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and has not been archived to tape); it does not have to be "re-assembled" as it would in tape implementations that rely on multiplexing to boost backup performance.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.
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.