Recovery from NAS failure

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Recovery from NAS failure

Unread post by brassing » Thu Nov 27, 2014 2:19 pm

I have a DS213j set up as Synology Hybrid RAID (SHR) with 2 2TB disks. What happens if the DS213j fails? Are the disks just mirrors so that I can connect either to a PC and see it as an external drive and recover the data? If not would it be better to change to RAID 1? What are the advantages of SHR over RAID 1?

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Re: Recovery from NAS failure

Unread post by HarryPotter » Thu Nov 27, 2014 11:10 pm

SHR and RAID1 are the same on a 2 bay system.
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Re: Recovery from NAS failure

Unread post by brassing » Fri Nov 28, 2014 11:07 am

Thanks - that answers my second question. How about the first. Can I just mount one of the drives in a PC or as an external drive and recover the contents? I just found An article in the knowledge base (https://originwww.synology.com/en-uk/kn ... se/faq/579) which says you need to mount both drives in a PC and then use Ubuntu OS and a special utility. I can see that is necessary for a striped RAID but isn't just one of the drives enough for SHR or RAID 1? I understand that the Synology disk does not use a standard Windows supported file system so how do you read that?

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Re: Recovery from NAS failure

Unread post by HarryPotter » Fri Nov 28, 2014 6:27 pm

The question is not the RAID but the file system which always is ext4. And Windows cant read it.


http://forum.synology.com/enu/viewtopic ... 60&t=51393
*Please do not Private Message me for support questions; leave it on the forum so all members can learn. Thanks!*

DS718+ / DSM 6.2-23511 / ST4000VN000-2AH166 / SA400S37120G SSD cache /16 GB RAM
DS415+ / DSM 6.2-23511

LMS 7.9.1-166, 2 Squeezebox 3 + Boom

APC Smart UPS SUA750i

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Re: Recovery from NAS failure

Unread post by brassing » Sat Nov 29, 2014 11:46 am

Understood. The knowledgebase says to run Ubuntu from a USB stick. My question is do I need to connect both of the drives or just one. And can it (they) be in external USB enclosures.

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Re: Recovery from NAS failure

Unread post by HarryPotter » Sat Nov 29, 2014 11:51 am

One disks should be enough.
*Please do not Private Message me for support questions; leave it on the forum so all members can learn. Thanks!*

DS718+ / DSM 6.2-23511 / ST4000VN000-2AH166 / SA400S37120G SSD cache /16 GB RAM
DS415+ / DSM 6.2-23511

LMS 7.9.1-166, 2 Squeezebox 3 + Boom

APC Smart UPS SUA750i

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