Here's a challenging problem for you guys...
I'm building a RAID-0 array with lots of channels. I'm trying to figure out which hard drives would perform fastest in it, since I've seen a great deal of variance in hard drive performance from manufacturer to manufacturer.
Just so everyone knows, this system will be built for throughput - 3Ware PCI-X raid card, dual xeons, and all - so more hard drives will not be maxing out any busses.
My initial reaction was Seagate 80GB drives, since they are very cheap for their size, and I could put six of them in the array to start with. I then looked at the 36GB Raptors, and according to benchmarks at storagereview.com they will transfer at about 1.8x the speed of the Seagate drives, cost about twice as much, and are theoretically more reliable (good thing to have in RAID-0) so I'm considering them too, but neither of those options are very good, here's why:
The seagate drives have a 1yr warranty, I'm afraid they might take to failing on me like my Maxtor drives have been for some reason. Given 6 of them in the array, that's a high risk. They also transfer very slowly for any kind of hard drive, I would prefer a better low-cost PATA option.
The Raptors are great... but they're SATA. A SATA 3Ware Escalade 8506-12 costs $700 or more, while a PATA 7506-12 costs $550. I could buy three more 80gig Seagates for that money. I also don't know how I would go about getting the system to work if I had some SATA and some PATA drives (I already have three 200gig drives for a RAID-5 array, a large investment that I don't want to trash.) I'm using hot-swap enclosures, and can't put a SATA->PATA converter on the drive itself (and put it in a PATA enclosure), it wouldn't fit inside the tray. I could put the Raptors inside a SATA enclosure and put SATA->PATA converters on the back of the enclosure. In fact, SATA enclosures are easier to come by than PATA enclosures. But then how would I put my existing 200gig PATA drives into an enclosure?
I need to use 5-in-3 enclosures like <A HREF="http://www.orbitmicro.com/products/accessories/removable hdd trays/BRIDE35.htm" target="_new">This One</A> to house my drives or I cannot fit my RAID card's maximum drive capacity into the case. (planning for the future.) A "universal" enclosure supporting both PATA and SATA at once would pretty much solve the problem, but where to find one?
The last problem is, I'm a bit wary of these converters. Should I be using devices that convert between PATA and SATA, in a high speed RAID configuration?
So if anyone knows of fast 20, 40, 60, or 80 gig drives that would help a lot. A good way of combining SATA and PATA drives on the same RAID card would be even better. The seagate was benchmarked at 43MB/sec max, 25MB/sec min, which is pretty slow, low density I guess, so I'm really hoping for some better options than I've been able to find.
I'm building a RAID-0 array with lots of channels. I'm trying to figure out which hard drives would perform fastest in it, since I've seen a great deal of variance in hard drive performance from manufacturer to manufacturer.
Just so everyone knows, this system will be built for throughput - 3Ware PCI-X raid card, dual xeons, and all - so more hard drives will not be maxing out any busses.
My initial reaction was Seagate 80GB drives, since they are very cheap for their size, and I could put six of them in the array to start with. I then looked at the 36GB Raptors, and according to benchmarks at storagereview.com they will transfer at about 1.8x the speed of the Seagate drives, cost about twice as much, and are theoretically more reliable (good thing to have in RAID-0) so I'm considering them too, but neither of those options are very good, here's why:
The seagate drives have a 1yr warranty, I'm afraid they might take to failing on me like my Maxtor drives have been for some reason. Given 6 of them in the array, that's a high risk. They also transfer very slowly for any kind of hard drive, I would prefer a better low-cost PATA option.
The Raptors are great... but they're SATA. A SATA 3Ware Escalade 8506-12 costs $700 or more, while a PATA 7506-12 costs $550. I could buy three more 80gig Seagates for that money. I also don't know how I would go about getting the system to work if I had some SATA and some PATA drives (I already have three 200gig drives for a RAID-5 array, a large investment that I don't want to trash.) I'm using hot-swap enclosures, and can't put a SATA->PATA converter on the drive itself (and put it in a PATA enclosure), it wouldn't fit inside the tray. I could put the Raptors inside a SATA enclosure and put SATA->PATA converters on the back of the enclosure. In fact, SATA enclosures are easier to come by than PATA enclosures. But then how would I put my existing 200gig PATA drives into an enclosure?
I need to use 5-in-3 enclosures like <A HREF="http://www.orbitmicro.com/products/accessories/removable hdd trays/BRIDE35.htm" target="_new">This One</A> to house my drives or I cannot fit my RAID card's maximum drive capacity into the case. (planning for the future.) A "universal" enclosure supporting both PATA and SATA at once would pretty much solve the problem, but where to find one?
The last problem is, I'm a bit wary of these converters. Should I be using devices that convert between PATA and SATA, in a high speed RAID configuration?
So if anyone knows of fast 20, 40, 60, or 80 gig drives that would help a lot. A good way of combining SATA and PATA drives on the same RAID card would be even better. The seagate was benchmarked at 43MB/sec max, 25MB/sec min, which is pretty slow, low density I guess, so I'm really hoping for some better options than I've been able to find.