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Slim internal Blu-ray writer with matte black bezel

LG Electronics

LG Electronics BU40N blu-ray burner 6x BD-R 24x CD-R 4 MB cache

SKU CH-34ZQ-MMTTB MPN BU40N

An ultra-slim internal SATA Blu-ray writer that reads BD-ROM at 6× and writes BD-R at 6× with 4 MB cache

  • Interface typeSATA
  • Cache memory4 MB
  • BD-ROM access time250 ms
  • BD-R speed6X
  • BD-RE speed2X
  • DVD+R write speed8X
  • Writes Blu-ray discs at 6× speed for fast backups
  • Reads CDs at 24× for quick data access
  • Rewrites CD-RW media at 16× for flexible storage
  • 4 MB cache smooths data flow during burns
  • Ultra-slim 0.4" height fits thin laptop bays

Internal slim Blu-ray writer for laptops

The LG BU40N is a half-height SATA drive that reads and writes BD-R at 6x and BD-RE at 2x, while handling CD media at 24x read and write and 16x rewrite. It fits ultra-slim bays and targets users who need optical archiving or disc playback in space-constrained systems.

SATA interface and 4 MB buffer

The drive connects through a standard SATA data and power interface and uses a 4 MB cache to smooth data flow during burning. Buyers who need a different host interface or a larger buffer for high-throughput duplication should look elsewhere.

Sustained write speeds across formats

DVD+R and DVD+RW media write at 8x, while DVD-R writes at 8x and DVD-RW at 6x. Dual-layer BD-R DL and DVD+R DL both record at 6x, and DVD-RAM is supported at 5x for random-access backup workloads.

How it compares

Measured against everything we stock in Blu-Ray Disc Writers, at today’s prices. Recalculated every night.

Price $70.99
Cheaper than about 83% of the 33 comparable items (median $108.99).

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Specifications

Product
Brand nameLG
Model nameBU40N
Panel colorGray
Product typeInternal Blu-ray Burner
Storage
Cache memory4 MB
BD-R speed6X
BD-RE speed2X
DVD+R write speed8X
DVD+RW rewrite speed8X
DVD-R write speed8X
DVD-RW rewrite speed6X
CD-R write speed24X
CD-RW rewrite speed16X
DVD+R DL write speed6X
DVD-R DL write speed6X
DVD-RAM speed5X
DVD-ROM speed8X
CD-ROM speed24X
Loading mechanismTray
Ports & slots
Interface typeSATA
Size & build
Overall dimensions0.3 in × 5 in × 5 in
Shipping weight0.14 kg
Package size149 × 131 × 23 mm
Compatibility
Supported operating systemsWindows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista, Windows XP
More details
BD-ROM access time250 ms
BD-R DL6X
BD-RE DL2X
BD-ROM6X

Questions about this item

What does the 6x BD-R write speed mean when I am actually burning a disc?

The drive can write a single-layer Blu-ray recordable disc at up to six times the base Blu-ray speed, which is the maximum rate this model supports for BD-R media.

Which interface does the BU40N use and what does that limit?

It uses a SATA connection, so the drive's data transfer is limited by the SATA link speed of the host system.

What physical space do I need to mount this drive?

The BU40N is an ultra-slim internal drive measuring .4 inches high, 5 inches wide and 5 inches deep, and it weighs 4.48 ounces.

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