To form a planet, one probably needs a relatively quiet environment so that dust can settle into a thin, dense disk
layer," Kalas says.
Russia-based in-line inspection (ILI) service provider Spetsneftegaz NPO uses E-Disk
solid state flash disks
to store information gathered during its pipeline inspections, also known as pigging.
For example, tier-1 storage might hold mission-critical or recently access files on RAID disk
arrays; tier-2 storage might house operational or seldom-used files on less expensive media in a storage area network (SAN); while tier-3 storage maintains event-driven or rarely-used files on tape media.
Opening Keynote address presented by Mark Kryder from Seagate Technology: 50 Years of Disk
Drives -- And the Exciting Road Ahead.
Inherent issues with tape--in particular, issues with data streaming (on the backup side) and multiplexing (on the restore side), as well as ongoing issues with drive and media reliability, and the increasing affordability and availability of SATA-based disk
backup options, have led many users recently to re-evaluate their existing backup and recovery procedures and implement disk
--either as virtual tape, as a disk
backup/recovery target, or as a host-based option.
Over time, gravity causes material in this so-called protoplanetary disk
to clump into planet-size objects.
Available products: CheckIt, Disk
Technician Pro, System Sleuth.
Well for one, when media is removed from a secure data center, whether tape or disk
, it can be dropped, stolen, or exposed to environmental conditions such as extremely high or low ambient temperatures or humidity levels.
The cosmic collision jumbled all the stars that were then in the disk
, says Gerard Gilmore of the University of Cambridge in England.
Data once written to disk
by the publisher cannot be erased or overwritten but can be read many times.
While no formal standard specifications on RAID 6 have been published to date, a disk
array configuration that can provide failure protection to more than one hard disk
is called RAID 6.
Calculations indicate that most of the grains in a debris disk
quickly spiral toward the star or get ejected from the system.
Most snap-shot technologies tend to be reasonably efficient in their use of disk
space, storing only changes to stored data rather than whole copies of changed files.
Astronomers believe that planets assemble from the flattened disk
of gas, dust, and ice thought to encircle young stars.
In this article, we compare the data throughput capability of three of the most popular enterprise-class and near enterprise-class disk
connection protocols: Ultra 320 SCSI, SAS, and SATA.