Data recovery and disk repair questions and discussions related to old-fashioned SATA, SAS, SCSI, IDE, MFM hard drives - any type of storage device that has moving parts
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LaCie 20TB

May 18th, 2026, 13:56

Hi, i have the LaCie 20TB with 2x Seagate 10TB drive, whose history is taken into account by the video hardware (MacOS), and the current version is normal, but it can't be done. Attempting to RAID 0 it in UFS gives results such as light ExFAT partitions, light structured files, and instead of video files recovered from the drive, unfortunately, they don't play safely. I've tried multiple stripe size applications, but the result is the same. I conclude that I'm doing something wrong. First, I need to check if this is really RAID 0. Below is the first data returned on both drives.
dwa.png

image.png

Re: LaCie 20TB

May 19th, 2026, 11:31

The partition info would be in sectors 2 - 33. It would be best to provide binary data, not a screenshot.

Re: LaCie 20TB

May 19th, 2026, 14:30

fzabkar wrote:The partition info would be in sectors 2 - 33. It would be best to provide binary data, not a screenshot.

You are 100 percent right, these are the first sectors from 0 to 32 of both disks
first.zip
(602 Bytes) Downloaded 8 times

secend.zip
(572 Bytes) Downloaded 7 times

Re: LaCie 20TB

May 19th, 2026, 16:24

I think the stripe size is 24 sectors.

Re: LaCie 20TB

May 19th, 2026, 16:56

... or 12 sectors.

Re: LaCie 20TB

May 19th, 2026, 18:01

fzabkar wrote:... or 12 sectors.

No, it has to be a multiple of 8.

Re: LaCie 20TB

May 20th, 2026, 3:39

Pi0tr is our colleague from Poland, we connected remotely and checked the array.
The root folder of the exFAT partition was corrupted, but 7 TB of data and its structure are working after scanning the index.

The LaCie configuration is custom, stripe size is 4KB, grid pattern D1, D3, D2, D4.
RDL configuration for UFS:

stripes(8,2) {
1,2;
1,2;
}


Configuration for R-Studio:
RAID 0
Number of rows: 2
Block size: 4KB

Re: LaCie 20TB

May 20th, 2026, 14:00

I prefer not to use RAID and use JBOD instead. This way error checking is almost trivial.

RAID made sense with 9GB disks but with 44TB disks who cares if you need 4 or 5 drive letters. I am expecting 100TB disks to surface maybe in a year or two.

Re: LaCie 20TB

May 20th, 2026, 16:23

@Łukasz did a great job, thanks again for your time,
@fzabkar thanks also for bringing up the topic
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