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I have a lacie 2TB nas running in a RAID-1 mode. All of a sudden we could not see any of the data. We have replaced the drives and the new drives just do not work at all either. Any advise is appreciated.

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Well for this problem............
It seems that this is a virus problem..... Try to update your antivirus and perform scan of your computer.......... If you have to recover your file use this link to download a recovery software from this link which im providing--->http://www.recovermyfiles.com/ ....
I hope your hard disk is detecting by your computer......... If its not check the cable connection ................

If you have any doubt fell free to ask.............

Posted on Jul 07, 2010

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Posted on Jan 02, 2017

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You didn't provide details on what mode you were running or if this worked before and this is a sudden event. The manual doesn't appear to cover this situation of one blinking red light: https://www.lacie.com/download/manual/UM_2big_Quadra_EC_EN.pdf
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Most likely the problem you are encountering is due to the RAID mode the device is set in. Most RAID arrays utilize multiple drives of the same size, or with drives of differing size, they just use a portion of the largest that matches the smallest drive. When the device rebuilt the array it partitioned off a portion of the 4tb drive of the same size as the existing 500gb drive. If you want to use full capacity of both drives you would need to use JBOD mode, which just strings the disks together into a storage pool using all available space. This won't offer the data redundancy of RAID1 or speed boost of RAID0, but should allow using full space.

Backup any vital data before doing anything, then look for a switch on the back. Rather than RAID0 or 1 the options may be labelled Safe or Fast, but JBOD is usually still labelled JBOD, or sometimes Big. You can try just flipping the switch to JBOD and seeing if it rebuilds to use all space. If that doesn't work you may need to remove the 4tb drive, connect it to a different system and erase it to get rid of the 500gb partition, then with the Lacie set to JBOD reinstall the 4tb drive so it will add its full size to the array.

The safest option though would be to buy another 4tb drive, backup all data and install both 4tb drives with the device set to RAID1/Safe. You would only get 4tb of total storage, but it would mirror the data on both drives so if one fails the other will still have your data. With JBOD you won't have any auto-backup. If a drive fails the data on it will be lost.

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Hello, I don't know your particular NAS, but a raid 5 is able to survive a single drive failure and continue to supply data ok because it recreates it from the remaining drives plus the parity drive. But, if you then get a subsequent drive failing before you've replaced the original failed drive, (and restored the data to it, which is/should be automatic) then it's really bad news. So, if you definitely have only had a single failed drive then you should just get an alert to warn you to take remedial action- ie, replace the drive. If the NAS has stopped supplying data then you may have got a multiple-drive failure situation. Just a general note of caution when working on a raid array: Some raid systems are clever and you can switch your drives around, some aren't and you can 'break' these raid sets just by swapping the positions of 2 drives, which is too easy to do if they're not labelled and you're trying to faultfind ...so unless you're absolutely certain, just label your drives (and take a photo) before starting to swap drives about. Anyway,good luck with your troubleshooting.
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I have the same problem too on my 2big form lacie . If I use 2x 1,5 tera disk in "fast mode" or in "big mode" my disk manager only shows 746 gigs available (it should be at least 2,5 terra).
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If the failed hard disk drive is replaced with the exact same capacity, RPM and make of hard drive, then the array can be rebuilt. Raid 0 cannot be rebuilt as each drive contains half of the data, If RAID 1 then can be rebuilt as data on each drive is an exact copy. However if combination of RAID 0 and RAID 1 then can be rebuilt. It's best really to handel this hands on, I recommend taking it to a computer technician especially if the information on it is important.

Thanking you
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Hi,
You don't specify whether previously on your USB it was the same lacie external or whether it was a different external drive. It sounds like you were using a different external drive, most likely a single drive.
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It will be much slower than a single drive on USB for writing to it (i.e. backups), but you should see a huge performance boost in reading from the drive than your previous usb.
If you need it to be faster, you would be better suited looking at configuring it for one of the following raid setups:
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Hi there!
Same issue here
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check your network for conflicts, check power supply, fan and nic card, if your sure it's not the the drives inside the drive case, I have had 4 of these fail on me @work with different issues power supply nic card and both drives 4 units did the same thing and they were under warranty so when I got it back, I sold them and bought The Seagate BlackArmor NAS 420. no problems with them as of yet. Lacie get hot and components get hot and fail because there is not enough air flow I think.

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