Raid 5 Recovery

Update 12-27-2025: All data recovered and on another server. Thanks for all the help !

Update 12-26-2025: I was able to copy the partiton table from sda to the rest of the drives and import the array. Checking a few files across the array and there seems to be no issues yet. Started a full copy.

First please don’t say restore from backup as there is no backup. This was there backup target, that then they just started writing files to and not saving them to there computer then letting the computer backup to the nas.

This nas is a family nas that was not setup by me. But as the tec guy in the family it has turned into my proublem. They were running 4 drives in a raid 5. The nas failed and would not boot. I labled the drives and pulled them out and put them into my testing server to see what was going on. I found all 4 drives showed up but 3 out of the 4 appeared to me missing the sda3 partition that I beleave to have all the data. Is there any way I can recover that sda3 partition?

root@tempnas:~# lsblk

NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS

sda 8:0 0 5.5T 1 disk

├─sda1 8:1 0 517.7M 1 part

│ └─md127 9:127 0 517.7M 0 raid1

├─sda2 8:2 0 517.7M 1 part

│ └─md123 9:123 0 517.7M 0 raid1

├─sda3 8:3 0 5.4T 1 part

│ └─md124 9:124 0 0B 0 md

├─sda4 8:4 0 517.7M 1 part

│ └─md126 9:126 0 448.1M 0 raid1

└─sda5 8:5 0 8G 1 part

└─md125 9:125 0 0B 0 md

sdb 8:16 0 5.5T 0 disk

└─sdb1 8:17 0 517.7M 0 part

└─md127 9:127 0 517.7M 0 raid1

sdc 8:32 0 5.5T 0 disk

└─sdc1 8:33 0 517.7M 0 part

└─md127 9:127 0 517.7M 0 raid1

sdd 8:48 0 5.5T 0 disk

└─sdd1 8:49 0 517.7M 0 part

└─md127 9:127 0 517.7M 0 raid1

• This topic was modified 4 days, 19 hours ago by rolivef.