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@viCommunications - yeah I wouldn't be too sure of that. We bought a hosting provider in Missouri about 3 years ago, almost none of their servers had cases, each server was bolted to a piece of plexiglass (or something) and almost everything else was duct taped, superglued to the board. Awful! Needless to say all that kit got junked and replaced with proper HP equipment but was the first time I saw that and it was quite a respected company.
So what is ramnode using to get 1.4G from dd 64k 16k?
We hacked DD obviously. Haven't you heard?
Word on the street is you used plain $2 duct tape for your SSDs and not the $5 expensive duct tape. Just sayiin'
What makes the m550s a good choice?
They're cheap and they have capacitors. I'm not sure why you'd use a RAID card with SSDs that have capacitors, but not my money . . .
Having used many SSDs in my machines since 2009, Samsung has been my favorite. I moved from a 128GB 840 PRO (kickass drive) to a 250GB EVO - still awesome performance, haven't been able to hit any limits on it. Great value for the price, go for it if you can get them cheap.
Although the PCI-based SSD in my new retina MacBook Pro seems to spank every other SSD I own...
I believe we are talking about highly utilized RAID in server environment here.
I would always recommend Intel 520 drives they r not the fastest but they last long and they have cinsistant speed when I say thati mean the drive performance after chlif is what's written on the box.
They are next to impossible to find consistently in quantity, I believe they are out of production. They were great drives though . . .
Yeah if we could go back to using Samsung 830s...
Yeah I still have 6 unopened ones
Hello, bad news... I have a HP DL380 Gen7 and I have added a LSI 9266-8i in the reiser card.
Still using the HP original backplane and cables, but connected to the LSI instead to the origianl P410i.
I have added 8 x SSD Crucial M550.
Playing with many config options, but never can get more than 800MB/s in dd test.
I expected to get around 2-3 GB/s in RAID-0
This image is the test in RAID-0
Any idea?
Thanks.
@jmginer, your backplane is 3Gbps. Theoritical real world max speed is 275MB/sec per SSD.
8 x M550 will give you 1GB/sec dd when they are connected at 6Gbps. So 800MB/sec is understandable.
If you want dd porn, go with Samsung 830 and 6Gbps ports. That way you'll get 1.6-1.8GB/sec.
I have any option to change to one running at 6Gbps ?
Intel 530s are still more or less available in qty. They were a good replacement for the 520s.
Nope.
MacGyver mode ON: Anybody know a 1U Power supply with 8xSATA connectors?
The power supply itself doesn't have to support it, you generally chain them anyways. If not, convert an existing end into a SATA and start chaining. If not, then you don't have a server PSU to begin with.
I thought that DL30 G7 was a passive SATA/SAS backplane? So it shouldn't care about the speed.