G-Speed Q Raid 5 Write Speeds

[Kevin_J]

Hey gang- can anyone give me any info on what their write speeds on a G-Speed Q in Raid5 are?

I'm only seeing like 95 MB/s Write. Read is good at 245MB/S.


We are running these (tested on 2 different units) ESATA into a Fasta-6GU3 in a Sonnet Echo Express Pro TBolt box.

 

[Ces Peynetti]

I usually get a 210 MB/s Write 230ish MB/s Read when I'm plugged in straight to my e-sata card. However I have used it with my Sonnet Echo TBolt box a couple of times and I get similar Write speeds to yours, which I hate. I haven't had the need to use the drive through the sonnet enough for me to care to look into it, but now I wonder if this has something to do with either the Sonnet or the Q.

 

[Jarek Zabczynski]

Isn't the esata on the Q only SATAII / 3Gbs? Read speeds look about right for that.

 

[Shiblon Wixom]

The G-raids and G-tech mini towers always negotiate down a couple steps with Caldigit cards, the controller seems to write at 1.5 Gb/s speeds no matter what, started several months ago after the 8.3 update and only seems to be a G-tech/Caldigit issue, could never get the problem resolved so I swap over to Sonnet cards when specifically dealing with G-Tech drives. Everything else seems to run at full speed on my Caldigit cards except for G-Tech stuff.

Don't forget that the Caldigit Fasta-6GU3 is not electrically a PCIe x4 card, it shares one lane between the two USB3 ports and one lane between the eSATA ports, its really a PCIe x2 card (which is why its relatively innexpensive I assume). When I connect two G-Raid drives to the eSATA ports, I can read at around 160 MB/s from both drives but I can only write at around 80 MB/s to both drives, at the same time. If I connect only one G-Raid it will read at around 180 MB/s but only write at around 100 MB/s.

If I connect only one Red SSD reader to the eSATA port on the F6GU3 it runs around 215 MB/s, if I connect two Red SSD readers to each eSATA port then both are capped for read/write to around 110 MB/s. I don't seem to have any issues with LaCie drives or single volume G-Drives, just anything with a G-Tech raid controller.

 

[Kevin_J]

So it sounds like the weak link here is the CalDigit card. Disappointing. Are there alternatives that will get the write speeds back up to a good level?