DatacenterDisk

HP 4TB (695510B21): Recording Status

We have not found a manufacturer document stating the recording technology for this exact part number. We know what the drive is - a HP 4TB SAS-6G hard drive (3.5") that we track - but a recording technology printed without a source is a guess, and for RAID, NAS or ZFS use that guess is the one that matters. That is a statement about what we have found, not about what HP has published.

What the part number decodes to

We hold no vendor document that defines the segments of 695510B21, so we do not decode it.

Live rankings this model belongs to: every 4TB hard drive · 4TB SAS drives · HP 4TB SAS. Product pages for this part number: HP 695510-B21 4TB SAS 6G (no current offer).

We hold no SAS model with a sourced recording technology to compare against, and a drive on a different interface would not be a fair comparison - so there is no nearest-model link here.

MakerHP
Capacity4TB
InterfaceSAS-6G
Recording technologyNo maker source found

No seller we track has 695510B21 in stock right now. That describes today's listings only - it says nothing about whether the model is discontinued.

How to settle it for this drive

Read the model number on the drive's own label, then find HP's data sheet or product manual for that family. A document that prints 695510B21 in its own row of a recording-technology table settles the question. A family page that names no part numbers does not: we have found maker pages that list neither a part number nor a recording method, and we no longer count them as sources. A retailer listing is not a source either - it is a seller's description, and sellers repeat what other listings say.

Documented HP drives at 4TB

We hold no maker document for any HP drive at 4TB yet, so there is no documented sibling to compare against.

When a source turns up

When we find a maker document that names 695510B21, this page will state the answer with that document linked and the date we read it, the same way our documented pages do. Until then, the honest answer is that we do not know.

In-stock drives with sourced CMR, 4TB and up