OK, I think I've decided to do raid in linux's mdadmin tool.
So, now I just need to find a card or cards that will support 8 drives each with it's own channel. I have failed to find a non-raid card larger than a 2-channel card. All the ones more than 2 channels are labeled 'raid'.
I know many have warned against Promise, but I think that is mainly due to their use as raid devices. I know they do some 4 channel cards - do they work ok in that mode? I know the 2-channel 'RAID' card works as a plain IDE controller. Anyone have a 4-channel one? Anyone care to guess?
Max.
Max Waterman wrote:
Yan-Fa Li wrote:
Not sure what it is you are looking for ? Low price or port density. One trades off the other. Just one rule, stay away from Promise. Pretty much everything available today is good enough.
OK :)
I quite like the Silicon Image 680 based cards. Very cheap and work quite well. I've used CMD based cards reliably over the years. HighPoint has reasonable driver support for the 37X family. Some of the newer chipsets are beta. Anything that's not SATA should have excellent support. 3Ware is good choice if you have lots of money and need lots of density per PCI slot or 64bit support.
Check the archives for the recent RAID thread, it rehashes almost everything you want to know. Just remember with that many drives you're ultimate gate is PCI 32bit/33MHz performance. Which realistically is about 40-80MB/s depending on wether you're reading or writing. To get any higher you'll need PCI-X or PCIe.
Hopefully the new NForce4 boards which are about to hit the market will give us PCIe for Athlon 64.
Thanks. I'll take a look at the thread. Seems like 3ware is one to look at; not that I have lots of money. Perhaps they'll be cheaper here (Beijing).
Anyway, thanks.
Max.
Yan
Max Waterman wrote:
While I am waiting for opinions, I am coming to the conclusion that Highpoint is a name to look for.
Is this right?
Max.
Max Waterman wrote:
Hi,
I am trying to build a MythTV/dvarchive box. I bought 4 Promise Ultra100TX2 PCI cards, but found that they wouldn't work
with more than 2 in a system :(
I was going to use linux s/w raid over the drives.
I know you guys must use plenty of raid setups, so thought you'd be the best to advise on which types are best.
I am running FC3, and have 4 WD800/8 and 4 WD2000/8 drives that I want to be two RAID5 volumes. I am running
on a nForce3 250Gb, so network traffic is not a problem with the PCI bus, but gfx/video output maybe is (I haven't
chosen my final gfx/video setup, but am currently using a cheap TNT2 gfx card).
I heard that Promise is giving 'lack-lustre' Linux support, so I'm totally open to not using Promise cards. I also heard
that cards which do h/w RAID will give less load on the PCI bus.
How should I do this? What h/w?
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