Softraid overhead cpu how to#
Softraid overhead cpu driver#
Softraid overhead cpu software#
Softraid overhead cpu mac#

300 GB drives have 4 MB or 8 MB caches usually so throughput is not significantly increased.

For example a 3 drive RAID5 composed of 300GB disks probably averages 60 MB/s (as a file server) and when there is 500 GB of files stored on it the average access latency for the days work will be somewhere between 10 and 20 milliseconds. The difference in drive size (platter density) can be dramatic in terms of seek speed (latency), W/R speeds, and throughput. Every other aspect has overhead to spare. It's really all about the drives when talking small implementations. Again the differences won't be measurable.

Softraid overhead cpu mac#

If you suddenly come to your senses D) and go for an intel based mac like the 2006 for about $1k, the 2008 for about $2k, or the 2009 for about $3k then there is also no difference in throughput between the embedded RAID controller that comes with the machine(s) and just about any card under $500 or so. They're all so close to the same I doubt throughput speed differences are measurable at all. I also seriously doubt you will notice any difference at all between any RAID card under about $500.

And even though you say you don't need a lot of storage space it is the larger drives that will be the fastest - for several reasons. It's the drives that will make the biggest difference when we're talking about 4 drives or less. I'd go with 10 if you're after high availability (uptime), and 5 if you need greater throughput than 10 for a 4 disk set.įor the setup you have and are thinking about the PCI plays very little roll or perhaps none at all - reasonably speaking. In either case, you need a backup, and I'll presume you have one, even though it's not mentioned.

Softraid overhead cpu driver#

You also have the option of doing a 4x type 5 set, and a separate disk for the OS, or increase it to all 5 disks and place the OS on it (assuming that card will boot OS X, as it looks only to be driver support from what I can see off Highpoint's site). It's easier to solve RAID issues this way, as you won't have to reinstall the OS if the array dies (not just operate in degraded mode).

Softraid overhead cpu software#

If you go for the software method, you use 4x for files, and can stuff the OS on a separate drive. You could go either way, and given the idea of 5 or 10 as array types, 10 would be doable by OS X, and is more redundant than 5, which would require a hardware controller. Get a Sonnet G5 Jive, which brings it's total drives to 5, so that should solve the physical mounting issue for you. I mostly don't know how much of a factor the older standard PCI slot plays into overall speed. So there's a lot of different ways to go here, I'm just wanting to see what would be at least as good as what we've had. If we do this, we have a few choices - two RAID 1's (one for boot & one for files) a single RAID 5 (with or without a separate drive for boot) a RAID 10 (probably partitioned for boot & files). Option B) Throw our old Highpoint RAID card on a PCI slot and use that to connect 2-4 internal SATA drives (using kit to mount extra drives if needed). If I do this, I'm curious if I should partition the RAID to have the boot drive be on this as well? Any dangers of not being able to boot or fix RAID if there are RAID problems? Option A) Throw a couple 'enterprise' SATA drives in internal bays and use software RAID (Apple or other) to make RAID 1. So I'm trying to choose between a few simple setups, wondering about overall throughput mostly: It has 2 internal drive bays, and 3 regular old PCI slots (not PCI-X or PCIe). Our 'new' server will be a G5 1.6Ghz single processor tower (2003). This has been pretty solid for the last few years. It is an old G4, with a Highpoint 1820a RAID card connected to 3 internal SATA drives on a RAID 5. Our current server is starting to crash a lot, so it needs to go. And we don't even need that much total space - we've lived fine for a couple years with only 360GB total. Our needs aren't crazy, we aren't doing any streaming video - mostly file serving.

Softraid overhead cpu how to#

Hi, I'm trying to get clarity on how to best setup a RAID for our 'new' server.