<p>Beberapa hari yang lalu, saya mengalami kendala disalah satu server yang memiliki moutingan disk menggunakan S3QL. Dimana ketika mau di mouting ulang, muncul pesan error &#8220;Backend reports that fs is still mounted elsewhere, aborting&#8221; lebih tepatnya seperti berikut ini</p>
<pre>root@server:~# <span style="color: #0000ff;">mount.s3ql s3://nama-bucket/ /mnt/nama-bucket --allow-other</span> 
Using 8 upload threads. 
Autodetected 524232 file descriptors available for cache entries 
Ignoring locally cached metadata (outdated). 
Backend reports that fs is still mounted elsewhere, aborting. 
</pre>
<p>Setelah di cek di beberapa forum, error tersebut biasanya dikarenakan melakukan reboot/shutdown server tanpa unmouting file system S3QL yang termounting terlebih dahulu, sehingga ketika dilakukan mount ulang, dianggap file system masih termounting di tempat lain.</p>
<blockquote>
<h3>Baca Juga : <a href="https://rizkypratama.id/blog/2017/09/20/mengatasi-error-file-system-damaged-ketika-mounting-storage-s3/" target="_blank" rel="noopener">Mengatasi File System Damaged Ketika Mounting Storage S3</a></h3>
</blockquote>
<p>Untuk eskalasinya, silakan lakukan fsck dengan perintah seperti berikut</p>
<pre>fsck.s3ql s3://nama-bucket 
</pre>
<p>Nanti akan ditanyakan konfirmasi seperti berikut, ketik <strong><em>continue</em></strong> kemudian tekan Enter, maka proses fsck akan berjalan, untuk berapa lamanya tergantung dari banyaknya data</p>
<pre>Starting fsck of s3://nama-bucket/ 
Ignoring locally cached metadata (outdated). 
Backend reports that file system is still mounted elsewhere. Either 
the file system has not been unmounted cleanly or the data has not yet 
propagated through the backend. In the later case, waiting for a while 
should fix the problem, in the former case you should try to run fsck 
on the computer where the file system has been mounted most recently. 
Enter "continue" to use the outdated data anyway: 
<span style="color: #ff0000;"><strong>continue 
</strong></span></pre>
<p>Ini proses fscknya, tunggu hingga selesai</p>
<pre>Downloading and decompressing metadata... 
Reading metadata... 
..objects.. 
..blocks.. 
..inodes.. 
Creating temporary extra indices... 
Checking lost+found... 
Checking cached objects... 
Checking names (refcounts)... 
Checking contents (parent inodes)... 
Checking objects (reference counts)... 
Checking objects (backend)... 
Backing up old metadata... 
Cleaning up local metadata... 
Completed fsck of s3://nama-bucket 
</pre>
<p>Jika sudah completed, silakan mounting kembali menggunakan S3QL, semestinya saat ini sudah bisa dimounting.</p>
<pre>root@server:~# <span style="color: #0000ff;">mount.s3ql s3://nama-bucket /mnt/nama-bucket --allow-other</span> 
Using 8 upload threads. 
Autodetected 524232 file descriptors available for cache entries 
Using cached metadata. 
Setting cache size to 80235 MB 
Mounting filesystem... 
</pre>
<p>Di akhir postingan ini, ada sedikit pesan dari si developer S3QL ini :-D</p>
<p><img data-attachment-id="1396" data-permalink="https://rizkypratama.id/blog/2019/06/20/mengatasi-s3ql-error-backend-fs-is-still-mounted/screen-shot-2019-06-20-at-14-20-17/" data-orig-file="https://i0.wp.com/rizkypratama.id/wp-content/uploads/2019/06/Screen-Shot-2019-06-20-at-14.20.17.png?fit=527%2C155&;ssl=1" data-orig-size="527,155" data-comments-opened="1" data-image-meta="{";aperture";:";0";,";credit";:";";,";camera";:";";,";caption";:";";,";created_timestamp";:";0";,";copyright";:";";,";focal_length";:";0";,";iso";:";0";,";shutter_speed";:";0";,";title";:";";,";orientation";:";0";}" data-image-title="Screen Shot 2019-06-20 at 14.20.17" data-image-description="" data-image-caption="" data-medium-file="https://i0.wp.com/rizkypratama.id/wp-content/uploads/2019/06/Screen-Shot-2019-06-20-at-14.20.17.png?fit=300%2C88&;ssl=1" data-large-file="https://i0.wp.com/rizkypratama.id/wp-content/uploads/2019/06/Screen-Shot-2019-06-20-at-14.20.17.png?fit=527%2C155&;ssl=1" class="aligncenter wp-image-1396 size-full" src="https://rizkypratama.id/wp-content/uploads/2019/06/Screen-Shot-2019-06-20-at-14.20.17.png" alt="" width="527" height="155" /></p>
<ul>
<li>Jadi apapun kendala yang dialami saat menggunakan S3QL, pasti 99% bisa diatasi dengan menjalankan fsck.s3ql :-D</li>
<li>Jangan shutdown server ketika file system S3QL masih termounting pada server</li>
</ul>
<p>Mungkin cukup sekian, semoga bermanfaat</p>
<div class="saboxplugin-wrap" itemtype="http://schema.org/Person" itemscope itemprop="author"><div class="saboxplugin-tab"><div class="saboxplugin-gravatar"><img src="https://rizkypratama.id/wp-content/uploads/2020/09/My-Photos.jpg" width="100" height="100" alt="My Photos" itemprop="image"></div><div class="saboxplugin-authorname"><a href="https://rizkypratama.id/blog/author/rizky/" class="vcard author" rel="author"><span class="fn">Rizky Pratama</span></a></div><div class="saboxplugin-desc"><div itemprop="description"><p>Rizky Pratama. Tinggal di Bekasi, Jawa Barat. Seorang IT di salah satu perusahaan IT. Pengguna Mac, Linux dan Windows<br />
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