Toshiba MG vs N300: Enterprise or NAS Drive, Read From Toshiba's Own Documents

Toshiba MG vs NAS: what each Toshiba document rates the drive for

Both lines come from one maker, which makes this a cleaner comparison than most. The N300 is Toshiba's NAS drive, available up to 22 TB and rated for NAS systems with up to 8 drive bays. MG10 and MG11 are its enterprise capacity drives, and we have not found a bay limit stated in their overviews. The ratings show how differently Toshiba expects each to be used. N300 figures here come from Toshiba's N300 datasheet dated 06/2025.

The workload row carries the most weight. MG is rated for 550 TB a year, a little over three times the N300's 180 TB, and Toshiba's MG Series page ties its warranty and reliability commitments to annual workload not exceeding 550 TB. The MG11 overview spells out the conditions behind its MTTF: 8760 power-on hours a year, 550 TB a year and an average HDA surface temperature of 40 C or less. The N300's 1.2M hours is printed on its 22 TB page, so read the two MTTF figures as Toshiba's ratings, not as a test of either drive.

The bay count matters in a different way. If your NAS has more than eight bays, the N300 sheet does not cover it. If it has four, both lines are within what Toshiba states, and the choice comes down to workload, warranty and price.

Toshiba N300 vs MG at 14TB to 22TB: idle watts side by side

Both Toshiba documents print active idle in watts at each size, so this is the comparison the two lines support most directly. Bulk numbers are from the 06/2025 N300 datasheet; MG numbers are the 512e SATA models.

The two lines track each other closely. The widest gap is at 16 TB, where the MG11 prints 3.66 W against the N300's 4.14 W; at 18, 20 and 22 TB they sit within 0.06 W, and at 22 TB the figures are the same 4.35 W. On power, then, choosing the NAS drive saves nothing and choosing the enterprise drive costs nothing. The 12 TB N300, HDWG51CUZSVA, prints 3.30 W, at a size where the MG11 overview has no model.

Transfer rates print the same digits in different units. The N300 datasheet gives 281 MB/s sustained on each page from 12 TB to 20 TB, and the MG11 overview gives 281 MiB/s from 14 TB to 20 TB. MB/s and MiB/s are different units, so these are not the same figure, and we have not found a Toshiba document that sets the two lines side by side. The MG10 prints 268 MiB/s. Buffers differ more plainly: 512 MB on the N300, 512 MiB on the MG10 and 1 GiB on the MG11.

Toshiba N300 vs MG noise: the same idle number, two labels

On its 12 TB to 22 TB pages the N300 datasheet prints 20 dB typical under the label Acoustics (idle mode). The MG10 and MG11 overviews print 20 dB at idle labelled sound power, with the MG11 method based on ISO 7779, and add a seek figure of 32 dB. We have not found a seek figure on Toshiba's N300 datasheet, and on its 4 TB to 10 TB pages the idle figure is 34 dB.

Both print 20 dB at idle, from two documents with different labels. That is close enough to say neither line is the noisy one on Toshiba's own figures, and not enough to call them equal: we have not found the words sound power, or a measuring method, on the N300 sheet. For a quiet room the idle figure is the one that matters most, and on that the two are not separated.

Toshiba N300 vs MG prices on Amazon.co.uk

New rows on Amazon.co.uk, pounds sterling inc VAT, lowest price per TB at each matched size. A dash means one side has no in-stock row at that size right now.

Two cautions on the tables. The N300 table can also hold N300 Pro rows, which is a different product with its own datasheet, so check the title on each row. Some N300 listings give no part number at all, so they cannot be matched to a datasheet page. The MG table matches MG10 or MG11 in the title and can include MG10-D drives at 8 TB and 10 TB, a different series. Recording technology prints only where a document names the part number.

Toshiba MG or N300 for a NAS or small server

• Up to 8 bays and under 180 TB a year of reads and writes: the N300 is inside its rating, with a 3-year warranty.
• More than 8 bays, or traffic that could pass 180 TB a year: the N300 sheet does not cover it, and MG is rated for 550 TB a year.
• Longer warranty: MG, at 5 years on Toshiba's MG Series page.
• Idle power and idle noise: within half a watt and both 20 dB on Toshiba's documents, so neither is a reason to choose.

Whether a particular NAS accepts either drive is for the NAS maker's compatibility list. Toshiba's enterprise generations have their own UK pages at Toshiba MG10, Toshiba MG11 and the Toshiba MG series, and the NAS line has Toshiba N300.