Is the LVM simply a software implimentation of RAID 0? what about the "dynamic drive" in windows 2k/XP? Is this also a software implementation of RAID 0? How do these solutions make 2 physical drives appear as 1 volume? if they are RAID 0 that answers the question but how do their performance compare to RAID solutions?
>From: Ed Wilts <[EMAIL PROTECTED]> >Reply-To: [EMAIL PROTECTED] >To: [EMAIL PROTECTED] >Subject: Re: hard drive performance >Date: Tue, 1 Oct 2002 10:18:34 -0500 > >On Tue, Oct 01, 2002 at 04:11:16AM +0000, Christensen Tom wrote: > > > > I am wondering about hard drive performance with large files. > > namely large video files/video editing. > > I have 2 120GB hard drives, I want them to appear as 1 volume, > > performance wise would RAID or lvm be better? > > if RAID which level 0-5?? > >Given that you have only 2 drives, you've only got 2 choices: RAID 0 >(Striping) or RAID 1 (Mirroring). > >No matter what, put each drive on a dedicated IDE channel for best >performance. > >RAID 0 will stripe the data across both drives. A single drive failure >will cost you the data on both drives. > >RAID 1 will mirror the data and allow you to have access to your data in >the event of a single drive failure. > >There are *MANY* implementations of RAID 1, in both hardware and >software. You'll need to look at the specific implementation details to >see which is best for you. Some implementations will always read from >one member until the member fails, at which point they'll read from the >other member (in all cases, writes have to be done to both members). >Some implementations round-robin between members, and some look at the >response time of each member to see which drive can return the data the >fastest. Don't forget that the members don't have to be identical. >Nothing prevents you from doing a software mirror of a 5400rpm IDE drive >with a 15Krpm SCSI drive. > >There are tradeoffs involved. You may want to look at IDE RAID cards >(Promise and Highpoint come to mind) or you may to look at a pure >software solution. You may need to benchmark the solutions - there is >no guarantee that a hardware solution is faster than a software solution >- this may depend on the speed and load of your system and the price and >specs of the hardware controller. > >Cheers, > .../Ed >-- >Ed Wilts, Mounds View, MN, USA >mailto:[EMAIL PROTECTED] >Member #1, Red Hat Community Ambassador Program > > > >-- >redhat-list mailing list >unsubscribe mailto:[EMAIL PROTECTED]?subject=unsubscribe >https://listman.redhat.com/mailman/listinfo/redhat-list _________________________________________________________________ Join the world’s largest e-mail service with MSN Hotmail. http://www.hotmail.com -- redhat-list mailing list unsubscribe mailto:[EMAIL PROTECTED]?subject=unsubscribe https://listman.redhat.com/mailman/listinfo/redhat-list
