The US Department of Defense has an often-quoted specification for data shredding on
magnetic disk media.
It has recently been doubling every 8 to 12 months in
magnetic disk storage and about every 24 months in MO storage, according to DISK/TREND, Inc., a market research firm in Mountain View, Calif.
Porting these products to 64-bit systems has allowed them to use more memory, although it is still secondary to their use of
magnetic disk.
"The parametric limit for
magnetic disk drive technology is about 16,000 Mbits/|cm.sup.2~, which gives us a lot of room for improvements," says Scranton.
Other types of nonvolatile microcircuit memories are available commercially, but
magnetic disks remain the cheaper alternative.
The speed of Harris County's current system is due partly to its use of AFIS 2000 technology: when Printrak installed Harris County's system, they included a two-finger
magnetic disk database, which allowed for much faster searches than an optical disk system.
Two
magnetic disks come standard with every Storage Machine.
Single-chamber design combines SEM with EDX and Auger spectroscopy to improve process development of
magnetic disks.
The RMD-5100-S delivers access times significantly faster than other magneto-optic drives, and faster than many fixed
magnetic disks, making the drive more than adequate as a primary storage device.
Systems using rewritable
magnetic disks cannot provide the same level of audit trail verification as true Write Once media and are challenged to meet archival storage regulations that demand stringent data authentication.
Conventional
magnetic disks store data in bits on the surface.
But with the use of a hierarchical storage server-high-speed
magnetic disks for fast active-file access and optical disks for long-term file storage-the impossible has come true.
