SAS: CARDS, ETC. WORTH THE MONEY?
- Thread starter Santilli
- Start date
Stereodude
Not really a
How would you notice it?
Pradeep
Storage? I am Storage!
In the ideal case such errors would cause a noticeable problem. Worse is the insidious silent corruption that goes unnoticed.
So David, would you buy this one or wait for other 6Bs cards?
ddrueding
Fixture
I have one in my newegg shopping cart right now. Next to the 7D and a printer. I wouldn't hesitate if I actually needed one. None of my SSDs saturate the bus yet, so there isn't a need. I also haven't seen a performance increase going to a dedicated RAID card vs. the onboard RAID for RAID-0.
I don't understand onbroad RAID 0. I recall the 10R allows that function somehow. Yet I'd rather use a PCIe controller if it naturally supports hot swapping. I'd rather have a single, faster drive than RAID 0. Eventually...
ddrueding
Fixture
Buying faster drives has always been more expensive than multiple drives. The reason RAID-0 wasn't as good before was that it didn't help access time. Now that access time is insignificant, RAID-0 is the affordable way to go. Even the faster SSDs out there just use internal RAID-0.
The ICH10R does RAID-0 just as well as the expensive expansion stuff. And your OS/swap drives can't be hot-swappable anyway
The ICH10R does RAID-0 just as well as the expensive expansion stuff. And your OS/swap drives can't be hot-swappable anyway
The ICH10R does RAID-0 just as well as the expensive expansion stuff. And your OS/swap drives can't be hot-swappable anyway
I might want to have a couple of drives in RAID 0, but use some other ports for backup drives that will be powered off most of the time. Hence there is a need for the hot swapping.
Santilli
Hairy Aussie
- Joined
- Jan 27, 2002
- Messages
- 5,078
Buying faster drives has always been more expensive than multiple drives. The reason RAID-0 wasn't as good before was that it didn't help access time. Now that access time is insignificant, RAID-0 is the affordable way to go. Even the faster SSDs out there just use internal RAID-0.
The ICH10R does RAID-0 just as well as the expensive expansion stuff. And your OS/swap drives can't be hot-swappable anyway
DAVID?
I notice a BIG difference in access time, due to the added processor and cache, both the 128 mb on the raid card, and, perhaps, the doubling of the cache on the drives.
I don't notice any increase over two drives in access time, in fact, it seems a bit slower the times I've done it. Don't know if actual tests back this up, but, that was my experience in Raid 0, with scsi and 15k drives.
ddrueding
Fixture
I was being specific to SSDs. As the latency of SSDs is so close to zero anyway, additional cache isn't going to get you anything.
ddrueding
Fixture
I think I'll start with just one
I think I'll start with just one
Let us know how it works out. I'd buy one, but it does nothing for my current hard drives or SSDs. I have to wait almost a year to build a new system.
Pradeep
Storage? I am Storage!
Well we would need to wait for PCI Express 3.0 capable boards at the very least?
Pradeep
Storage? I am Storage!
Bonus of 3.0 seems to be that in addition to doubling the transfer rate, overhead has gone from 20% to 1.5%
Pradeep
Storage? I am Storage!
http://theovalich.wordpress.com/2009/03/10/samsungs-24-ssd-video-reminds-us-of-all-the-speed-brakes/
Only 2GB/sec in this one
Only 2GB/sec in this one
Pradeep
Storage? I am Storage!
True but how many would have gone titsup from firmware incompetence? They might have needed double the number to bigin with
ddrueding
Fixture
True but how many would have gone titsup from firmware incompetence? They might have needed double the number to bigin with
Didn't lose any of mine.
I also thought it was interesting that anand initially didn't like the samsung drives as they had performance issues so seeing them pop up here in a deniable manner makes me think underground marketing. Course that was a different model right?
True but how many would have gone titsup from firmware incompetence? They might have needed double the number to bigin with
X25-E is fine. X25-M is the problem.
How is that LSI card working out for you? Is it possible to create separate arrays on the same controller without interference in performance? For example, I'd like to have two SSDs in RAID 0 and use the other ports for single drives.
ddrueding
Fixture
Didn't pull the trigger on that one. Got the OCZ Z-Drive instead.
Bozo
Storage? I am Storage!
I have done something similar with 3Ware controllers. 4- RAID 1's from the same card.
I thought about getting the smaller version of that OCZ unit, but it makes more sense to have a controller than can be used in the future with better SSDs. Unfortunately the OCZ is not a viable option anyway because there is only one free PCIe 8x slot and the computer must support 16 hard drives in total.
15% off the top.
ddrueding
Fixture
I was actually going to start playing today...that OCZ Z-Drive has an exposed SAS connector on the back side. I'm going to see what I can plug into it
ddrueding
Fixture
I suspect that it is an additional input to the SAS RAID card.