Tag Archives: NAS

Samba config for Apple Time Machine

Global config

In /etc/samba/smb.conf under the [global] section, I have the following (not complete config, just the relevant settings):

protocol=SMB3
vfs objects = acl_xattr fruit streams_xattr aio_pthread
fruit:aapl = yes
fruit:model = MacSamba
fruit:posix_rename = yes
fruit:metadata = stream
fruit:nfs_aces = no
recycle:keeptree = no
oplocks = yes
locking = yes

Some comments:

I believe SMB3 is required – Time Machine struggles with older protocols.
The order of vfs objects is important – aio_pthread must go last.
Without aio_pthread, my backups fail while scanning. I suspect Time Machine is heavily threaded and does a lot of requests in parallel – apparently too much for a single samba thread.
fruit:posix_rename = yes appears to be the default and can probably be omitted
fruit:metadata = stream was a copy-paste and not thought through by me – I’m unsure of the implications of this

These work for me as a general set of settings for mac clients – I don’t use Windows or Linux clients often, so I don’t know how well it works for them. It’s possible some of these options are not required, as they’ve accumulated over time.

Share Config

The share itself is configured like so:

[TimeMachine NAS]
path=/pool1/backup/timemachine
comment=Time Machine
valid users = alex
writable = yes
durable handles = yes
kernel oplocks = no
kernel share modes = no
posix locking = no
ea support = yes
browseable = yes
read only = no
inherit acls = yes
fruit:time machine = yes

According to the docs, “fruit:time machine = yes” sets durable handles, kernel oplocks, kernel share modes and posix locking – you can probably omit these.

/pool1/backup/timemachine is a ZFS volume with a quota, which was set with “zfs set quota=3TB pool1/backup“. The available space is reported correctly to the client (Finder), so I’d expect it to work fine for restricting disk usage, and for time machine to manage its snapshots.

Home Server – new HBA edition

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Some long time readers of this blog may remember my home server articles, the most recent being “Ubuntu Home Server 14.04 – A DIY NAS“. There haven’t been any more recently because there’s not been much to report. The server described in that article, built in 2014, has been backbone of my home network ever since.

Since then, I have swapped out hard drives a couple of times (it now contains 2x16TB Seagate Exos and 4x4TB Seagate IronWolf), doubled the ram to 8GB, and added a NVME riser card (along with a cheap 128GB NVME SSD), so I could have a separate boot drive while using all 6 SATA ports for hard drives.

Along the way it also lost HTPC and media player duties to an Apple TV, so now it’s little more than a file and backup server with Plex Media Server, Syncthing, and Duplicati installed. And the operating system has been upgraded from Ubuntu 14.04 to 16.04, 18.04, 20.04 and now 22.04.

A couple of weeks ago though, it failed. And by failed I mean, all I got was blank screen when powering on. No post, and no signs of life other than spinning fans.

My immediate thought was a loose connector, or possibly memory or motherboard failure, so I disconnected everything, blew the dust out and plugged everything back in. With the hard drives unplugged, everything worked. With 4 hard drives plugged in it still worked. Then it failed again when I connected the last two.

By now I figure I’m looking at a dodgy SATA cable, SATA port, or hard drive, but the core components are obviously fine. So why not give it a minor overhaul at the same time?

Continue reading →

Ubuntu Home Server 14.04

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I had grand intentions.

This home server article was to be a detailed masterpiece, a complete documentation of my home server setup.

It hasn’t turned out that way, and many pieces are missing. Turns out, that writing a detailed article on setting up a server is much harder than just doing it! So what you see here is what I finally managed to publish, 5 months after actually building it. I hope you find it useful, and I don’t rule out the possibility that I may update parts of it in future. Continue reading →

Ubuntu Home Server 14.04 – A DIY NAS

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It’s been more than 4 years since I wrote about home servers, but my Ubuntu Home Server article was, for a while, the most popular post on this blog. Since moving to the UK though, I’ve taken a more appliance-based approach to my home network. For the last few years I’ve been using a Boxee Box for media playback, and a 4-bay Netgear ReadyNAS duo NV2+ for storage, mainly to keep the bulk of my possessions to a minimum.

The appliance approach does have advantages. It is power efficient, easy to setup, and very low maintenance. But after getting an internet connection with decent upload speed, I wanted to run CrashPlan on the NAS without having to have another PC running. I managed to get it running by following directions I found here.

There’s just one problem:

3.3 months to upload 350GB is a little too long

Performance is abysmal, and I’ve only selected the most important data – my photos. I’m limited not by my internet connection, but by the NAS’s anaemic CPU and lack of ram (just 256Mb). Furthermore, it’s always had very slow read and write speeds – generally around 2Mb/sec, and loading a large directory via its Samba shares can take a while.

So I started to look for a replacement. My requirements:

Minimum 2GB ram
Strong CPU, preferably x86
4+ drive bays
Linux based OS
Root access to said OS

The best pre-built option I could find which meets those requirements is the Thecus N5550, but at £383 it is a long way from cheap. And it barely meets the specs; an Atom CPU is strong for a NAS but not by modern x86 standards.

While the customised software shipped with a NAS does offer some conveniences, it also gets in the way of using newer Linux features such as BTFS RAID 5/6 (which is currently not considered stable but should be within the next 12 months). You’re also reliant on the vendor for distribution upgrades, and the priority is going to be shiny features which consumers will appreciate, not keeping the foundation OS up to date. The ReadyNAS NV2+ is currently running Debian Squeeze, and will be until the day support ends.

At this point I realised that a pre-made NAS with the level of power and flexibility I wanted doesn’t exist at a realistic price point. And with the end of Boxee support its days as a useful device are numbered, so a HTPC could be on the cards as well. It’s time to build my own server again.