Free planning tools for datacenter storage buyers and administrators.
Pick a used server, a backplane configuration, drives and memory. Carriers are added automatically, every line is priced live, and the total is split honestly between live parts and chassis.
Model AI server RAM and enterprise SSD capital expense across a fleet. Compare live DDR5 RDIMM and enterprise SSD pricing, future scenarios, DIMM feasibility and budget share.
Open Calculator →Size AI inference KV cache across HBM, shared DDR5 memory and NVMe fallback. Estimate capacity, bandwidth, DIMM count, enterprise SSD count and tier cost.
Open Calculator →Calculate the true 5-year total cost of enterprise storage including capital cost, power, cooling and drive replacement.
Open Calculator →Calculate usable capacity, storage efficiency and estimated rebuild time for any RAID level with any drive configuration.
Open Planner →Find the real net cost of upgrading NAS drives to larger capacities — live new and refurb prices minus what your old drives resell for, per added usable TB.
Open Calculator →Price a complete NAS at live prices: pick bays, RAID level and drive capacity, and compare every in-stock enclosure plus drives per usable terabyte.
Open Builder →Calculate what it costs to fill Synology's RS11626xs+ with live HDD prices, RAID 6 or RAID 10, expansion planning and support-status comparisons.
Open Calculator →Pick your server, set a capacity target, and get population-valid RAM configurations priced from in-stock modules. Enforces slot count, speed and per-DIMM limits from the OEM manual.
Open Finder →Size a local AI model library from approximate published model footprints, add headroom, and get a recommended drive capacity with the cheapest in-stock drive at that tier.
Open Calculator →8 in-stock listings · SATA CMR, ranked by live cost per terabyte · ranked by live cost per tb, refreshed about once a day
| Drive | Capacity | Interface | Recording | Condition | $/TB | Price | |
|---|---|---|---|---|---|---|---|
| Toshiba MG07ACA14TE 14TB SATA Enterprise MG07ACA14TE | 14TB | SATA-6G | CMR | REFURB | $25.00 | $350 | Buy on Amazon |
| WD Ultrastar DC 20TB Renewed WUH722020BLE6L4 | 20TB | SATA-6G | EPMR | REFURB | $28.50 | $570 | Buy on Amazon |
| WD DC HC550 18TB SATA 512MB Enterprise WUH721818ALE6L4 | 18TB | SATA-6G | EPMR | REFURB | $28.89 | $520 | Buy on Amazon |
| Seagate Exos X16 16TB ST16000NM001G | 16TB | SATA-6G | CMR | REFURB | $29.37 | $470 | Buy on Amazon |
| HGST Ultrastar He10 10TB SATA NAS HUH721010ALE600 | 10TB | SATA-6G | CMR | REFURB | $31.90 | $319 | Buy on Amazon |
| WD Red Pro 18TB WD181KFGX WD181KFGX | 18TB | SATA-6G | CMR | REFURB | $32.72 | $589 | Buy on Amazon |
| Seagate Exos X24 24TB ST24000NM002H | 24TB | SATA-6G | CMR | REFURB | $33.29 | $799 | Buy on Amazon |
| Seagate SkyHawk 6TB ST6000VX001 ST6000VX001 | 6TB | SATA-6G | CMR | REFURB | $33.33 | $200 | Buy on Amazon |
8 in-stock listings · ranked by live cost per gigabyte · ranked by live cost per gb, refreshed about once a day
| Drive | Capacity | Condition | $/GB | Price | |
|---|---|---|---|---|---|
| SK Hynix 64GB DDR4-2400 ECC RDIMM HMAA8GL7MMR4N | 64GB | REFURB | $4.92 | $315 | Buy on Amazon |
| A-Tech 16GB DDR4-2133 ECC RDIMM M393A2G40DB0-CPB | 16GB | NEW | $5.44 | $87 | Buy on Amazon |
| Supermicro 64GB DDR4-2666 ECC LRDIMM B07DFLTWN3 | 64GB | NEW | $6.23 | $399 | Buy on Amazon |
| Samsung 64GB DDR4-2666 ECC RDIMM M393A8K40B22-CWD | 64GB | NEW | $6.23 | $399 | Buy on Amazon |
| A-Tech 64GB DDR4-2666 ECC LRDIMM B0BPN414ZJ | 64GB | NEW | $6.41 | $410 | Buy on Amazon |
| Samsung 16GB DDR4-2133 ECC RDIMM M393A2G40EB1-CPB | 16GB | NEW | $7.12 | $114 | Buy on Amazon |
| MICRON 32GB DDR4-2400 ECC RDIMM MTA36ASF4G72PZ | 32GB | NEW | $7.19 | $230 | Buy on Amazon |
| A-Tech 32GB DDR4-2666 ECC RDIMM B0BPN4FLDX | 32GB | NEW | $7.40 | $237 | Buy on Amazon |
These exist because three specific decisions come up constantly and none of them is answerable from a price table alone. What a drive costs is the easy part; what it costs you over five years, how much usable space survives parity, and whether a module fits the board you own are the parts that actually decide a purchase, and each needs arithmetic rather than a listing.
The RAID planner is the one most people need first. Buying storage means buying a configuration, and the gap between raw and usable capacity is larger than newcomers expect: eight bays of 12TB drives is 96TB of hardware and 72TB of RAID 6 space before the filesystem takes its share. It also surfaces the constraint nobody plans for, which is that filling every bay on day one turns the next upgrade into a full replacement rather than an addition.
The TCO calculator answers a different question, and it is the one that changes minds about recertified drives. Purchase price is a single number; power draw over five years is a recurring one, and at electricity rates in much of the world the running cost of a spinning array is a meaningful fraction of what the drives cost. A cheaper drive that draws more can lose over the life of the machine, and that only becomes visible when both sides are on the same sheet.
The memory finder exists because server RAM compatibility is unforgiving in a way storage is not. A drive that does not fit is obvious immediately. A module that is the wrong rank, the wrong voltage or unbuffered where the board wants registered will often post and then behave badly, which is a far worse failure mode than not working at all.
None of them predicts prices, and none of them tells you a drive will fail. Both are forecasts dressed as calculations, and the inputs that would make them honest do not exist publicly. What these tools do is arithmetic on numbers you supply and prices we can verify, which is a narrower promise and one we can keep.