Recovery speed, in particular, can be notably faster: Data can be accessed directly from
disk (assuming the data still resides on
disk and has not been archived to tape); it does not have to be "re-assembled" as it would in tape implementations that rely on multiplexing to boost backup performance.
For this reason, WORM
disk technology is becoming more widely accepted for audit, archive and imaging applications.
The team calculates that the inner edge of the
disk is only twice as far away from the hole's center as is the event horizon.
Astronomers used to think that all protoplanetary
disks are shaped basically like Frisbees.
*1 As of July 14, 2005, based on a JVC survey, no other consumer camcorder offers a built-in hard
disk drive and MPEG-2 recording.
Policies in the 2.0 release include the ability to retain key data on
disk for faster recovery of historical information, automated creation of up to four copies of data for redundant protection, and retention of local copies of data after a copy has been exported.
Second, unlike
disk or RAM, tape is inherently sequential and imposes delays on retrieving any file housed on a physical data set.
If an entry-level RAID controller costs $800 while a standard controller costs $400 and its 9GB drives cost $800 each, a
disk drive subsystem would cost $3,200; users would be paying a 38% premium for RAID-5 protection.
If compressing your entire hard
disk makes you apprehensive or you don't need that much added space, there is an intermediate solution: zipping individual files or programs and storing them in compressed form either on a hard
disk or on some other convenient medium.
The computer had a screen with 320 by 200 resolution, I believe, no hard
disk drive (I added one later), 128 K of RAM, and a 14 inch color monitor.
Today, the bank can store an entire month's reports and records on a single 940-MB write-once
disk for about $145.
Disks are numbered as they are filled up, and stored in numerical order with a listing of files written on the outside of each
disk.
New images from Hubble's Advanced Camera for Surveys provide firm evidence of the second
disk, David Golimowski of Johns Hopkins University in Baltimore and his colleagues report in the June Astronomical Journal.
This technology is significantly different than magnetic
disk and tape emulation since the Write Once properties of UDO are inherent to the recording surface of the media and are not a function of software or firmware controls.
Advanced Digital Information Corporation (Nasdaq:ADIC), supplier of intelligent storage solutions for the open system market, announced recently an expansion of its Pathlight VX disk-to-tape backup solution that will bring the benefits of
disk performance, RAID fault tolerance, and an integrated path to tape to a larger community of IT end users.