Dienstag, 02. Juni 2009 21:32
\"fünfache\" Steigerung gegenüber was? ner Diskette?! (Ich weiss schon dass sie ne SSD meinen aber was für eine?
Dienstag, 02. Juni 2009 21:39
jo da ist was dran, mit den genannten Angaben kann man herzlich wenig anfangen.
Mittwoch, 03. Juni 2009 16:36
Donnerstag, 04. Juni 2009 12:00
Computex, Taipei, Taiwan, June 2, 2009 – SanDisk Corporation (NASDAQ:SNDK) today announced that it has begun shipping its next-generation flash memory-based solid state drives (SSD) for netbooks, offering high-performance components at a competitive price. SanDisk® pSSD™ P2 and S2 employ a new technology called nCache™, which improves netbook performance. The drives will be demonstrated at the SanDisk booth at Computex, Taipei, June 2-6, 2009: Booth # N709 Nangang Hall, 4th floor.
Netbooks are small, low-cost computers that offer consumers a highly portable means of surfing the Internet, accessing email as well as enjoying their favorite music and videos on the go. Market researchers, IDC, project consumer purchases of netbooks to rise from 11.5 million sold in 2008 to 50 million in 20131.
nCache: Advanced Technology for Faster Performance
SanDisk’s exclusive nCache technology is a non-volatile write cache capable of supporting burst performance up to five times the steady state vRPM2 to further enhance the user experience3. nCache improves user responsiveness and helps prevent incidence of “stalling” or “shuddering” often seen in first generation netbook SSDs.
The SanDisk pSSD P2 and S2 drives offer 9,000 vRPM of steady state performance in addition to nCache, which goes beyond this and offers a non-volatile cache of up to 320MB* to support bursts of random write commands maximizing system responsiveness. In addition, because nCache is non-volatile, the user’s data is protected in the event of a power interruption.
“Full-featured operating systems make tremendous demands in the storage device – writing large amounts of data in fast bursts using small random transfer sizes,” said Doreet Oren, director, product marketing, SanDisk. “SanDisk pSSD drives with nCache offer up to 50 times the random write performance of our first generation SSDs, delivering on the SSD promise for netbooks.”
Strategic Collaboration to Lower Netbook Costs
“As Netbooks migrate from retail stand-alone systems to operator-managed devices, many mobile network operators (MNOs) will consider Linux and netbooks with ARM processors for their low power consumption, low cost and greater customization capabilities,” said Tim Bajarin, president and principal analyst, Creative Strategies, Inc. “This enables key component suppliers to lower bill of materials costs without sacrificing performance or crucial equipment capabilities.”
Engineers from SanDisk and Canonical, the creator of the popular Ubuntu Linux-based operating system (OS), have worked closely on system optimizations for the Gen2 pSSD, resulting in improved system responsiveness and longer battery life.
“Canonical is enabling original equipment manufacturers (OEM) and designers (ODMs) to offer consumers a fantastic user experience with Ubuntu Netbook Remix running on netbooks,” said Chris Kenyon, director, OEM services, Canonical. “Our tests have shown SanDisk second generation pSSD equipped with nCache performing significantly better than a 5400 RPM HDD, providing Ubuntu users with the speed and stability that they need.”
SanDisk pSSDs are also ideal for use in netbooks equipped with ARM processors like Freescale’s i.MX515 device, which offers impressive performance at costs that let OEMs and ODMs meet critical price points. The processor’s advanced power management features extend battery life and eliminate the need for energy-sapping fans or costly heat sinks.
“All-day battery life is critical in the netbook space, where OEMs carefully evaluate each component for optimal energy efficiency,” said Glen Burchers, marketing director, consumer segment, Freescale. “Like Freescale’s i.MX51 processor, SanDisk’s pSSDs are designed with power management in mind, thus addressing critical market requirements.”
Available in capacities of 8, 16, 32 and 64-gigabytes (GB)*, SanDisk second-generation pSSD drives are attractively priced for segments such as Netbooks, POS terminals, printers, ATMs and other applications where users need HDD functionality with improved reliability, yet want to pay only for the exact capacity that they need.
SanDisk Corporation is the global leader in flash memory cards – from research, manufacturing and product design to consumer branding and retail distribution. SanDisk’s product portfolio includes flash memory cards for mobile phones, digital cameras and camcorders; digital audio/video players; USB flash drives for consumers and the enterprise; embedded memory for mobile devices; and solid state drives for computers. SanDisk is a Silicon Valley-based S&P 500 company, with more than half its sales outside the United States.
* 1 gigabyte (GB) = 1 billion bytes, 1 megabyte (MB) = 1 million bytes.
1. IDC, Worldwide Quarterly PC Tracker, June 2009
2. vRPM (virtual Revolutions Per Minute) - a metric to compare SSD performance in client PCs with theHDD and with other SSDs. vRPM = 50 / ((0.5 / 4kB random read IOPS) + 0.5 / 4kB random write IOPS))
3 Performance based on internal testing and projections may vary depending on host device.
So.. also 9000 "vRPM" (... lmao...)
wobei die Formel:
vRPM = 50 / ((0.5 / 4kB random read IOPS) + 0.5 / 4kB random write IOPS))
25 * (4kB random read IOPS + 4kB Random write IOPS)
(wenn ich das ma richtig umgerechnet hab...).
1. nervt mich, dass sie das schon mal so kompliziert aufschreiben, ist es doch ganz einfach.
und 2. man rechne, wenn das Ding gleichviel Random Read wie Write hat, dann ergibt sich aus 9000 vRPM
vRPM /2 /25 = vRPM / 50 = IOPS 4KB random
= 180 IOPS
= 720 KB/s
z.Vgl, 4KB random Write werte:
Velociraptor 400 IOPS / 1.56 MB/s
Vertex 120GB (used + voll) 1236 IOPS / 4.8 MB/s
Intel X25-M (used + voll) 5649 IOPS / 22 MB/s
nun gut.. normalerweise haben wie ja ne Massiv bessere lese-leistung als Schreibleistung - ausser der Controller cached.
D.h. ich würde mal sagen Random-Write sicher 3x langsamer als Read. Das macht dann bei Total 360 IOPS zusammen /4 = 80 -> 80 IOPS write und 240 IOPS Read.
5xfache verbesserung durch nCache = 400 IOPS Write und 240 IOPS Read.
Das wär dann grad mal auf dem Niveau der Raptor...
im ausgeglichsten Fall wäre der Write 5x langsamer als der Read, d.h. 360 / 6 = 60 IOPS -> 60 IOPS Write, 300 IOPS Read.
5x Verbesserung Write durch nCache = 300 IOPS Write und 300 IOPS Read.
Liegt wieder unter der Raptor.