How to Properly Install and Use TOS 7 on the 425 Plus Series TNAS

New system installation, system re-install
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lw123
Posts: 2
Joined: 04 Jun 2026, 19:33
Great Britain

Re: How to Properly Install and Use TOS 7 on the 425 Plus Series TNAS

Post by lw123 »

CursaYang wrote: ↑11 Jul 2026, 08:02
Din0 wrote: ↑10 Jul 2026, 19:59
If you are not using Slot 3, there is no impact, and you can upgrade directly to TOS 7.
Could you please specify whether this is also the case if one is using Slot 3, just not as a system disk? I have an SSD in Slot 3 but the system disk is on two SSDs in Slots 1 and 2 in RAID1.

My 425 Plus has one of the older BIOS versions (MTWL0101.V05) but in the systems settings I get an update notification for version 7.0.0747. I am currently on version 6.0.794. Can I just go ahead with the update? Sorry, I find this all very confusing.
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TMjack
TM Support
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Joined: 27 Oct 2020, 08:41

Re: How to Properly Install and Use TOS 7 on the 425 Plus Series TNAS

Post by TMjack »

If the SSD installed in the NVMe 3 slot is not used as a system drive, upgrading to TOS 7 will not be affected in any way.
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