Does QNAP support SHR-like flexible RAID?

SHR's headline trick is using mixed drive sizes efficiently in one array. QNAP does not offer a direct equivalent, so if that specific capability is why you are asking, the honest answer is no, not like SHR.

What QNAP does instead

QNAP uses standard RAID levels (RAID 1/5/6/10, plus RAID 50/60 on larger units). In a classic RAID array with mismatched drives, the array sizes to the smallest drive and the extra capacity on larger drives goes unused: the limitation SHR was built to avoid.

QNAP's flexibility comes from a different direction:

• Storage pools: combine one or more RAID groups into a pool, then carve multiple volumes from it.
• Thin provisioning: allocate volume space on demand rather than up front.
• Multiple pools: group like-sized drives into separate pools so no capacity is stranded, instead of forcing everything into one mismatched array.

Practical takeaway

If you want to mix odd drive sizes in a single efficient array, Synology SHR does that natively and QNAP does not. If you buy drives in matched sets, which is good practice anyway, QNAP's standard RAID plus storage pools gives you plenty of flexibility with no efficiency penalty. Either way, use CMR NAS drives; the table lists options.