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thus Drew spake:
To make it short: Have a x345 here with ServeRAID ?? (Adaptec ASR-2020S). As soon as I realized I have to install additional SW and the HBA has no decent BIOS, I ripped it out of the machine and went mdadm.
The x345 seems to be a bad example, the speed on the ServeRaid adapter in there really sucked, I am seeing better throughput with mdadm on there too.
With other machines I really didn't have problems with ServeRaid, except if you suddenly get one of those ServeRaid cards which can only do RAID1 or RAID0 :)
The 7k model on this one does RAID 5 and the two non-standard 5E & 5EE versions. The performance on the contoller is not bad given that the RAID is hung off either the PCI-X133 or PCI-E busses (forget which). Both CentOS & Win2k03 performance is adequate.
Mine stuck in the PCI-X133 (the x345 doesn't have PCIe). It should be able to provide decent performance. However, even given that decent software for management is provided, I like to go the ``it's already supported out of the box by the OS installed'' approch (I must confess that I really like OpenBSD in this regard)...
As an aside, I'm still running tests on Samba 3 as a AD domain member and aside from having to chmod 777 the root of the fileshare to allow the ACL's to work properly everything is fine. But that's an issue for another list.
Best,
Timo