Supported 4TB

[Frode]

[Frode]

You can safely ignore that. Should read somethig like

Each drive bay can hold one 3.5-inch SATA 1.5Gb/s, SATA 3Gb/s and SATA 6Gb/s hard drive. For capacity limitaitons (if any), please consult the table below.

Just my two cents.

OK. That's for the TS-239 and similar, but:
Does that mean that the old TS-209 will work with a HDD larger than 2TB, which is the clearly specified upper limit for that box Except for that the raid controller will not be able to make an array with larger disks than 1 or 1.5 TB.

[schumaku]

Does that mean that the old TS-209 will work with a HDD larger than 2TB, which is the clearly specified upper limit for that box

No, this does not apply to TS-109/209/409 at all.

Except for that the raid controller will not be able to make an array with larger disks than 1 or 1.5 TB.

Not corect ...
TS-109 models can work with a single disk volume on a 2 TB HDD.
TS-209 models can work with two 2 TB HDD, the storage voilume size can not exceed 2 TB (so either two single disk volumes, or a RAID1 [shadowed]) - but not a RAID0 or JBOD AFAIK.
TS-409 can work with up to four 2 TB HDD in any configuration AFAIK.

[Frode]

OK. Thanks.
Will go for 2x2TB single on the 209 then. It's my back-up box - receiving daily (nightly) backup data.