LaCie 5Big RAID 6 Recovery

I will start by saying that we can, and have, recovered data from these drives. As with all RAID recovery we carry out, we never use the original controller or drives to access the data. We image the drives on an individual basis and then work on these drives to rebuild the RAID using a form of RAID emulation. The most time consuming part of this type of recovery is discovering the RAID settings that the manufacturer has used.

Due to the complex nature of these NAS devices, we always recommend they are backed up to another form of media. Although recovery is possible, it can be expensive and relatively time consuming. Also if the unit is powered on and RAID rebuilds are attempted then the recovery can be made more complicated or even impossible.

A Little Background

The LaCie 5Big NAS device contains five hard drives and allows for a number of different configurations. One of these configurations is RAID 6, which works in much the same way as RAID 5, but with an additional parity stripe. This additional parity stripe uses an algorithm which requires a relatively high processing overhead, so RAID 6 has rarely been seen in consumer level devices. The low cost of processing means that RAID 6 is now a viable option for embedded NAS devices such as the LaCie 5Big.

The advantage of RAID 6 over RAID 5 is that with 5 disks it can theoretically cope with two disk failures. This gets round an increasingly common problem with large capacity RAID 5 arrays where if a second disk fails whilst rebuilding a failed disk, there should be enough parity information to continue the rebuild successfully.

It is important to remember that due to the complex nature of RAID arrays, it is crucial to make backups of the data to a different type of storage.

If you have a failed or broken LaCie 5Big then use the contact details on the right to contact us. Alternatively you can leave a comment here and we will get back to you.

3 Replies to “LaCie 5Big RAID 6 Recovery”

  1. Excellent advice!

    We purchased a Lacie 5Big Network2 (11TB) because it was relatively inexpensive, (around $1000). But we went into the deal with both eyes open knowing that the Lacie RAID, hard disks and software tools are not enterprise-class – hence the low price tag.

    With this in mind, we have set our Lacie 5Big up for RAID 6, (as advised here), but we also regularly backup the data from the 5Big to large capacity USB 3.0 drives which are kept in airtight bags and wrapped in foam in a locked cabinet.

    If you are storing to NAS, even if its configured for RAID, make sure you back up the data to a separate storage device or disks – regularly.

Leave a Reply

Your email address will not be published. Required fields are marked *