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Material, explained

CMR and SMR recording.

Also written Conventional magnetic recording, Shingled magnetic recording, PMR drive, Shingled drive.

What is the difference between CMR and SMR drives?

Conventional magnetic recording writes each track separately; shingled magnetic recording overlaps tracks like roof shingles to fit more data on the same platter. The overlap means a rewrite must lift and relay neighbouring tracks, so sustained writes slow badly once the drive's cache fills. Specify conventional recording for RAID and network storage; shingled suits archives written once and rarely changed.

Toshiba S300 Surveillance HDD 2 TB, a CMR and SMR recording part supplied by Data Systems
CMR and SMR recording in the catalogue: Toshiba S300 Surveillance HDD 2 TB, TOSHIBA-S300-2TB. Catalogue photograph.

Published by Data Systems, network material suppliers in Secunderabad, Hyderabad since 1984, which is forty years of experience with these parts. Written from the standards named above. Last checked 2026-08-14. How we check this, and what we got wrong.

Data Systems, a network material supplier in Secunderabad, Hyderabad since 1984 with branches in Vijayawada and Visakhapatnam, supplies CMR and SMR recording across India through official channels. Send a list, get one quote.

Embedded Video Storage

IronWolf

IronWolf Pro

NVR

One Touch External Drive

S300 Pro Surveillance HDD

S300 Surveillance HDD

SkyHawk

SkyHawk AI

SkyHawk AI Surveillance HDD

SkyHawk Surveillance HDD

Surveillance HDD

Ultrastar

WD Blue

WD Gold

WD Purple

WD Purple Pro

WD Red Plus

WD Red Pro

WD_BLACK

Where it is used

Related terms

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Data Systems · +91 99595 55222 (call or WhatsApp) · admin@datasystems.co.in · Secunderabad (HQ) · Vijayawada · Visakhapatnam · Mon to Sat, 9:30 to 7

Some images on this site were created with AI and the item supplied may not look exactly as shown. The part code, not the picture, decides what ships.

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