Unbrick with Clean 03.04.01-230 Bittorrent FIrmware

My Cloud OS 3 Personal & Network Attached Storage My Cloud
16

Instead of removing the internal HDD to perform a backup, I did this in SSH on WDMC

WDMyCloud:~# dd if=/dev/sda of=/shares/Private/backup/MyWDBackupImage.img bs=1M count=5000
5000+0 records in
5000+0 records out
5242880000 bytes (5.2 GB) copied, 145.187 s, 36.1 MB/s

This created a “MyWDBackupImage.img” file. Is this ok w/o having to remove the internal HDD to create a recovery image?