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PERC 5/i RAID Card: Tips and Benchmarks - Page 615

post #6141 of 7257
With my 512mb module installed MegaRaid software said battery was below threshold and disabled write-back and switched the array to write-through.
With my 256mb module installed MegaRaid software said battery was above threshold and allowed write-back with BBU again.

My only conclusion is that my battery at 800 mAh is not enough for a 512mb module. As this is my first (and only) perc 5 I've ever used personally (or had access to in a professional environment, companies I worked for mainly used HP Proliant servers) I am unsure if this is the correct conclusion. I will buy one later as it seems mine is below the rated maximum capacity it should be, and will need replacing at some point, anyway. Later when I do get said new battery I'll see if the 512mb works. But for now, since I can not use the BBU with my 512mb installed, I'm back to the 256mb for now, and the 512mb goes on the shelf in the closet for the future. At least it's cheap, and I have it here on hand for when I can use it later.

Also I wanted to thank you bobfig for showing me that Trip-Lite SATA cable a few pages back, I ended up buying one off ebay and I'm using it with my 4 SATA drives on my PERC5 for a while, working great! smile.gif
Edited by kithylin - 12/22/12 at 8:21pm
post #6142 of 7257
That's too bad since that is only available in US, and I'm in the Europe. frown.gif
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post #6143 of 7257
Quote:
Originally Posted by mahirzukic2 View Post

That's too bad since that is only available in US, and I'm in the Europe. frown.gif

Are you referring to the ram upgrade I found? You can message him and ask if he'll ship to europe, sometimes people will make an exception. What's the worst that could happen.. he says no?
post #6144 of 7257
LOL, you're right man. I'm gonna do that.
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post #6145 of 7257
Sorry to be so invansive, but Id really not want to read through all 615 pages of thread so here I go

Should I get the perc6/i or the perc5/i w/ upgraded RAM.
Im looking to build a RAID 5 array with around 4 RE4 drives.
Im looking for maximum performance, but if its ultra inconvenient for a certain option id rather not.

Thanks in advance
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post #6146 of 7257
Quote:
Originally Posted by An4rchyZ View Post

Sorry to be so invansive, but Id really not want to read through all 615 pages of thread so here I go

Should I get the perc6/i or the perc5/i w/ upgraded RAM.
Im looking to build a RAID 5 array with around 4 RE4 drives.
Im looking for maximum performance, but if its ultra inconvenient for a certain option id rather not.

Thanks in advance
perc 6/i is better overall id say.
post #6147 of 7257
Quote:
Originally Posted by An4rchyZ View Post

Sorry to be so invansive, but Id really not want to read through all 615 pages of thread so here I go
Should I get the perc6/i or the perc5/i w/ upgraded RAM.
Im looking to build a RAID 5 array with around 4 RE4 drives.
Im looking for maximum performance, but if its ultra inconvenient for a certain option id rather not.
Thanks in advance

If all you're doing is raid5, the PERC 5/i would be a good solution for you. What are you intending the computer running the raid array to do? If it's just a NAS box the PERC5/i in raid5 will push full gigabit speed without a problem, with the default dell firmware these things normally come with. The PERC6/i is newer, supports RAID6 and may be a tad faster, but also more expensive, but if it's just a NAS box then any speed above the PERC5/i is probably irrelevant.

Also if you're running like a database on it or the OS on the array and speed is more important, you can consider getting the 5/i and re-flashing it's firmware to LSI firmware. That's what I did with my PERC5/i and it instantly doubled it's speed/throughput compared to the dell firmware that was on it.

Currently there's not any really good deals with either the PERC 6 or PERC 5 on ebay, I looked real fast and the cards that come with caching modules at all and BBU are in the $60+ range, and most of em don't come with a full height bracket or the 512mb module. I guess I just got damned lucky finding mine for $30 with bracket and BBU, even though it only had a 256mb module with mine.
post #6148 of 7257
Quote:
Originally Posted by kithylin View Post

If all you're doing is raid5, the PERC 5/i would be a good solution for you. What are you intending the computer running the raid array to do? If it's just a NAS box the PERC5/i in raid5 will push full gigabit speed without a problem, with the default dell firmware these things normally come with. The PERC6/i is newer, supports RAID6 and may be a tad faster, but also more expensive, but if it's just a NAS box then any speed above the PERC5/i is probably irrelevant.
Also if you're running like a database on it or the OS on the array and speed is more important, you can consider getting the 5/i and re-flashing it's firmware to LSI firmware. That's what I did with my PERC5/i and it instantly doubled it's speed/throughput compared to the dell firmware that was on it.
Currently there's not any really good deals with either the PERC 6 or PERC 5 on ebay, I looked real fast and the cards that come with caching modules at all and BBU are in the $60+ range, and most of em don't come with a full height bracket or the 512mb module. I guess I just got damned lucky finding mine for $30 with bracket and BBU, even though it only had a 256mb module with mine.

In that case could I flash the perc6 with a better firmware because really at current prices the 6/I is around the same price. Also with the firmware flash would the perc5 be faster?
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post #6149 of 7257
Quote:
Originally Posted by An4rchyZ View Post

In that case could I flash the perc6 with a better firmware because really at current prices the 6/I is around the same price. Also with the firmware flash would the perc5 be faster?
I don't know with re-flashing to LSI firmware is faster in perc5 vs perc6, all I own is a PERC 5/i and it worked well for me. Originally when I bought it, it came with the dell firmware installed on it. I set it up with 4 x matched hard drives: 7200 rpm, 160gb, SATA-II, 8mb buffer, Western digital blue, running raid5. Under the dell firmware it was getting a flat 160-165 MB/sec in all tests I could run (Sandra, hdtune, hdtach), all of em came back at about 160 - 165 MB/sec (I don't test with crystalmark because it's always -50% less than all other tests so isn't accurate in my opinion.)

Then I re-flashed my PERC5/i to the latest LSI firmware using the windows flash method included with the firmware (not sure if that matters vs the dos flash method) then shut the machine down. Powered it up again and instantly when it started up, it was reporting 295 - 307 MB/sec in all the same tests, no other configuration changes or hardware changes made. Also windows experience index (yes my OS is running on the array) went up +0.6 points.

This is my experience with my PERC 5/i. I do not own a PERC 6/i, I do not know if a PERC6 will have similar results or not. It may be burried somewhere back in this thread (the flash speed info on the perc6) I haven't looked that far back past page 540 to be honest, since my perc5 is running so smoothly now.

And.. these are slower 7200 rpm drives, older ones with small buffer size (8mb). I have 4 x 15k RPM SAS drives coming with 16mb buffer. I'm expecting better performance from those (hopefully). If they work out I'll get 4 more.
Edited by kithylin - 12/27/12 at 12:54pm
post #6150 of 7257
Quote:
Originally Posted by dukzcry View Post

Well, there wasn't such a problem when i used an old LSI revision. I'm trying to figure after which one revision it got "introduced". The first post points to 7.0.1-0068. Anyone with higher rev. not having this issue?
I have LSI rev 83 and has been running smooth for over 1 year
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