Hi guys, I cannot have access to a ReadyNAS WEBGUI. After entering the user's credentials I get "ReadyNAS Admin Page is offline".But I'm able to access it via ssh session and I noticed that "/dev/md0" is out of space.Going a little bit deeper I found that "gencache.tdb" file in "/var/cache/samba" directory is the one occuping most of the disk space.The main purpose of the ReadyNAS is to store backups.My questions are:I cannot access the ReadyNAS via WEBGUI because the "/dev/md0" filesystem is full?There is a way to clean "gencache.tdb" file? In case affirmative, how can I do it?Removing "gencache.tdb" file will cause any impact on ReadyNAS?Regards, Bruno Pina.

Hi bpina It is quite possible the full root is the cause of the GUI issues, yes. I am not sure what the gencache.tdb is used for, but looking at samba.org is seems like a generic cache. Things is /var/cache is typically just that - a cache for something. Likelihood is that you can remove that file and reboot the NAS and it will probably be fine as any cache should re-build when necesary. However, to be safe you can simply move the cache file to the data volume to preserve it, in case you need to restore it. Move it to /data/.... (ensure the data volume is indeed mounted, which it should be) and then reboot NAS? Might be worth a try.

bpina wrote: Going a little bit deeper I found that "gencache.tdb" file in "/var/cache/samba" directory is the one occuping most of the disk space. How big is it? On my own NAS it is about 650 KiB. root@NAS:/var/cache/samba# ls -als total 652 0 drwxr-xr-x 1 root root 40 Aug 21 2012 . 0 drwxr-xr-x 1 root root 104 Feb 4 2020 .. 652 -rw-r--r-- 1 root root 667648 Dec 30 15:44 gencache.tdb 0 drwxr-xr-x 1 root root 0 Nov 9 2016 printing root@NAS:/var/cache/samba# You should be able to delete the file, but you might need to stop Samba first.

Just removing the file is a very bad idea, if it will even let you. The following should work: systemctl stop samba net cache flush systemctl start sambaHowever, that won't prevent it from filling up again, and I'm not familiar enough with it to know what kinds of things can fill it, though I do read that it apparently has no automatic trimming capability. Is this in a Windows Domain environment, possibly with a lot of users? One of my guesses is that could cause an issue.

If it is a Windows Domain environment with a lot of users you may find ReadyNAS OS 6: "Do not cache ADS accounts locally" option useful

This is a good point mdgm has. This might be what is causing the cache to be so large.

ReadyNAS RR4312 - /dev/md0 partition full

18 Replies

Replies have been turned off for this discussion

rn_enthusiast
Virtuoso
Dec 30, 2020
Hi bpina

It is quite possible the full root is the cause of the GUI issues, yes. I am not sure what the gencache.tdb is used for, but looking at samba.org is seems like a generic cache. Things is /var/cache is typically just that - a cache for something.

Likelihood is that you can remove that file and reboot the NAS and it will probably be fine as any cache should re-build when necesary. However, to be safe you can simply move the cache file to the data volume to preserve it, in case you need to restore it.

Move it to /data/.... (ensure the data volume is indeed mounted, which it should be) and then reboot NAS? Might be worth a try.
StephenB
Guru - Experienced User
Dec 30, 2020
bpina wrote:

Going a little bit deeper I found that "gencache.tdb" file in "/var/cache/samba" directory is the one occuping most of the disk space.

How big is it? On my own NAS it is about 650 KiB.

root@NAS:/var/cache/samba# ls -als total 652 0 drwxr-xr-x 1 root root 40 Aug 21 2012 . 0 drwxr-xr-x 1 root root 104 Feb 4 2020 .. 652 -rw-r--r-- 1 root root 667648 Dec 30 15:44 gencache.tdb 0 drwxr-xr-x 1 root root 0 Nov 9 2016 printing root@NAS:/var/cache/samba#

You should be able to delete the file, but you might need to stop Samba first.
- Sandshark
  Sensei - Experienced User
  Dec 30, 2020
  Just removing the file is a very bad idea, if it will even let you. The following should work:
  
  systemctl stop samba net cache flush systemctl start samba
  However, that won't prevent it from filling up again, and I'm not familiar enough with it to know what kinds of things can fill it, though I do read that it apparently has no automatic trimming capability.
  
  Is this in a Windows Domain environment, possibly with a lot of users? One of my guesses is that could cause an issue.
  - mdgm
    Virtuoso
    Dec 31, 2020
    If it is a Windows Domain environment with a lot of users you may find ReadyNAS OS 6: "Do not cache ADS accounts locally" option useful
- bpina
  Aspirant
  Dec 31, 2020
  Hi,
  Its size is around 1,6 GB.
  At this point, I don't want to delete the file. I'd prefer another workaround like clean the file ou reduce its size.