TerraMaster Forum

I just bought the TerraMaster D4 SSD and use it on a HP Z4 G5 Workstation with Thunderbolt 4 card.

Problem:
Let´s say that i have four M.2 SSD´s installed all four of them appears in the Safely Remove Hardware making it cumbersome to remove when i use the Thunderbolt port on my computer. However, if i connect the D4 to a USB 3.2 port i get Eject TDAS in the Safely Remove Hardware and all four disks are ejected in one go.

Eject TDAS in the Safely Remove Hardware should be there when i use Thunderbolt as well. I always use Thunderbolt.

This happens when i use Storage Spaces in Windows 11 to RAID disks as well, so if i for example set up all four disks in a RAID 0 all four disks must be ejected though they appear as one (1) disk when i connect the D4 to Thunderbolt.

How can this be fixed?

RogerUsername wrote: ↑23 Apr 2026, 01:56just bought the TerraMaster D4 SSD and use it on a HP Z4 G5 Workstation with Thunderbolt 4 card.

However, if connecting the D4 to a USB 3.2 port, it gets Eject TDAS in the Safely Remove Hardware and all four disks are ejected in one go.

Eject TDAS in the Safely Remove Hardware should be there when using Thunderbolt as well.

…

How can this be fixed?

There's likely no way to "fix" that as that's the difference between using UASP over USB 3.2 versus native PCIe addressing on ThunderBolt; if the TDAS was connected to USB4, it'd be in the same situation as ThunderBolt if it successfully negotiated as a PCIe tunneled connection.

In USB mode, you eject the 'bridge chip,' whereas in Thunderbolt mode, you deal with a 'native PCIe drive.' If you seek Thunderbolt's ultra-fast performance, the current Windows mechanism will indeed recognize them as separate entities.

crisisacting wrote: ↑23 Apr 2026, 03:10There's likely no way to "fix" that as that's the difference between using UASP over USB 3.2 versus native PCIe addressing on ThunderBolt

CursaYang wrote: ↑23 Apr 2026, 16:11In USB mode, you eject the 'bridge chip,' whereas in Thunderbolt mode, you deal with a 'native PCIe drive.

Got it, thanks for your answers!