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kashani wrote: |
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|
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> Doug Brown wrote: |
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> |
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>> My mobo's chipset (nvidia nf 4) doesn't support raid real well, and I |
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>> have read that Linux Software raid is very good. I am getting ready |
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>> to install Gentoo 2005.1 64bit real soon (I am new to Gentoo), and I |
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>> was wondering what types of raid it supports. I know it supports 0 |
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>> and 1, but I am more interested in raid 0+1 and 1+0. |
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> |
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> |
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> Linux software raid is capable of doing all the usual stuff as |
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> well as RAID 0+1 or 1+0. I'd want a RAID 0 stripe of mirrored RAID 1 |
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> sets rather than mirroring two RAID 0 sets, but my requirements may |
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> not be yours. |
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> |
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> Assuming this is a small home system I'd go with RAID 5 with maybe |
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> a hot spare if I have more than four drives in a normal server setting |
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> where reads happen more often than writes. That's more space with |
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> comparable performance for anything you're likely to be doing. If you |
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> really need the performance spend the money on a real RAID card with |
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> local cache. The difference is night and day. |
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> |
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> kashani |
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|
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RAID 5 support in Linux is good. I have been using RAID-5 for my home |
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fileserver (4x40GB IDE disks) and it has worked flawlessly, and has been |
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a lifesaver when one of my drives failed. |
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|
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I have a page devoted to setting up RAID on linux quickly (gentoo and |
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debian) , you can find it at http://ziva-vatra.dnsalias.com/~ognen/ |
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under "Software RAID5 Project". And if you want more info look at the |
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"RAID Overview" Section. |
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|
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Linux kernel 2.6 has added support for new RAID levels (including |
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RAID6) but some people are saying that other RAID Implementations (such |
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as RAID-5) have better performance on the 2.4 kernels. |
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|
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I have found Linux Software RAID very useful and reliable. While |
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probably being beaten in the performance area by hardware |
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implementations, I have to say it does do the job well, and I have no |
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issues using it both in my home server and in Commercial implementations |
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(have used RAID-5 and RAID-1 software with 5 SCSI drives on a dual PIII |
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Gentoo LTSP server, it worked well, but there were issues regarding the |
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SCSI hardware (like no hotplug support for the disks) ). |
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|
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Google about, and look at the gentoo-wiki site. |
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|
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Essentially it depends on what you are looking from your RAID setup. For |
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me it was re-using componets I already had and price (it cost me a total |
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of £8 to build my RAID Setup). Performance was not an issue because my |
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two 10mbit networks (one wireless @ 11mbit) were unlikely to push the |
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RAID performance to its limits. |
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-- |
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