TerraMaster Forum

I am running low on disk space on my D5-300C in the RAID array from the disks in bays 1 and 2. I want to replace the 4 TB disks with 8 TB or larger disks. I can't find explicit instructions on this in the manual or here, so I'm asking for guidance. Would this sequence of actions work?

• Backup the RAID to a separate disk

• Power the unit down

• Replace the 4 TB disk in bay 1 with an 8 TB disk

• Power up and leave the disks to mirror

• Power down again and replace bay 2 disk with an 8 TB disk

• Power up and leave the disks to mirror again

Would it be feasible to hot-swap disks (that is, remove a disk and replace it while powered on)?

Thanks for any guidance.

If you are using an array, unfortunately, you can only backup the data first and then rebuild them with new hard drives.

TMzethar wrote: ↑27 Apr 2023, 21:47 If you are using an array, unfortunately, you can only backup the data first and then rebuild them with new hard drives.

Thanks for the quick reply. That is more or less what I was expecting to do. But it would be good to know whether I can hot-swap the disks or whether I can only swap them while the unit is powered down (I realise that I can only replace one at a time).

Thanks,

Ian.

Sorry, this won't work, even if you replace all disks with 8T. The only way is to rebuild it.

This was a very useful thread.

I am in the process of transferring a data backup to the new sized (larger) RAID 1 storage.

It would be a very nice feature for your next product that the data could be transferred within the D5-300C rather than having to use the host though the USB interface; or allow for the resizing of of a RAID 1 even if it has to happen in 2 RAID rebuilding cycles.

OK - I am trying to do the same (going from 8TByte to 12 TByte). If the D5-300C cannot resize by inserting larger HDD one at a time, and rebuilding in 2 raid rebuild cycles, would this work?

- remove HDD1 from the raid drive and insert it as stand alone drive (slot3,4,5). Remove HDD2 (put it in the bank safe).
- insert new HDD's in slot1 and 2 initiate this as raid 1 drive.
- copy data from original HDD (now in slot 3,4 or 5) to Raind drive (slot1,2).
(Still need to copy the data, but at least it will go from disk 3,4,5 to raid1 in slot1,2...so no need to go over USB?

I never tested if there is a difference in speed between internal D5-300C transfers, and external (PC)

PortlandJH wrote: ↑07 Feb 2025, 08:40

viewtopic.php?p=43208#p43208
Hi.
D5-300C does not support replacing two disks by two synchronization cycles to expand capacity and retain data.
Even after the operation is completed, the capacity of RAID1 is still 8T.
You can only backup your data and create RAID1 from scratch.
RAID Manager is not applicable to D5-300C, which does not require any control software.
Generally speaking, 1 green and 1 orange blink in RAID1 means that it is being synchronized.