Though solid-state drives are in vogue, market forces and technical issues are giving the venerable hard-disk drive new life.
DRAMexchange, a Taipei-based market intelligence firm, said last week that the adoption of solid-state drives by computer vendors has slowed as the price of the NAND chips--the raw material of solid-state drives--has increased. The firm also said that computer makers have been cautious about using solid-state drives because current Windows operating systems are not fully optimized for SSDs.
Numonyx NAND flash chip
(Credit: Numonyx)And the popularity of flash storage is waning in Netbooks. These tiny laptops at one time used solid-state drives almost exclusively. But Acer, Hewlett-Packard, Dell and others are moving en masse to configurations with large hard-disk drives in lieu of smaller-capacity solid-state drives.
SSDs typically offer higher performance--often much higher performance--than hard-disk drives and are more durable since they have no moving parts.
While those merits still apply, lingering doubts about the long-term retention of the data in a solid-state drive is making the hard disk look not quite so passé. Ed Doller, the chief technical officer of Numonyx, a flash memory chip maker which was spun off from Intel and STMicroelectronics last year, addressed this issue in a recent phone interview. Numonyx makes two kinds of flash: NOR, used for storing computer programs, and NAND, used widely as a data storage medium in digital cameras, media players, smartphones, and solid-state drives.
"It's if versus when. With a hard drive it's if it's going to fail. With an SSD, it's when is it going to fail," Doller said, who critiques NAND only because his company is looking for a new storage medium--such as phase change memory--that can overcome some of NAND's inherent limitations.
Doller spoke about an epiphany he had after booting up a 20-year-old IBM AT. "I fired that thing up and it actually booted from the hard drive. If that same computer had been built with a solid-state drive, I can almost guarantee you that would not have worked. It would have lost its information over that period of time," Doller said.
... Read moreThe largest hard-disk drive maker is going solid-state. Slowly.
Seagate will enter the market for solid-state drives in 2009, as it slowly embraces a technology that will, in some cases, replace its bread and butter: hard disks.
"Our history is based on rotating magnetic media. But as solid-state comes online, we're embracing this new media type," said Rich Vignes, senior manager of market development at the Scotts Valley, Calif.-based company.
Seagate's first target market will be large enterprise customers. Consumer SSDs from Seagate will come later. The challenge is to convince large enterprise customers that SSDs are safe. Although hard-disk drives have endurance problems of their own, corporate customers must be convinced that a technology as new as solid-state storage is reliable.
"There isn't really a clear way of describing endurance or life expectancy of a solid-state drive. So, we're working on that as an industry standard," through JEDEC, a large standard body, Vignes said.
The presence of large players such as Seagate will allay fears, he believes. "As companies like Seagate start to demonstrate field-proven reliability and endurance in enterprise applications, we'll overcome those (solid-state drive) endurance fears."
Analysts are bullish that, with time, SSDs will catch on. "SSDs offer much better MTBFs (mean time between failures) than HDDs, although the endurance is an issue that has to be addressed," said Gregory Wong, an industry analyst at Forward Insights.
"IT managers tend to be conservative, so the qualification time will be quite long--nine months to a year, and early adopters will be Web 2.0 companies such as Google, Facebook," Wong said.
Seagate, which will enter the SSD market in 2009, says there are challenges to make SSDs palatable to large corporate customers.
(Credit: Seagate)Seagate says it can tap into the decades of expertise it has in error correction. "Some of the skills we've picked up along the way, to deal with imperfect media, has applicability to dealing with imperfect media on NAND." All solid-state drives use NAND flash memory as the storage medium.
Fears aside, the lure of SSDs is speed--and this is what is driving Seagate into the market. "For SSDs, the play is performance, performance, performance. Did I mention performance?" Vignes said.
"SSDs have 100 times better random IOPS than HDDs," Wong said, referring to the dramatic speed advantage SSDs have over HDDs in handling input-output operations per second. Samsung has said in the past that companies such as Citibank and American Express peg server performance on IOPS.
Of course, it won't be a cakewalk for Seagate. There is plenty of competition already. Intel has started shipping SSDs for both enterprise and consumer markets. And Samsung is a leading player in the consumer market--its drives are used by Dell and Apple--and it is now stepping up efforts to snag corporate customers. On Thursday, Samsung announced that its SSDs have been selected, after extensive testing, for use in the Hewlett-Packard ProLiant blade servers.
"While for some companies, it's a new market and a new product, for us, it's an existing market, new product," Vignes said.
Seagate will get the raw material for SSDs--NAND flash memory--from others. "We're not going to make NAND. We are in discussion with all the premier NAND suppliers," Vignes said.
(Original CNET report here.)
Fujitsu is in talks to sell its hard disk drive business to Western Digital, according to a Japan-based report.
Western Digital is the second-largest hard disk drive maker in the world behind Seagate Technology. Fujitsu's HDD unit is ranked sixth.
Fujitsu would sell all of its plants--including those in Japan, Thailand, and the Philippines--for between 70 billion yen and 100 billion yen (approximately $660 million to $944 million), according to Japan's Nikkei news service.
