Laptops Dropped the Hard Drive — This Year's Supply Was Sold Out by January — Woody Magazine

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Laptops Dropped the Hard Drive — This Year's Supply Was Sold Out by January

The first hard drive, unveiled 70 years ago, was never the fastest place to keep data. It was the middle shelf. This year, the middle shelf ran out.

Edited by Woody

In Three Lines

Hard drives have all but vanished from laptops. Yet in late January, Western Digital said its 2026 output was essentially sold out.
The buyers are the cloud giants building AI data centers. Their reason for buying spinning disks when flash is faster goes back to the first hard drive.
This is not a claim that hard drives beat SSDs. Hard drives have never been the fastest storage available, not even on day one.

Nobody shopping for a laptop asks about the hard drive anymore. The spec sheet says SSD, and the spinning disk has become something people find when they clear out an old desktop. A metal platter whirling under a moving arm sounds like a machine the chip age should have finished off. That is a reasonable assumption.

On Jan. 29, Western Digital's chief executive, Irving Tan, told analysts something that did not fit that picture. "We're pretty much sold out for calendar '26," he said. The company had firm orders from its seven largest customers for the year. It had also signed long-term agreements with two of them running through 2027, and with one through 2028.

The year was not yet a month old, and the factories' output already had owners.

The buyers are data centers

On the same call, Western Digital reported $3 billion in quarterly revenue. Cloud customers accounted for 89 percent of it. Retail and other consumer products accounted for 5 percent, or $5 of every $100.

Seagate, its main rival, is in the same position. On July 28, it said data centers took about 90 percent of the storage capacity it shipped. Most of its high-capacity data-center drives, it added, were already spoken for under agreements running into 2028. Only three companies still make hard drives at all: Seagate, Western Digital and Toshiba.

The hard drive left the laptop. It went to work somewhere most of us never see.

That raises an obvious question. AI runs on fast chips, so why would the companies building it buy up slower spinning disks? It is a fair thing to ask, and the answer starts at home, with books.

Anyone with too many books ends up sorting them three ways. The ones you are reading sit on the desk. The ones you open now and then go on the shelf. The ones you rarely touch go into boxes in the basement. The desk is within arm's reach, but small. The basement holds plenty, but finding one book means unpacking a box. The shelf sits in between: a step away, and roomy.

The first hard drive, unveiled 70 years ago this month, was that shelf.

September 1956: fifty platters on one spindle

In mid-September 1956, IBM announced the 305 RAMAC, an accounting computer. A team led by Reynold Johnson built it at the company's laboratory in San Jose, California. Its Model 350 disk storage unit was the first commercial hard drive.

Fifty metal platters, each two feet across, spun on a single shaft at 1,200 revolutions per minute. Each platter carried 100 recording tracks, and together they stored 5 million characters. IBM's manual called that the equivalent of 62,500 punched cards. In today's units it comes to roughly 4 megabytes, about the size of one or two phone photos.

The storage unit alone weighed more than a ton. IBM leased the system for $3,200 a month, which is more than $35,000 in today's money. A few test machines reached customers that year, and regular deliveries began in mid-1957.

The name says what the machine was for. RAMAC stood for Random Access Method of Accounting and Control. Random access means going straight to the record you want, instead of reading through everything in front of it.

IBM was thinking about a bookkeeper

IBM's 1958 reference manual explains the machine with an office scene. Before accounting was mechanized, a clerk posted each transaction as it came in. A purchase of raw material meant opening the cash ledger and the raw-material ledger. A shipment meant opening inventory and accounts receivable. The work was slow and prone to error, but the books were always current.

Mechanization lost that, because finding and changing a single record in a large file was hard. Punched cards had to be filed by hand. In the manual's inventory-and-billing example, the cards passed through seven different machines. Magnetic tape kept records in a single line, so reaching one meant reading past everything ahead of it. Cards and tape were the boxes in the basement.

The RAMAC held 50,000 records of 100 characters each and could reach any of them without scanning the ones in between. IBM figured a typical installation would handle about 10,000 transactions in an eight-hour day. That is one every three seconds or so. The machine gave the bookkeeper's method back.

A faster shelf sat inside the same machine

The disk was not the fastest memory in the RAMAC. The processing unit also held a magnetic drum that spun at 6,000 revolutions per minute, one turn every hundredth of a second. Programs and the records being worked on lived there. A magnetic-core unit, which passed data along at each transfer, held just 100 characters.

The drum stored about 3,200 characters. The disk held more than 1,500 times as much. Finding a single record on the disk, though, took about six-tenths of a second on average. In that time, the drum turned 60 times.

1,500x How much more the RAMAC's disk held than its drum. The trade-off: finding one record took as long as 60 turns of the drum.

