Huawei OceanStor and Dorado NVMe SSD spare parts (976 P/Ns)

What the 976 part numbers actually split into

A list of nearly a thousand NVMe part numbers looks uniform and is not. The official descriptions separate them along four independent axes, and a part can carry more than one at once.

The counts overlap on purpose: an encrypted palm drive is counted under both form factor and security. That is why the columns add up to more than 976.

Palm drive or 2.5-inch — the split that decides the order

787 of the 976 NVMe part numbers — 80.6% — are palm drives, a 7-inch bare module used in the high-density enclosures of the Dorado V6 range. The remaining 182 are 2.5-inch modules that go into a standard front bay. The two are not interchangeable in either direction: a palm drive has no 2.5-inch casing, and a 2.5-inch module does not fit a palm slot.

• The form is written in the official description as Palm Disk Unit(7″) or Disk Unit(2.5″). Read that string before matching on capacity.
• High-density enclosures take palm drives almost exclusively, so a site running those shelves will rarely need a 2.5-inch NVMe part — and the reverse is also true.
• Capacity overlaps between the two forms. A 3.84TB palm drive and a 3.84TB 2.5-inch module are different part numbers with different model lists.

Two capacity sequences run in parallel

Read down the columns and two product lines separate cleanly. The palm drive column follows the 1.92 sequence — 1.92, 3.84, 7.68, 15.36, 30.72, 61.44 TB — which is the Dorado V6 drive line. The 2.5-inch column carries both that sequence and a 3.2 sequence — 3.2, 6.4, 12.8, 25.6 TB — which belongs to the OceanDisk 300P and 500P drives, a PCIe 5.0 line with its own model list.

• 3.2, 6.4, 12.8 and 25.6 TB exist only as 2.5-inch parts. If you need one of those capacities in a palm slot, it does not exist.
• 480 GB and 960 GB appear only as 2.5-inch parts, in single figures — they are edge cases, not the volume SKUs.
• The largest capacity, 61.44 TB, is almost entirely palm drive. High-density shelves are where that capacity is meant to go.

SCM is not a faster NVMe — 8 part numbers

Eight part numbers in this list are SCM, Storage Class Memory, and they appear in both form factors. They are not capacity drives. SCM sits between DRAM and flash in the memory hierarchy and is used where write latency and endurance matter more than cost per terabyte — cache tiering, metadata, journal volumes.

Treating an SCM part as an inexpensive way to add capacity is a mistake that shows up later: the endurance and the cost profile are wrong for that job, and the pool may not accept it as capacity at all.

Encryption: 208 part numbers carry it

208 of the 976 NVMe part numbers are encryption variants. They are separate part numbers, not a configuration option on the same part, and the distinction decides whether the drive can join an encrypted pool at all.

• Mixing encrypted and non-encrypted drives in one encrypted pool is not supported. The pool will either reject the drive or fail to come up.
• If the array is not configured for encryption, an encrypted drive still works as a drive — but you are paying for a capability you are not using.
• Confirm the encryption state of the existing pool before ordering a replacement, not after the drive arrives.

68.8% of the list fits exactly one model

671 of the 976 NVMe part numbers are qualified for a single storage model. Another 148 fit two or three. Only 13 fit ten or more. That is the opposite of the optical module list, where more than half the part numbers fit ten or more models, and it is why NVMe drives are the category where a cross-reference from memory goes wrong most often.

A single-model part is not a defect. It means the drive was qualified against one platform’s controller firmware and drive list, and qualification is what makes it work. The practical consequence is that capacity and form are not enough to order from — the model has to match.

Capacity bands and how far each one reaches

The larger capacity bands tend to carry fewer part numbers but similar model reach, because a high-capacity drive is usually qualified for a whole platform generation rather than for a single system.

The platforms that carry the most NVMe part numbers

These are the platforms with the widest NVMe configuration range, not necessarily the most common in the field. If your system is on this list, the chance that the exact drive you need is in the catalogue is high; if it is not, check the model matrix before assuming the part does not exist.

Full part-number list, 976 P/Ns

Sorted by capacity, then part number. The Models column is the count of storage models the part is qualified for; Replaces shows the official substitution and its direction.

Before you order an NVMe drive

• Read the form from the description — palm drive or 2.5-inch. Capacity alone does not identify the part.
• Confirm the model, not the family. Dorado V6 covers several platforms with separate drive lists.
• Check whether the pool is encrypted. If it is, the replacement has to be the encryption variant.
• Check whether the drive is SCM. If the slot is being used as capacity, an SCM part is the wrong part.
• If the part number carries a -001 or -002 suffix, quote the suffix as well — it is a different FRU.

Frequently asked questions

What is a palm drive?

A 7-inch NVMe module used in Huawei high-density enclosures. It is a bare module rather than a 2.5-inch cased drive, so it will not fit a standard front bay — and a 2.5-inch module will not fit a palm slot.

Can a Dorado V6 take an OceanStor V5 NVMe drive?

Only if the part is qualified for both in the catalogue. 671 of the 976 NVMe part numbers fit exactly one model, so this is the category where an assumption costs the most.

Is SCM just a fast NVMe drive?

No. SCM is a different media class used for cache tiering, metadata and journal volumes. It is not intended as capacity, and treating it as capacity gets the endurance and cost profile wrong.

Do these include the carrier?

The official description states it. Where the description is silent, ask before ordering — a drive without its carrier cannot be fitted into a bay that expects one.

Can I mix encrypted and non-encrypted NVMe drives?

Not in an encrypted pool. The encryption variant is a separate part number for that reason.

Why is the model count low on so many rows?

Because the drive was qualified against one platform’s firmware and drive list. A count of one is a qualification statement, not a data gap.

Is a larger NVMe drive always a valid upgrade?

No. Capacity expansion within an enclosure follows defined combinations, and the controller may cap the usable capacity per shelf.