Oops, 1 TB at risk

read errors

This is what happened last Saturday after I rebooted my Synology NAS. After I updated my Synology 209 to the latest DSM version, the first thing I noticed was that the NAS sent me emails that Hard disk 2 was having problems; I logged in and saw that it had crashed!

Volume 2 has crashedOh no, not now! I have so many things to do, I can’t handle this right now…

I had no idea how bad the condition of the HDD was (what does crashed really mean?), so I searched through some log files for additional information and found out that the hard disk was suffering from read errors. Okay… lets see how much of the data can still be saved, cause I didn’t like the idea of losing everything I did that day – I just hate doing things twice.

Fortunately the HDD could still be mounted in read-only mode, so I started searching for some free disk space (about 1 TB needed) and found some on my PC. A hard disk on which I store parts of my code still had ~500 GB of free space, so I copied parts of the crashed volume there. And my other NAS, a Synology 109 which I mainly use as “backup of the backup” (paranoia? I call it experience ;-)) and which is normally located off-site 1km away from here, was accidentally here in our house for doing some updates & maintenance. I still had ~400 GB of free disk space there too.

So I scheduled some backup jobs and let them run; this evening, almost 48 hours later, they were all successfully completed, phew!  And from what I can see, nothing has been lost. I’ve ordered a new HDD (2 TB)  which will arrive tomorrow. After it has been installed I’ll have to wait until all the data is copied back to where it belongs; so with a bit of luck everything is up and running again on Thursday.

That’s 5 days of doing almost nothing else but checking the progress of backup jobs… what a waste of time. Well, that’s the negative approach – in fact, I’m lucky that I was still able to access the crashed disk, make a backup of the data and not lose a single byte! Another comforting thought was that no matter how bad the crash would have been, I would still have a 2nd daily backup of all the really important stuff…

Just think of it, the data on all your storage devices does not only represent a lot of bytes, it actually represents a part of your life – photos, video, code and all the other personal data you’ve collected through the years. And they’re worth a good backup plan!

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3 Responses to Oops, 1 TB at risk

  1. Pingback: Backing up Raspberry Pi to Synology NAS - Digits Domotica Blog

  2. Sebastiaan Ebeltjes says:

    Dit heb ik ook vaak gehad, zelfs met 3 TB schijven in mijn webserver, gingen na 1/2 jaar kapot!
    De oplossing: Haal wat duurdere schijven die 24/7 aankunnen!, kost wat meer, heb je ook wat meer! 😉

    • Ik moet zeggen dat ik niet mag klagen; ik werk al met HDD’s sinds de tijd dat een 20 MB HDD ‘top of the bill’ was en dit jaar is voor het eerst dat ik thuis echte HDD problemen heb. Altijd gerenommeerde merken gebruikt en nooit voor een dubbeltje op de eerste rang willen zitten hebben daar zeker toe bijgedragen.

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