Put it in bookshelf terms. The core and the drum were the desk. The disk was the shelf. Cards and tape were the boxes. The hard drive was born in the middle.

Slower than the desk, quicker to search than the boxes. The hard drive started out on the middle shelf.

Still three shelves

Seventy years on, chips have taken the desk. An SSD reads and writes far faster than a spinning disk. The laptop became a machine that needs only a desk.

Data centers are different. On the January call, Tan described the big cloud companies as skilled at managing costs by moving data among tiers of SSDs, hard drives and tape. As AI shifts from training models to answering requests, he argued, it generates data faster. Much of that data, he said, will end up on hard drives.

In July, Seagate's chief executive, Dave Mosley, said cloud providers have long layered memory, SSDs and high-capacity hard drives to balance performance and cost. That approach, he said, is now spreading to other businesses. Newer AI cloud operators and model developers are starting to adopt it.

Why not simply build more drives? Mosley's answer was to store more data on every disk instead. He called that the fastest and most capital-efficient path to more storage, with drive output held roughly steady.

There is a second objection. Flash has tended to get cheaper over time, so won't the shelf turn to silicon too? Perhaps, someday. This year went the other way. SSDs are built on NAND flash chips. In late March, the research firm TrendForce forecast that NAND contract prices would rise 70 to 75 percent in the second quarter. In August, it reported that suppliers had raised prices so sharply that the five largest NAND brands saw revenue jump 77 percent from the first quarter to the second. The desk got more expensive, not bigger.

When the desk costs more, a bigger share of each day's new books goes on the shelf.

A library that can't buy shelves

The Internet Archive shows who gets squeezed first. The San Francisco nonprofit preserves old web pages, among much else. It holds about 210 petabytes and adds roughly 100 terabytes a day. That is three or four 30-terabyte drives filled every day.

In early May, its founder, Brewster Kahle, told 404 Media that the 28- to 30-terabyte drives it prefers were either unavailable or very expensive. The Wikimedia Foundation, which runs Wikipedia, told the same outlet it was feeling the strain in memory and drive purchases and in server lead times.

The library that keeps the web's past is coming back from the store without shelves.

The first hard drive was never the fastest storage in the room. It found records faster than tape and held more than a drum. What the cloud giants had locked up by January is that same middle shelf. No company can keep every book on the desk. Only the laptop could give up the shelf.

Sources

Source ↗ IBM, "Reference Manual: 305 RAMAC" (A26-3502-0), 1958
Source ↗ Computer History Museum, "1956: First commercial hard disk drive shipped"
Source ↗ Computer History Museum, "Memory & Storage" timeline
Source ↗ ASME, "IBM 350 RAMAC Disk File," engineering landmark citation
Source ↗ StorageNewsletter, "History: First HDD 55 Years Ago From IBM at 100" (2011), quoting IBM's 1956 announcement
Source ↗ Computerworld, "Computer History Museum to highlight storage" (2010)
Source ↗ "IBM 305 RAMAC," Wikipedia (drum capacity per the 1957 operating manual; lease price in 2025 dollars)
Source ↗ Western Digital, "Western Digital Reports Fiscal Second Quarter 2026 Financial Results" (Jan. 29, 2026)
Source ↗ Western Digital, Form 10-Q for fiscal Q2 2026, "Organization and Basis of Presentation" (definition of the Consumer end market), SEC
Source ↗ Western Digital fiscal Q2 2026 earnings call transcript, The Motley Fool
Source ↗ Seagate, "Seagate Technology Reports Fiscal Fourth Quarter and Fiscal Year 2026 Financial Results" (July 28, 2026)
Source ↗ Seagate fiscal Q4 2026 earnings call transcript, Investing.com (July 28, 2026)
Source ↗ Zacks, "Seagate Technology Q4 Earnings Call Highlights AI Storage Demand" (July 29, 2026)
Source ↗ heise online, "WD and Seagate confirm: Hard drives for 2026 sold out" (Feb. 16, 2026)
Source ↗ Gillware, "The 2026 Hard Drive Supply Chain, Mapped" (July 2026)
Source ↗ TrendForce, "AI Server Demand to Drive Memory Contract Price Increases in 2Q26 as CSPs Secure Supply via Long-Term Agreements" (March 31, 2026)
Source ↗ TrendForce, "Combined Revenue of Top Five NAND Flash Brands Rises 77% QoQ in 2Q26" (Aug. 18, 2026)
Source ↗ Tom's Hardware, report on the Internet Archive and Wikimedia drive shortages (May 8, 2026)
Source ↗ Network World, "Hard drive shortages are putting the squeeze on enterprise storage buyers" (May 13, 2026)
404 Media, interviews with Brewster Kahle and the Wikimedia Foundation, May 2026

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