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ACARD DDR2 RAM Disk

Yeh, pretty much any ramdisk will saturate i/o bandwidth. Raiding them, in some cases, doesn't improve performance. A lot of the bottlenecks are in a sata/raid controller's processing ability, as many of them are designed in consideration that conventional hdds cannot use all the sata bandwidth. Also, the internal i/o and processing abilities of the ramdisk itself.
I will tell you this though- I've read a lot of reviews on the gigabyte iram, and even ddr1 has enough throughput to saturate sata bandwidth.
Do these things work w/ ECC-capable ram?
 
once SATA 6GB/s is released these things will probably make a much bigger difference performance wise than they do now. i still wouldnt want to use one for data storage though, volatile ram on a battery doesnt mean the data is safe
 
Originally posted by: faxon
once SATA 6GB/s is released these things will probably make a much bigger difference performance wise than they do now. i still wouldnt want to use one for data storage though, volatile ram on a battery doesnt mean the data is safe
Click to expand...

It seems to indicate that it backs up and restores to a compactflash card inserted in the front. I don't know how or when it does that, however, since it says it is driverless. So perhaps it loads on power-on, and saves on power-off, hopefully the battery lasts long enough to save!
 
Wish we could get a review of these drives. Jaw-dropping performance shown on their website, wonder how they would bench against SAS 15k drives, 10k Velocis and the Intel MLC/everyone else's SLC SSDs.
 
Originally posted by: VirtualLarry
It seems to indicate that it backs up and restores to a compactflash card inserted in the front. I don't know how or when it does that, however, since it says it is driverless.
Click to expand...

it does a backup/restore automatically at power loss/power on or manually whenever you push the button


Originally posted by: VirtualLarry
So perhaps it loads on power-on, and saves on power-off, hopefully the battery lasts long enough to save!
Click to expand...

that's what the battery is there for

they also sell an external power adapter to the memory remains powered even when the computer is off so you don't have to wait for a restore from CF when booting
 
Nice work there, Dave!

Could you give us some random write graphs? That's where I think these drives are going to totally rock.

Biggest advantage will probably be capacity. 4GB limit on the i-RAM is too low to be of much use. Even populated with 2GB sticks one of these would hit 16GB which is more useful (example: rip 8.5GB DL DVD and encode to 4.5GB SL format all on the one speedy drive).
 
Get some ideas from here and the following pages. I'm really curious how it stacks up against that Intel SSD so those benches are what you want to compare to anyway.
 
I have to get a compatible video card: my server is running a 6-year-old remote management card (Megarac G2) that doesn't cut the mustard for that software.

In the mean time, enjoy the following complements of Acard:
http://www.acard.com.tw/english/newstabpop.jsp?idno=87

I can tell you that in my testing, I am getting 180MB/s in single drive mode using RAID0, 240MB/s using dual-drive mode (as shown in my Web page) and only a little over 300MB/s using dual-drive mode and 2 iRams to make a 4x4GB RAID 0 array. I suspect that my RAID card is a limiting factor (Promise ex8350).
 
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