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Background

I was trying to use netatalk to create Time Capsule using an Raspberry Pi 3, following the tutorial here. Some version info:

  • netatalk 3.1.12
  • macOS 10.14.5
  • Raspberian 4.19.50-v7+

Issues and findings

After reaching the last part of the tutorial, and able to connect over afp://, I realised that the volume is read-only.

read only

don't have the necessary permission

I re-read the tutorial and realised that I didn't do the first step, because the drive is already HFS+. My guess is the ignore ownership on this volume is essential for netatalk to work properly.

Result / Symptom list

  • [✔︎] able to connect over afp://
  • [✔︎] able to mount the external drive on RPi
  • [] mounted drive on RPi is read-only
  • [] some of the directory can't be read, neither RPi nor via afp://
    • i.e. cp result in cp: cannot open 'filename' for reading: Permission denied
  • [] unable to mount the external drive on macOS
  • [] volume is read-only on macOS over afp://

The configurations used

/etc/fstab

proc            /proc           proc    defaults          0       0
PARTUUID=7e67b292-01  /boot           vfat    defaults          0       2
PARTUUID=7e67b292-02  /               ext4    defaults,noatime  0       1
/dev/sda2 /media/tm hfsplus force,rw,user,auto 0 0

/etc/netatalk/afp.conf

; Netatalk 3.x configuration file
;

[Global]
; Global server settings

; [Homes]
; basedir regex = /xxxx

;[My AFP Volume]
;path = /media/tm

[Timestone]
path = /media/tm
time machine = yes

/etc/nsswitch.conf

passwd:         files
group:          files
shadow:         files
gshadow:        files
hosts:          files mdns4_minimal [NOTFOUND=return] dns mdns4 mdns
networks:       files
protocols:      db files
services:       db files
ethers:         db files
rpc:            db files
netgroup:       nis

/etc/avahi/services/afpd.service 

<?xml version="1.0" standalone='no'?><!--*-nxml-*-->
<!DOCTYPE service-group SYSTEM "avahi-service.dtd">
<service-group>
    <name replace-wildcards="yes">%h</name>
    <service>
        <type>_afpovertcp._tcp</type>
        <port>548</port>
    </service>
    <service>
        <type>_device-info._tcp</type>
        <port>0</port>
        <txt-record>model=TimeCapsule</txt-record>
    </service>
</service-group>

Attempts to fix

  • macOS mount doesn't work
  • macOS force mount doesn't work
  • macOS gui diskutil first aid is unable
  • macOS cli diskVerify is unable to mount and stopped
  • macOS cli diskRepair is unable to mount and stopped
  • RPi fsck does not seems to fix the problem
  • RPi fsck.hfsplus does not seems to fix the problem

Questions and directions

The drive is able to be mounted read-only with some barred access on RPi, the data is likely to be safe. Currently, the drive refuses to mount on macOS, so I can't use macOS to enable the ignore ownership on this volume.

How come the volume (HFS+, created and used on macOS) is mountable on RPi after the tutorial and became unmountable on macOS afterwards?

Give the symptoms, is there any key step that cause this (besides not check ignore ownership on this volume)?

Are there some tracks as a resolution? to either:

  1. mount the drive on macOS, which allow me to fix the permission and backup the data

  2. fix the permission on RPi, so the backup and be done via afp://

or, any better suggestions to overcome these obstacles.

Marco Leong
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1 Answers1

0

This was driving me up the wall for a week. I take it you are trying to do this from the howtogeek or techradar article?

After the installation, from the raspberrypi I shutdown the system:

sudo shutdown -h now

I unplugged my pi then restarted it (plugged it back in) and ran the following commands:

sudo service avahi-daemon start
sudo service netatalk start
sudo systemctl enable avahi-daemon
sudo systemctl enable netatalk

It worked and I am up and running with my Time Machine!! Hope this helps!

Greg
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