Earlier this week I ordered an MS-01 12900H and was planning to use it with a QNAP TL-D400S as a replacement/upgrade for a 10+ year old HP Microserver.
However, since I originally looked at this a couple of weeks ago, it has become very hard to find the TL-D400S in stock - even on the QNAP site. Are there any good alternatives for a compact 4 or 5 bay DAS, plus an HBA that will definitely fit/work in the MS-01? Preferably "just works" rather than self-build (though will consider latter at a pinch).
Or am I going to have to fall back to connecting it to a NAS? I've looked at a TerraMaster F4-424, but it would require replacing one of my gigabit switches to allow aggregation of the 2 x 2.5 GB ports on the NAS and/or SFP+ connectivity to the MS-01. As I have an Omada network, the minimum appears to be the TP-Link TL-SG3210XHP-M2 (8 x 2.5G, 2 x SFP+). But that switch alone costs more than the TL-D400S. The switch + NAS together are much more expensive, for a result that doesn't feel as neat and provides a third of the I/O bandwidth of the QNAP QXP-400eS-A1164 adapter bundled with the D400S.
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EDIT: Since writing, I've found a sole TL-D800S in stock at a local UK reseller. Slightly bigger and more expensive than I'd hoped for with the TL400S, but close enough, so ordered it. It'll give me space for a hot spare for the ZFS pool, at least.
Re-reading the original STH MS-01 review, I'd somehow missed the reference to LSI SAS 3008 (9300-8e) compatibility which answers the HBA question above, and paired with say a refurbed HP MSA-60 disk shelf might have been a very cost-effective + expandable option - if I had the space and noise tolerance.
Someone also privately pointed out that an OWC Thunderbay 4 Thunderbolt-attached NAS might be a possibility, and would be a neat one physically. However, it's only 20% cheaper than the TL-800S for half the bays and seems to be a road less travelled.