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Legacy Forums => Experienced User Forum => Topic started by: John Simons on May 06, 2002, 09:28:09 AM

Title: Software RAID
Post by: John Simons on May 06, 2002, 09:28:09 AM

How many people here are using the software RAID?

Title: Re: Software RAID
Post by: Filippo Carletti on May 06, 2002, 03:18:01 PM

Many.
I use it in production since 1998 when it was alpha. It's rock solid.

Title: Re: Software RAID
Post by: Nathan Fowler on May 06, 2002, 05:41:18 PM

I use it; no problems.  Allthough it is rather difficult to upgrade a RAID-1 mirror set to a larger drive capacity.  Very little CPU overhead, IDE bus doesn't get over-loaded as much as you would think.  All things considered, it is an excellent option for fault tolerance.  If you have the drives I strongly recommend using it.

Nathan

Title: Re: Software RAID
Post by: dj_ramjet99 on May 07, 2002, 02:47:36 AM

Is it possible to have no RAID on your system disk and RAID on your /home/e-smith/files directory if its mounted on separate disks?

I have an old SCSI that I want the OS on but two new big SCSI disks I would like to RAID for the important data. Can this be done?

Title: Re: Software RAID
Post by: Nathan Fowler on May 07, 2002, 04:50:13 AM

Yes this is possible and easily accomplished.  I recommend reading the Raid-HOWTO for general information but to summarize it involves:

Creating a Raid-1 Array
  Partitioning the disks
  Formatting the disks
  Editing /etc/raidtab
  Creating the array

Updating the file system
  Updating /etc/fstab to point to /dev/mdX where X is the array number.

Title: Re: Software RAID
Post by: Tom Carroll on June 17, 2002, 10:26:03 AM

Nathan, do you have a link to the software raid how-to?

With the dropping prices for 7200rpm 80gb disks, I may pick up another maxtor now and set up a raid-1 mirror on my system.

Tom

Title: Re: Software RAID
Post by: Karl Ponsonby on June 17, 2002, 12:57:58 PM

I've just setup a new Server with 4 ScSi disks in a raid setup.
The O/S is on a pair of 4.5g's (raid 1) , and the /home (which includes ibays and users profiles) is on a pair of 18g drives (raid 1)