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PostPosted: Mon Nov 04, 2013 11:33 pm 
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Newbie

Joined: Fri Apr 26, 2013 7:34 am
Posts: 9
Hi,

After a power failure, the NAS is not visible in the network. It seems to boot properly, the
disks spin for some time, but no connection, so I can't check. Also the lights on the
ethernet contact on the NAS and on the router are on.
The disks are OK. I could mount and backup them on another machine.
However, there's no way to talk to the device. Bufallo suggested to press the function
button and rebooting, it doesn't work. Then they suggested to reinstall the firmware,
but LSUpdater does not even detect the device (neither does the router to which it is attached).
This happened to me twice and it seems that it happened to others out there, but I could not figure
out a solution. For the time being I sent the device to the dealer (it is in warranty) after
backing up the disks. My questions are:
Is the device intact as Buffallo believes or is it damaged?
In any case: How can I protect the device so that it gets safely through the next power failure?
Thanks,


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PostPosted: Tue Nov 05, 2013 7:50 pm 
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Moderator

Joined: Fri Jun 29, 2007 10:39 am
Posts: 2604
mnatiello wrote:
..
In any case: How can I protect the device so that it gets safely through the next power failure?
...

NEVER EVER use a Buffalo NAS without a UPS (Uninterruptible Power Supply). Never.
Particularly with regard to using RAID configurations.
Otherwise you play with fire and then shall not complain, if you get burned. ;)

_________________
Please do not use private mail (PN/M) to ask questions. Use the proper forum instead. (me)

If there is no verified backup of a dataset, the dataset, by definition, is unimportant. (c't 2012)

RAID (no matter which level) never ever substitutes a backup. (me)


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PostPosted: Fri Nov 08, 2013 11:05 am 
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Newbie

Joined: Fri Apr 26, 2013 7:34 am
Posts: 9
kenatonline wrote:
NEVER EVER use a Buffalo NAS without a UPS (Uninterruptible Power Supply).


I understand. Could you please help me with this?
What is the goal of the ups?
* To let power fading out gently on the nas?
* To send a shutdown signal to the nas?
Buffalo realised that the device was broken and is sending me a newer model replacement,
the LS-420D-EU. Can I put debian on it? Any link to proper instructions?

Thank you for your help.
M.Natiello


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PostPosted: Sat Nov 09, 2013 7:29 am 
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Moderator

Joined: Fri Jun 29, 2007 10:39 am
Posts: 2604
The UPS will "bypass" the power supply for a certain time (minutes not
hours) in case of a power blackout, using its accumulators.
If the power will NOT come back within this minutes, the NAS will get
a power down signal and will .... power down.
If the power comes back within this minutes, the UPS will charge its
accumulators and "remove" the bypass.
The connection between UPS and NAS is via USB (serial in former times).

_________________
Please do not use private mail (PN/M) to ask questions. Use the proper forum instead. (me)

If there is no verified backup of a dataset, the dataset, by definition, is unimportant. (c't 2012)

RAID (no matter which level) never ever substitutes a backup. (me)


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PostPosted: Tue Dec 03, 2013 6:46 am 
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Total Newbie

Joined: Mon Dec 02, 2013 10:47 am
Posts: 1
Yes NAS is not visible in the network after a power failure. But you do not remove power to reset network. Thus devices are harmed and you can protect the device safely through the next power failure. So I strongly recommend you install power protection devices and protect yourself against these sorts of events. View our website [Moderator: No commercial advertisement without permission of the admins] for more details about the circumstances or harm coming up from these sorts of occasions and also vital data about interruptions, continuity of supply and the support on which we supply power to our clients.


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