Sitecom MD-253 lost data on1st hd when added 2nd hd as JBOD

MD-253 & MD-500 Discussion
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eddy1
Posts: 1
Joined: Sat Dec 20, 2014 7:47 am

Sitecom MD-253 lost data on1st hd when added 2nd hd as JBOD

Post by eddy1 » Sat Dec 20, 2014 8:02 am

Hello, I have recently purchased a sitecome MD-253 home nas, I plugged in one 3tb hard drive in the first slot, which got formatted fine, although only as a 2tb as it doesn't support any higher, so I moved onto it all my data which took the best part of 1tb and with a long time wait as it got done over the network. then yesterday I aquired another 2tb hard drive, I plugged it into the second slot, but it wasn't being recognised, and the only option that the software gave me was to format it as a whole RAID1, which I didn't go ahead and do as I was worried I'd loose my data, then reading in the manual it mentioned JBOD mode, so I applied the JBOD mode via the network control panel of the NAS and it only took about 5 minutes, and where I thought all it was going to do was to add a second hard drive to my network, instead I have lost all the folders I previously had on there and it came back as an individual hard drive space again.
Since then I have had the hard drives out and haven't tried anything else.
What are my options? I am sure that in 5 minutes it didn't delete all my data? Probably just changed the partition tables. Any help would be much appreciated! Thanks in advance

Mijzelf
Posts: 6199
Joined: Mon Jun 16, 2008 10:45 am

Re: Sitecom MD-253 lost data on1st hd when added 2nd hd as J

Post by Mijzelf » Sat Dec 20, 2014 2:33 pm

eddy1 wrote:I am sure that in 5 minutes it didn't delete all my data?
Agree. That would take hours.

I don't know that box, and unfortunately JBOD has at least 2 meanings. It stands for 'Just a Bunch Of Disks', and in NAS world it can mean that all disks are used as seperate volumes, but it can also mean the volumes are glued together to one big volume. (Linear raid).

If the box generated a 2nd volume, there should be no problem. If it generated 1, bigger, volume, it either reformatted the new volume, or growed the filesystem on your original disk.

You'll have to look at the disks to see what actually happened. You'll need a Linux system for that. Any PC booted from a Linux Live USB-stick or -CD will do. Theoretically you can use the NAS itself (it runs Linux) but AFAIK it has no default shell access, and installing extra software is not recommended, at the moment.

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