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PERC 5/i RAID Card: Tips and Benchmarks - Page 384

post #3831 of 7150
Quote:
Originally Posted by felix View Post
The Perc5/E indeed has the BBU connected in the RAM module. It's BBU cable is shorter, has same connector with JC 881 cable for Perc5/i BBU, but on both ends and has the same number of wires. BBU for the Perc5/E has something like a holding bracket embedded, in order to mount on the RAM module.

I thought that having the same connector and same specs (3.7V / 7Wh) could do the job for me. Part Number is :

JP-0X8483-71763-78T-D747 and it's REV A01.

I think i'll contact the seller for clarification.

Thank you for your help, DJZeratul
Unfortuanetly I havent ever tried a 5/e so i couldnt tell you definitively if it would work or not, but it seems that if you cant get it to find the BBU, chances are something is different. I did a pretty exhaustive search on the internets when my 5/i's BBU was messed up to try to find a pin diagram or any kind of helpful advice but unfortunately found nothing. This was a year ago, but, I am afraid that you are on your own on this one. I would definitely contact the seller. I have a couple buddies at Dell that I can ask, but they were not very helpful in the past Its worth a shot though. I'll see what they come back with, since I have been wondering myself for awhile now.
    
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post #3832 of 7150
If you can ask i would be grateful...

If some new info comes up, it would be nice to be included as an update in the first post.

I'll also ask the seller meantime...
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post #3833 of 7150
I was searching for a cheap RAID 5 solution, when I came across this thread. I want to try out one of the PERC cards, but I am not sure which one to get.

Which is the better performer the 5i or 6i?

This thread is too massive to read through so I was hoping someone might be able to answer this for me.

Also, is this the correct PERC 6i card (http://cgi.ebay.com/DELL-SAS-RAID-Co...em1c0f4de175)? Doing a quick search of this thread, someone bought a PERC6 that looked similar but was the incorrect version.

Thanks for your help.
post #3834 of 7150
Quote:
Originally Posted by coolrunner84 View Post
I was searching for a cheap RAID 5 solution, when I came across this thread. I want to try out one of the PERC cards, but I am not sure which one to get.

Which is the better performer the 5i or 6i?

This thread is too massive to read through so I was hoping someone might be able to answer this for me.

Also, is this the correct PERC 6i card (http://cgi.ebay.com/DELL-SAS-RAID-Co...em1c0f4de175)? Doing a quick search of this thread, someone bought a PERC6 that looked similar but was the incorrect version.

Thanks for your help.
That is a SAS 6/iR which is a crippled, non-Hardware RAID5 version (I dont even think you can set up a RAID5 array on them)

For about 20 dollars more you can get a guaranteed 5/i or 6/i from Borito, he has cards available every once in awhile. Do a search for PERC and you should find a sale thread.

The 6/i has theoretically better performance, but I havent seen numbers that really blow the 5/i out of the water. The 6/i has a native PCI-e interface and LSI SAS chipset which is supposed to be more efficient. The 5/i has an Intel XScale with PCI-X to PCI-e bridge chip. Like I said before, though, the differences haven't really been mind boggling. Some other 6/i benefits: RAID6 support, and larger stripe sizes (512KB and 1024KB) on the stock Dell firmware (5/i needed an LSI flash to get the larger stripe sizes over 256KB). 5/i also has removeable/replaceable/upgradeable RAM, the 6/i has the RAM soldered on, so if your RAM dies, you have to replace the entire card.

Basically, unless you can get the 5/i for a lot cheaper, I would go with the 6/i. Its a more solid and up to date card, and performs quite well.
Edited by DJZeratul - 1/9/10 at 4:42pm
    
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post #3835 of 7150
thanks DJZeratul
post #3836 of 7150
Anyone in the UK want a bargain (with a slight risk...)?

This auction is listed as a SAS 6i/R, but the picture clearly shows a PERC 6/i, and the auction refers directly to the picture - so if a SAS card turns up you can send it back as the item is not as described. In the UK that means a full refund including shipping and any charges incurred.

