddySeagoon, for your reply!

I ran both your suggested mount commands. The output for both were 'mount: can't find UUID=[$hash]'

So I booted my live media, chrooted in, installed wgetpaste, collected my dmesg. Here is my dmesg: https://paste.pound-python.org/show/b6J5E6lEsgcl7VRiorLB/

Thanks again for your attention.

edit: grammar correction
_________________
My rig:
IBM Personal System/2 Model 30-286 - - Intel 80286 (16 bit) 10 Mhz - - 1MB DRAM - - Integrated VGA Display adapter
1.44MB capacity Floppy Disk - - PS/2 keyboard (no mouse)

NeddySeagoon · Posted: Tue Mar 21, 2017 3:27 pm Post subject:

Drone4four,

That's the liveCD dmesg, not yours. No matter.

Drone4four · Apprentice Joined: 09 May 2006 Posts: 247

Thank you, Neddy: I booted the live media and changed the old UUID reference in my fstab with the more up-to-date UUID produced via blkid. I then booted without the live media and - - presto - - the read only issue is gone!

Now I have moved on to tackling some other issues with my Gentoo, including virtualbox guest additions.
_________________
My rig:
IBM Personal System/2 Model 30-286 - - Intel 80286 (16 bit) 10 Mhz - - 1MB DRAM - - Integrated VGA Display adapter
1.44MB capacity Floppy Disk - - PS/2 keyboard (no mouse)