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Linear FlashLinear Flash is a PCMCIA flash memory format now used primarily in Cisco routers. Linear Flash requires no battery support, unlike somewhat faster SRAM, and features read/write speeds much faster than similar, less expensive ATA-type cards (which include Compact Flash and Memory Stick.) Linear Flash can also be read and written to by laptops and desktops with PCMCIA slots, and is somewhat popular for sensitive data storage because the media is non-volatile and does not degrade over time. However, large-scale storage is impracatical using Linear Flash because of small card sizes (typically under 40 megabytes) and prohibitive costs; megabyte-for-megabyte, Linear Flash cards are often dozens of times more expensive than ATA cards. Linear Flash cards begin to develop bad blocks after about 100,000 read/write cycle and thus are of dubious value on the second-hand market. Linear Flash cards were also the primary method of data storage for Apple's Newton MessagePad 100 series and 2000 series PDAs, and for some early Magic Cap, PocketPC and Windows CE PDAs. Major manufacturers of Linear Flash cards are Pretec, Smart and MagicRAM. Intel, which championed the adoption of the Linear Flash format, also manufactured cards.
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