A bargain for 60 notes shipped. I'd buy it myself if I didn't already have 3...
Edited by the_beast - 1/10/10 at 4:13am
post #3837 of 7150
Hi guys, a quick update on recent hardware. Couldn't find anyone with a PERC5/i and a socket 1156 mainboard. I gambled it and bought one.

I put a PERC5/i (latest LSI firmware MT33) on a new ASUS P7P55D PRO mainboard (bios 1207, CPU Core i5). With the pinmod (5,6) it works without any problems. Without the pinmod it won't boot (hangs with black screen before post).

The motherboard has 3 PCIE slots. I tested both the middle PCIE slot and the bottom one. The bottom one is PCIE x16 but is limited to x4 mode, so I found that one the most suitable to use. (x4 is more then enough for most setups). You will still be able to do Crossfire/SLI (x8/x8)with the top 2 PCIE slots.

Performance seems fine, but can't find any reliable source to verify against.
Disks: 4x 750GB Samsung F1 HD753LJ firmware 1113
Config: RAID5, 64KB Stripe Size, Adaptive Read Ahead, Writeback with BBU, Direct IO

Quick Benchmark:
HDTUNE 4 (accurate max, 64kb blocksize) gives around 200MB average read speed and 430MB burst rate.

cheers,
Raf
post #3838 of 7150
regarding my bbu not charging issue. I did a continuity check and the wires seem fine. However, I did find the the black ground wire is shorted to the red wire through the card. For instance if I check between the cards metal connectors and the solder points behind it, I see that pin 1 and 3 (red and black) are connected electrically.

Further tested by touching one end to the cards pci bracket and the other to each pin individually, which showed black grounded and red grounded. That doesn't seem like normal behavior and I'm not sure if it is fixable.

Whenever I get the battery to discharge it shows the voltage at 3680mV and around -700mA. I'm not sure if the amps should be negative but I imagine there is nothing wrong there.

When I touch the positive end to the pci bracket and the negative end to the red (pin1) it makes a sound (voltage flows), but when I press the positive end to the red and the negative to the pci bracket it doesn't (no sound).

Anyone have a clue?
Edited by GregOP83 - 1/10/10 at 7:07pm
post #3839 of 7150
Quote:
Originally Posted by GregOP83 View Post
regarding my bbu not charging issue. I did a continuity check and the wires seem fine. However, I did find the the black ground wire is shorted to the red wire through the card. For instance if I check between the cards metal connectors and the solder points behind it, I see that pin 1 and 3 (red and black) are connected electrically.

Further tested by touching one end to the cards pci bracket and the other to each pin individually, which showed black grounded and red grounded. That doesn't seem like normal behavior and I'm not sure if it is fixable.

Whenever I get the battery to discharge it shows the voltage at 3680mV and around -700mA. I'm not sure if the amps should be negative but I imagine there is nothing wrong there.

When I touch the positive end to the pci bracket and the negative end to the red (pin1) it makes a sound (voltage flows), but when I press the positive end to the red and the negative to the pci bracket it doesn't (no sound).

Anyone have a clue?
1 and 3 should technically be "continuous" on a voltmeter because if you connect them together it forms a DC circuit (positive red and negative black). It would be like if you removed the red and black leads off your car battery and hooked a volt meter up to them, it should create a continuous circuit (don't do this on the battery in real life unless you have a really beefy voltmeter )
    
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post #3840 of 7150
I've attached a few oddities in my raid5 performance below. I don't know how but I accidentally deleted the originals that I made right after creating the array. Basically, take all the major spikes out of the benchmarks and you'd have what I got originally. Now I've got these massive spikes and I'm not sure why. I've forced WB since my BBU is not charging. I could try always read ahead instead of adaptive. Maybe it's just a file-system thing since there is about 562GB on it now (2.32TB total available). It could also be the controller not liking that the BBU is no longer charging.




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