This would be one of the largest business unit sell-offs for a Japanese electronics company, Nikkei said, adding that Fujitsu's hard disk drive business has been posting losses.
The deal would be finalized by the end of the year, according to Nikkei.
A Western Digital representative would not comment on the report.
Beyond the brutal price competition that is typical in the hard disk drive industry, there is a clear-and-present threat now from solid-state drives. Until this year relegated to digital camera and music player storage, solid-state drives are now making inroads--albeit small--in laptops, particularly ultraportables like the MacBook Air, Dell's new E4200 line, and Netbooks such as the Asus Eee PC.
Solid-state drive suppliers such Intel, Micron Technology, Samsung, and STEC are also beginning to target SSDs as replacements for hard disk drives in the enterprise.
First it was Intel. Now, Big Blue is keen on solid-state drives.
IBM said Thursday it is testing a 4-terabyte, high-speed solid-state drive array targeted at the enterprise, as the technology giant gives its imprimatur to flash-memory-based storage.
For years, flash memory cards--the first mass-market SSDs--have been limited to digital cameras and music players like the iPod. But SSDs are now poised to hit technological critical mass in terms of storage capacity, speed, and availability as they find their way into everything ranging from tiny netbooks to massive enterprise storage arrays.
High-performance enterprise storage is where IBM comes in. Engineers and researchers at the IBM Hursley development lab in England and the Almaden Research Center in California have demonstrated performance results that outperform the world's fastest disk storage solution by more than 250 percent, according to IBM.
Under the rubric Project Quicksilver, IBM coupled solid-state drives with its storage virtualization technology to achieve a sustained data transfer rate of more than 1 million input/output per second (IOPS), with a response time of less than one millisecond in a 4.1-terabyte rack of SSD storage. SSDs are being supplied by Fusion-io.
By comparison, Intel is commercially shipping SSDs (X25-E Extreme) that individually achieve random data reads of 35,000 IOPS and random writes of 3,300 IOPS. In a 3.8-terabyte storage array using 120 SSDs, Intel claims 4.2 million IOPS.
IOPS is a crucial benchmark for large customers that process credit card information or run reservation systems, for example.
"It's feasible that we could get it commercialized within 12 months," said Charlie Andrews, director of product marketing for IBM systems storage. "Right now we have a screaming (fast) system, but there's more work to be done in terms of long-term reliability and integration with systems applications. We don't want to get distracted with 'push the hardware.' We want to focus on the solution piece first," he said.
Compared with the fastest industry benchmarked hard disk drive system, Quicksilver not only improved performance by 250 percent but did this in less than one-twentieth of the response time, one-fifth of the floor space, and with 55 percent of the power and cooling requirements, IBM said.
"Performance improvements of this magnitude can have profound implications for business, allowing two to three times the work to complete in a given time frame for classic workloads," the company said in a statement.
IBM's said its first implementation of solid-state drives was for select IBM BladeCenter servers in June of last year.
Dell will sell you a 128GB solid state drive for an unprecedented $649. But wait. An IDC report claims the performance gap between solid state drives and lower-cost high-performance hard disk drives is not that significant at the system level.
Solid state drive offered by Dell
(Credit: Dell Computer)Solid state drives are attracting more scrutiny as they increase in capacity and decrease in price. (Dell's $649 drive is a radical price drop since many drives with half the capacity still sell for more than $700.)
Solid state drives (SSDs) are considered to be generally more power efficient, faster, and in some respects more reliable than hard disk drives.
IDC tested 2.5-inch 7200 rpm desktop drives against SSDs and found that previous tests comparing SSDs and hard disk drives may be misleading, according to SearchStorage.com, which cited the IDC report.
"Many tests have been done comparing 4200 rpm hard drives to SSDs," said IDC analyst David Reinsel. "But 5400 rpm is now mainstream and even 7200 rpm disks are available." The IDC report says the performance gap between computers with 7200 rpm 2.5-inch drives and those with SSDs was smaller than expected because the performance of the entire system must be taken into account.
(It should be noted that 4200 rpm hard disk drives are sometimes used in comparative testing because 4200 rpm drives are offered along with SSDs in laptops such as the MacBook Air and Hewlett-Packard 2510p.)
IDC's Reinsel also said that system redesigns will be necessary in both PCs and enterprise storage systems to reap the full benefits of SSDs. One of the challenges is that SSDs generally write data more slowly than they read data.
In related news, The Tech Report also did benchmarking of SSDs and 2.5-inch hard disk drives rated at 5400 and 7200 rpm. Generally, the SSDs were faster (in some cases much faster) but not in every benchmark and not by that much in some benchmarks.
SSDs have received a lot more attention since companies like Apple, Hewlett-Packard, and Toshiba have adopted them as alternatives to hard disk drives in laptops. Lesser known is that SSDs are also being deployed by large corporations in server-related applications. Companies like Citibank and American Express peg server performance on IOPS or input/output operations per second where SSDs beat hard disk drives handily.
The IDC report follows other reviews that claim solid state drives (SSDs) are not as power efficient as manufacturers claim--though the power-efficiency testing methodology used by some review sites has been disputed by manufacturers.
IDC abstract here.
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