Re: Difference between IDE and SCSI ??

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Ben Kamen wrote:

In the beginning, SCSI was always faster than IDE because the intelligence of the drives (remember, IDE tends to be dumb as it's controlled by the host), that lent the drives to be more expensive. So think "server" and thus smarter, more expensive also demanded "faster".

Scsi needs less intervention by the main CPU but that doesn't necessarily translate to 'faster'. The overall time is going to be limited by the seek and transfer rate of the drive itself, which is often identical between IDE and Scsi models. The tradeoff in cost of putting intelligence on peripheral devices and the value of those extra main CPU cycles (often spent waiting idly in is single-user computer anyway) has bounced back and forth over the years. In a file server with lots of drives, scsi is usually a big win compared to typical ide controllers because it lets all the disks seek independently at the same time. However even that isn't quite so simple, since specialized controllers like the 3ware raid cards can do the same with ide drives and also offload the work from the main CPU.

--
  Les Mikesell
   lesmikesell@xxxxxxxxx

--
fedora-list mailing list
fedora-list@xxxxxxxxxx
To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list
[Index of Archives]     [Older Fedora Users]     [Fedora Announce]     [Fedora Package Announce]     [EPEL Announce]     [Fedora Magazine]     [Fedora News]     [Fedora Summer Coding]     [Fedora Laptop]     [Fedora Cloud]     [Fedora Advisory Board]     [Fedora Education]     [Fedora Security]     [Fedora Scitech]     [Fedora Robotics]     [Fedora Maintainers]     [Fedora Infrastructure]     [Fedora Websites]     [Anaconda Devel]     [Fedora Devel Java]     [Fedora Legacy]     [Fedora Desktop]     [Fedora Fonts]     [ATA RAID]     [Fedora Marketing]     [Fedora Management Tools]     [Fedora Mentors]     [SSH]     [Fedora Package Review]     [Fedora R Devel]     [Fedora PHP Devel]     [Kickstart]     [Fedora Music]     [Fedora Packaging]     [Centos]     [Fedora SELinux]     [Fedora Legal]     [Fedora Kernel]     [Fedora OCaml]     [Coolkey]     [Virtualization Tools]     [ET Management Tools]     [Yum Users]     [Tux]     [Yosemite News]     [Gnome Users]     [KDE Users]     [Fedora Art]     [Fedora Docs]     [Asterisk PBX]     [Fedora Sparc]     [Fedora Universal Network Connector]     [Libvirt Users]     [Fedora ARM]

  Powered by Linux